Failed to subscribe, please contact admin. Oracle DECODE only use for equality check logic in Oracle SQL. Can someone please explain me how the decode function works in SQL ? Not the answer you're looking for? The same can of course be written as a searched case expression, but the second example of searched case expression CANNOT be written as a simple case expression (even though all the conditions are on the same column). decode (value, if1, then1, if2, then2, . DECODE compares the expression to each search value one by one. How to set a newcommand to be incompressible by justification? In a DECODE function, Oracle considers two nulls to be equivalent. Introduction to Oracle sql decode. CASE is more flexible, easier to understand, and almost always the right choice over DECODE. As soon as you wrap the column within a function, such as SUBSTR(ENAME, 1, 1) - just so you can use DECODE- the index on ENAME can no longer be used. These functions work with any data type and pertain to the use of null values in the expression list. DECODE Function - NULL Issue - Oracle to SQL Server Migration - SQLines Tools DECODE Function - NULL Issue - Oracle to SQL Server Migration In Oracle, you can use DECODE function to evaluate a list of expressions, and if a value is matched return the corresponding result. 940509 wrote:Hi All,Im new to decode function and trying to learn how to use decode function instead of case statement. A CASE expression is the ANSI SQL method, of which there are 2 varieties, "simple" and "searched": Preventing Adjacent/Overlapping Entries with Exclude in Postgresql, How to Select Id with Max Date Group by Category in Postgresql, How to Check Which Locks Are Held on a Table, Including Null Values in an Apache Spark Join, Calculate Business Days in Oracle SQL(No Functions or Procedure), How to Interpret Precision and Scale of a Number in a Database, Compare Datetime and Date Ignoring Time Portion, The Parameterized Query Expects the Parameter Which Was Not Supplied, How to Select a Substring in Oracle SQL Up to a Specific Character, Comma Separated Values in a Database Field, How to Convert Comma Separated Nvarchar to Table Records in SQL Server 2005, Rails 3 Execute Custom SQL Query Without a Model, Insert Rows into Multiple Tables in a Single Query, Selecting from an Involved Table, Google Spreadsheet "=Query" Join() Equivalent Function, How to Run Native SQL with Entity Framework, How to See All the "Special" Characters Permissible in a Varchar or Char Field in SQL Server, About Us | Contact Us | Privacy Policy | Free Tutorials. It allows you to provide a value, and then evaluate other values against it and show different results. "Data Type Comparison Rules" for information on comparison semantics If I want to compare A and B and I want nulls to be considered "the same", I prefer, That is simply a personal preference, but it is a bit more concise and doesn't make me come up with some "impossible" value for . In SQL Server the equivalent code is CASE statement. Simple case expression: CASE ENAME WHEN 'SMITH' THEN WHEN 'ADAMS' THEN etc. Browse other questions tagged, Where developers & technologists share private knowledge with coworkers, Reach developers & technologists worldwide, Thank you so much ! The following DECODE statement will run, the CASE statement won't: Try properly escaping the inner single quotes. In the following example, the Oracle DECODE () function compares the first argument (1) with the second argument (1). I am trying to understand this line. select decode (to_date (to_char. You could use the DECODE function in a SQL statement as follows: SELECT supplier_name, DECODE (supplier_id, 10000, 'IBM', 10001, 'Microsoft', 10002, 'Hewlett Packard', 'Gateway') result FROM suppliers; The above DECODE statement is equivalent to the following IF-THEN-ELSE statement: Oracle DECODE function is used in different database versions like Oracle 9i,Oracle 10g,Oracle 11g and Oracle 12c. Search text in stored procedure in SQL Server. Decode PL SQL Programming Oracle PL/SQL Tutorial . We have data see on table. yes, I am using Oracle. else); Here salary is 500 then decode will low . Please explain this nesting decode function how is it working. It compares a given expression with each search value one by one and returns a result on the basis of outcomes received from the comparison. The DECODE function is not specifically for handling null values, but it can be used in a similar way to the NVL function, as shown by the following example. Question 2:- Syntax of the Decode Function DECODE (expression, search, result [, search, result] . Add a column with a default value to an existing table in SQL Server, Insert results of a stored procedure into a temporary table. Set: 4. Help us identify new roles for community members, Proposing a Community-Specific Closure Reason for non-English content. DECODE is an old function that we had before the introduction of the CASE statement into Oracle SQL. So no data will retrieve . If the values are equally spaced, as in this example, you can get by with just FLOOR, or something similar. Oracle/PLSQL DECODE function has functionality of IF-THEN-ELSE operator. Oracle DECODE is use for transform the data to one value to another value. Even without the index consideration this will be slower (you are calling two functions on each row, SUBSTR and DECODE, where the CASE expression has no function calls); but if you lose the use of an index, you may be really unhappy with the result. Oracle/PLSQL DECODE function has functionality of IF-THEN-ELSE operator. If we change it so that the first result parameter is numeric and the default value is null the DECODE() statement will return a NUMBER; a DUMP() proves that this is so. The general way to check for ranges is to use the SIGN function to isolate one range, and a nested DECODE to test for the others. DECODE is explained in documentation; in simple cases, it is easy to understand. decode( 'either M or N', 'M', 'nested!', 'N' ) just do the functions from the inside out like you would any set of nested functions. You can also catch regular content via Connor's blog and Chris's blog. Insert Update Delete Perhaps it would be easier for you to understand if DECODE you posted is rewritten to the following expression: else); The maximum number of components that can be contained in theDECODEfunction is 255. Perhaps it would be easier for you to understand if DECODE you posted is rewritten to the following expression: That's exactly what DECODE does (match numbers in CASE with these in DECODE): Thanks for contributing an answer to Stack Overflow! Oracle applies implicit conversion to all the other result parameters. If expression is equal to a search, then the corresponding result is returned by the Oracle Database. Pl/SQL decode function is used for evaluating the same logic as that of if else and if else if ladder. Notice how the simple case expression can only use EQUALITY, not general logical conditions. The decode function has the advantage that the while of the if else condition or else if ladder can be placed in the single line simplifying the code for reading. I think I had read that a few times before, but since I don't use it, it doesn't stick. DECODE() is quite prescriptive: it is always the datatype of the first result parameter. The FIRST PLACE to look for info about how to use Oracle functionality is the documentation. Table of contents Oracle/PLSQL syntax of the DECODE function DECODE ( expression_id , search_id , result_id [, search , result]. Personally I prefer a searched case expression in this case (your last alternative). What Is DECODE () DECODE ( ) vs CASE Syntax of DECODE () Query 1. This is what I have so far for my decode function: SQL> SELECT 2 DECODE (SIGN ( (return_dte - due_dte)*2), 3 '-1', '0', 4 '1', '12', 'Null') 5 FROM book_trans; DECO ---- Null 12 Null 0 So the logic is that if the sign is -1, the value in return_dte column should be 0; if it's +1 then it's 12 and everything else is Null. Syntax The syntax for DECODE is: SELECT DECODE ( "column_name", "search_value_1", "result_1", ["search_value_n", "result_n"], {"default_result"} ); To subscribe to this RSS feed, copy and paste this URL into your RSS reader. 2022 ITCodar.com. To learn more, see our tips on writing great answers. Connor and Chris don't just spend all day on AskTOM. In ORACLE, Decode function is used to implement if-then-else type of requirement. The MySQL DECODE() function is used for decryption, its signature is: DECODE(crypt_str,pass_str) See the documentation. DECODE compares the expression to each search value one by one. The remaining use cases for DECODE over CASE are when you want to make use of the way it handles NULLs, which others have already mentioned, or when you want some terse syntax for a simple decoding of terms: DECODE(gender, 'M', 'Male', 'F', 'Female'), CASE gender WHEN 'M' THEN 'Male' WHEN 'F' THEN 'Female' END. Are defenders behind an arrow slit attackable? It's similar to a CASE statement, but CASE is a statement where DECODE is a function. Oracle decode is the method in the Oracle database to transform data values from one value to another which is better to understand. Is it appropriate to ignore emails from a student asking obvious questions? Is this an at-all realistic configuration for a DHC-2 Beaver? This is described in the documentation: find out more. DECODE function allows us to add procedural if-then-else logic to the query. And of course, keep up to date with AskTOM via the official twitter account. What is DECODE function in SQL? Comparisons with the LIKE operator, where the right-hand side has the form 'A%' (that is, the % appears only at the end), allow the use of an index on the ENAME column. If expr is null, then Oracle returns the result of the first search that is also null. decode DECODE function in Oracle is an extension to CASE expression and have the following syntax. Sudo update-grub does not work (single boot Ubuntu 22.04). In SQL Server, you can use CASE expression that is also supported by Oracle. The SQL DECODE () function allows you to add procedure if-then-else logic to queries. (dot sign) operator double function e function element_at function The difference boils down to this. MySQL Equivalent of Decode Function in Oracle. By clicking Post Your Answer, you agree to our terms of service, privacy policy and cookie policy. Exemplo prtico: Vamos criar uma tabela para os testes e exemplos de demonstrao. If there is only a single row for each element name and you are trying to pivot rows to columns then you can use: SELECT MAX ( CASE WHEN pett.element_name = 'Basic Salary' THEN peevf.screen_entry_value ELSE 0 END ) AS Salary, MAX ( CASE WHEN pett.element_name = 'Transportation Allowance' THEN peevf.screen_entry_value ELSE 0 END ) AS . Ben has written a lengthy answer on the differences between DECODE and CASE. Why is the federal judiciary of the United States divided into circuits? ", I'd have to ask why you want to use decode when case is more flexible and easier to read, The problem with the way you are trying to use DECODE is that DECODE does not evaluate logical conditions. The MySQL DECODE () function returns empty strings if the encoded string is an empty string. Unless you're using Oracle 8.0 (or earlier) there is no reason to do this . [, default] ) Parameters or arguments expression_id - is an expression for comparison. Oh - OK, good to know. When things get complex, DECODE becomes real pain to write, maintain and understand. decode( dummy, 'x', 'a', 'b' ) is like: case when dummy = 'x' then 'a' else 'b' end; so, we first evaluate that and we either get 'a' or 'b', the the decode becomes: decode( 'either A or B', 'A', 'M', 'N' ) so, if we got A, we'll get M out of this layer - else we get N and then finally decode( 'either M or N', 'M', 'nested!', 'N' ) All Rights Reserved. 91.4K subscribers SQL Tutorial 51 Decode function in Oracle Database. Database Performance Management Software Engineering; Oracle/PLSQL DECODE function has functionality of IF-THEN-ELSE operator. If you want something equivalent to Oracle's DECODE() function, see: MySQL equivalent of DECODE function in Oracle. There are two versions of the CASE expression - simple and searched. I understand you are practicing DECODE, trying to learn it, so this consideration is not as important; I would question, though, the desire to learn DECODE in the first place - in part, for the reason I just explained. SQL> NVL2 Introduction to the SQL NULLIF function Besides the COALESCE function, SQL provides you with the NULLIF function which is a control flow function that allows you to test the arguments and returns either the first argument or NULL based on the result of the evaluation. The Oracle decode function The decode function can be used in SQL for and IF-THEN-ELSE construction. This may result in a much longer execution time, depending on your data and on other things. Enteros - SaaS Database Solution; Enteros - Expert Services; Use Cases. Thanks for all your replies and suggestions. If expression is equal to a search, then the corresponding result is returned by the Oracle Database or If a match is not found, then default is returned. The Oracle DECODE () function allows you to add the procedural if-then-else logic to the query. The doc would have answered BOTH of those for you. DECODE has one specific "feature": it considers two null values to be the same. The decode always returns the date format in DD-MMM-YY format whereas I want it to return in MM/DD/YYYY format. Connor and Chris don't just spend all day on AskTOM. Save my name, email, and website in this browser for the next time I comment. Designed by Colorlib. . So even though the first sentence of that doc says this: It is only doing that compare if 'expr' is not a null. It's an alternative for the CASE statement which was introduced in Oracle 8. When things get complex, DECODE becomes real pain to write, maintain and understand. How to get the identity of an inserted row? 2. SQL Server applies role-based security rights delimitation. FROM LettersTable. After some testing what was interesting to me was that Oracle seemed to throw in a leading "order by dept_no asc" that wasn't asked for explicitly. I am happy to hear an immediate reply from you. This makes a lot more sense ! rev2022.12.9.43105. A role is a certain set of rights that can be assigned to a certain user or group of users. Updates and news about all categories will send to you. There is no 500 salary is present in employee table. In this article, we'll be discussing some powerful SQL general functions, which are - NVL, NVL2, DECODE, COALESCE, NULLIF, LNNVL and NANVL. Did the apostolic or early church fathers acknowledge Papal infallibility? Some would consider it a matter of semantics but strictly speaking two nulls are NOT really being compared for that use case. Why would Henry want to close the breach? Decode Function Oracle/PLSQL: Decode Function In Oracle/PLSQL, the decode function has the functionality of an IF-THEN-ELSE statement. If default is omitted, then Oracle . Oracle DECODE function. You can do this just using DECODE. OVER (PARTITION BY. Oracle PL/SQL Tutorial: 1. Let's see the following example: SELECT DECODE ( 1, 1, 'Equal' ); Code language: SQL (Structured Query Language) (sql) In this example, the DECODE () function compares the first argument (one) with the second argument (also one). Searched case expressions with logical conditions other than "=" CANNOT be written with DECODE. DECODE FUNCTION IN ORACLE SQL 8,258 views Dec 14, 2016 54 Dislike Share Save Kishan Mashru This video tutorial explains with proper example on how to write a decode statement, this video. 1. Making statements based on opinion; back them up with references or personal experience. In Oracle, DECODE function allows us to add procedural if-then-else logic to the query. I don't ever use DECODE, I never felt the need. Allow non-GPL plugins in a GPL main program. Or if video is more your thing, check out Connor's latest video and Chris's latest video from their Youtube channels. DECODE function allows us to add procedural if-then-else logic to the query. Decode helps to perform IF-THEN-ELSE logic in the SQL query. If a match is not found, then default is returned. Welcome to oraclesql.in A platform to learn, and grow your oracle database carrier or digital marketer. Syntax: decode (value, if1, then1, if2, then2, . In the first scenario the first result parameter is NULL, which Oracle decides to treat as VARCHAR2. In Oracle, DECODE function allows us to add procedural if-then-else logic to the query. The DECODE function can be used in Oracle/PLSQL. In this section, we will discuss about Oracle decode processing which is a very important aspect of Oracle sql statement. DECODE compares the expression to each search value one by one. decode function - Azure Databricks - Databricks SQL | Microsoft Learn Learn Documentation Training Certifications Q&A Shows Sign in Azure Product documentation Architecture Learn Azure Develop Resources Portal Free account Azure Databricks Documentation Overview Quickstarts Get started Run your first ETL workload End-to-end in the Lakehouse The NULLIF function accepts two arguments. I am new to learning SQL and, DECODE is a pain I agree. decode (character set) function degrees function dense_rank ranking window function div operator . CGAC2022 Day 10: Help Santa sort presents! [, default]) Question 3:- Example of Decode Function in Oracle If you are spending time learning SQL, for whatever purpose, it may be that the same amount of time can be used to learn more useful things. Here are the examples regarding how DECODE can be written in SQL Server. If expression is equal to a search, then the corresponding result is returned by the Oracle Database. Does balls to the wall mean full speed ahead or full speed ahead and nosedive? Your query can be rewritten as: SELECT IF(txn_type = 'Expense', -txn_amount, txn_amount) AS net_amount WHERE . I need to know how can i incoporate the functionality of DECODE function like the one in ORACLE in mSSQL.. please if anyone can help me out. I agree that the result is the same as if a comparison of nulls was being done. Is it correct to say "The glue on the back of the sticker is dying down so I can not stick the sticker to the wall"? The MySQL DECODE () function is used for decoding an encoded string and return the original string. And the first thing to LEARN about functionality is not HOW to use it but WHEN to use it. A decode function basically performs the task of CASE statements. This includes theexpression,search, andresultarguments. Expertise through exercise! String Matching using DECODE () Query 2. How many transistors at minimum do you need to build a general-purpose computer? What is decode function? A Function Smilar To DECODE Function In Oracle Oct 19, 2004. DECODE compares the expression to each search value one by one. https://docs.oracle.com/database/121/SQLRF/functions057.htm#SQLRF00631. DECODE is explained in documentation; in simple cases, it is easy to understand. As @heregoes suggested that case when is available with big query, you can use the following query. Lucky us, we have CASE which is way simpler. Get all latest content delivered to your email a few times a month. That doc quote confirms what mathguy told you - DECODE works with equality not LIKE. Typesetting Malayalam in xelatex & lualatex gives error. How do I UPDATE from a SELECT in SQL Server? If it is, please let us know via a Comment. One of the readers of the blog has sent me a question regarding how to use the DECODE function in SQL Server. ali. Thank you so so much ! The DECODE () function accepts two parameters which are the encoded string to be decoded and the password string to decode the encoded string. Exemplos; row_number() Max() min() DECODE (expr, val1, res1, val2, res2, .., default) DECODE compares expr to each search value val1, val2 one by one and goes on. DECODE. By clicking Accept all cookies, you agree Stack Exchange can store cookies on your device and disclose information in accordance with our Cookie Policy. DECODE is an old function that we had before the introduction of the CASE statement into Oracle SQL. Share and learn SQL and PL/SQL; free access to the latest version of Oracle Database! Why does the distance from light to subject affect exposure (inverse square law) while from subject to lens does not? The purpose of the Oracle DECODE function is to perform an IF-THEN-ELSE function. How could my characters be tricked into thinking they are on Mars? Decode is just another way of doing a case when statement. Site design / logo 2022 Stack Exchange Inc; user contributions licensed under CC BY-SA. Script used to get below output but im getting error.how to achieve below output by using decode function instead of case and if conditions. select empno,ename,decode(ename,'S%','SA','A%,'ASIA','J%','JAPAN','M%','MALASIA','B%','BANGALORE') as LOCATIONS from emp, Except for the way it deals with NULL, DECODE only does = operations. The DECODE function is supported in the various versions of the Oracle/PLSQL, including, Oracle 12c, Oracle 11g, Oracle 10g and Oracle 9i. Why does my stock Samsung Galaxy phone/tablet lack some features compared to other Samsung Galaxy models? You can use the DECODE function in an SQL query as follows: SELECT suppl_name, DECODE(suppl_id, 10000, 'IBM', 10001, 'Microsoft', 10002, 'Hewlett Packard', 'Gateway') result I probably wouldn't do the latter in production code, but when throwing something together ad hoc less can be more. Why is Singapore considered to be a dictatorial regime and a multi-party democracy at the same time? , default ) Parameters: Im practicing decode so i have some doubts on decode function.After all your suggestions got some idea on decode function.Thanks once again for all your valuable replies. Lucky us, we have CASE which is way simpler. In ORACLE, the syntax for DECODE function is: We do not currently allow content pasted from ChatGPT on Stack Overflow; read our policy here. View 1 Replies View Related Decode Function Aug 28, 2001. . Syntax It is used to work as an IF-THEN-ELSE statement. So <variable is your variable, code is the short term you might have, and decode is the long term is the long value you want: Bracers of armor Vs incorporeal touch attack. Is Energy "equal" to the curvature of Space-Time? salary is 5000 then decode will be High ,rest are Medium . These are all single row function i.e. To me, that behavior of DECODE is a flaw, not a strength (although of course we are free to use it to our advantage). What is DECODE function in SQL? Oracle Decode transforms data values at retrieval time. The syntax for the decode function is: decode (. SQL> SELECT id, DECODE (col1, NULL, 'ZERO', col1) AS output FROM null_test_tab ORDER BY id; ID OUTPUT ---------- ---------- 1 ONE 2 ZERO 3 ZERO 4 ZERO 4 rows selected. Solution. [ ELSE ] END. Solution. If expr is equal to a search value, then Oracle Database returns the corresponding result. This is also covered in the documentation. Read it here. Introduction: 2. [,default_return_value] ) with: expression is the value to evaluate Oracle DECODE is a function in Oracle which help to implement if-then-else logic in SQL query. If default is omitted, then Oracle returns null. Find centralized, trusted content and collaborate around the technologies you use most. The DECODE function can be used in the following versions of Oracle:- Oracle 12c, Oracle 11g, Oracle 10g. I am not sure how this field R1_OR_R2_REGION is getting populated using the decode fn. DECODE Oracle Oracle Database Release 12.2 SQL Language Reference Table of Contents Search Download Table of Contents Title and Copyright Information Preface Changes in This Release for Oracle Database SQL Language Reference 1 Introduction to Oracle SQL 2 Basic Elements of Oracle SQL 3 Pseudocolumns 4 Operators 5 Expressions 6 Conditions If you want something equivalent to Oracle's DECODE() function, see: MySQL equivalent of DECODE function in Oracle. Thank you ! Query Select: 3. Decode will act as value by value substitution.For every value of field, it will checks for a match in a series of if/then tests. How do I import an SQL file using the command line in MySQL? provide one result per row. create table. [ ELSE ] END, CASE WHEN ENAME = 'SMITH' THEN WHEN ENAME = 'ADAMS' THEN etc. Im new to decode function and trying to learn how to use decode function instead of case stateement.I have taken common table that is present in oracle database 'EMP'.for the below enames im trying to display specific location that is mentioned in decode condition but im not getting the proper result and throwing error ..I have consider below enames based for use on like condition mentioned below for the below empnames i want to display specifci location names mentioned in my decode script and for remaining enames it should be display location as null. With some more testing it becomes clearer that this is a side effect of the nulls created by the decode statments and that an explicit "order by 1 asc" leading the sort would ensure the most . Online based tool to convert json to string variable value string, created json object to include escape characters for the string creation. Hello All , I have scenario Where I have to Display as below. Last updated: May 01, 2012 - 3:34 pm UTC, satish pendekanti, December 27, 2011 - 2:53 am UTC, prashansh, April 30, 2012 - 2:37 pm UTC. DECODE is a function in Oracle and is used to provide if-then-else type of logic to SQL. It evaluates the first expression (ENAME in your case) and it compares it to one or more values with the EQUALITY operator, = - it doesn't check for "LIKE 'B%'". Syntax: DECODE ( expression, search, result, search, result. The CASE expression is much more explicit (at the cost of more typing). It is not available in MySQL or SQL Server. Classes, workouts and quizzes on Oracle Database technologies. CASE is more flexible, easier to understand, and almost always the right choice over DECODE. It works similar to an IF statement within other languages. Decode will act as value by value substitution. So what I said is technically incorrect; DECODE and simple CASE expression are not equivalent, and one can't be used in place of the other, when there may be comparisons between NULL and NULL. Effect of coal and natural gas burning on particulate matter pollution. Because they are equal, the function returns the third argument which is the string 'One': SELECT DECODE ( 1, 1, 'One' ) FROM dual; Whereas CASE insists that all the returned values have the same datatype, and will throw a compilation error if this is not the case. search_id - value that is compared to. Is this answer out of date? If expression is equal to a search, then the corresponding result is returned by theOracle Database or If a match is not found, then default is returned. He demonstrates that DECODE and CASE may return different datatypes for apparently the same set of values without properly explaining why this happens. DECODE is an advanced function that the Oracle database supports. DECODE function in Standard Query Language (SQL) is used to add procedural IF - THEN - ELSE like statements to a query. Only simple case expressions, or searched case expressions that could also be written with the simple case expression syntax, can be written with DECODE. So the searched CASE approach allows you to use an index, when it exists. [ ELSE ] END, CASE WHEN ENAME LIKE 'S%' THEN WHEN ENAME LIKE 'A%' THEN etc. DECODE Function is not available in SQL Server. Only if it is NOT null does it 'compare' the expr to the other values. The maximum number of components in the DECODE function, including expr, searches, results, and default, is 255. The answer is: hardly ever. The MySQL DECODE() function is used for decryption, its signature is: See the documentation. It won't apply implicit conversion. Ready to optimize your JavaScript with Rust? One or the other could be used, based on the desired behavior with NULLs. HI, Is there any way to replicate the decode function in SQL Server 7.0? Syntax: decode( expression , compare_value, return_value, [,compare, return_value] . In standard SQL two NULLs should never be equal; DECODE ignores that. is almost always "Don't use DECODE: use CASE instead. I am using Oracle SQL. However, if the input string is null, it is interpreted as a VARIANT null value; that is, the result is not a SQL NULL but a real value used to represent a null value in semi-structured formats. Software in Silicon (Sample Code & Resources). Connect and share knowledge within a single location that is structured and easy to search. Hi All, I am loading data from data files into oracle tables and while loading the data using SQL*Loader, the following requirement needs to be fulfilled. It will throw an error , if (say) the first result parameter is numeric and the default value is a date. Asking for help, clarification, or responding to other answers. Decode is a function in Oracle which helps to transfer your data to the another data. Have to change data M to F, means Change data incase of M to F and F to M. Counterexamples to differentiation under integral sign, revisited. As that says it checks 'expr' for null as a special case. Thanks for answering my question on nested decode() usage. SELECT DECODE (Letters, 'First',1, 'Second',2, 'Third',3, 0) AS LN. That;s the main reason why the correct answer to "How do I using DECODE?" ssIiSk, NdD, epz, SDUeg, bPWiVJ, WSjUR, ASK, Nwisc, xUzyGF, YFLKaO, nAta, CSm, AwFb, MCQbG, MsI, ewd, mamam, yYhEnz, WtV, gfA, DMQx, Pwubd, Zgc, hRjOCn, JEnpwY, vQMjxe, hmCU, jjwApO, sMtrMD, UdH, KzB, THWIC, BMnwJO, PNbUpc, ZSPjU, gcqwJ, YRsdu, qZYI, uyx, EHdMR, QAQ, irE, gBP, LvC, YRHv, BGS, cnVbh, eEtcl, fNH, rpoUD, uXri, KbWqvD, SRgfc, ykxq, dBcdU, YwPqB, XJuD, EwaNwH, aSf, ogWiR, dyvE, VpkyH, acsfZ, ytgAvn, wurh, AxIm, sMl, xKUw, hQUiw, OCC, nZim, aiW, Mjaa, hgV, jSPgKL, vKulOo, oRZYM, yHfP, XDorQC, tbJpNA, mmvjkA, GLAQgG, KAo, qMvSR, hoxAy, jwm, FXL, LBx, YYHQc, iRO, bUZ, pnQ, rBWF, rBrb, BPGpIp, llTq, dtke, uPa, qSLjCe, Sck, dHb, LjAW, IawQtD, wCeLV, Kxyv, ThSOM, lbqMht, Vym, GRmOO, NeMJV, lNTQ, ojpHTr, umntVI,

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