,dbo. CREATE FUNCTION DECODE (CondField as nvarchar (100),Criteria as nvarchar (100), True Value as nvarchar (100), FalseValue as nvarchar (100)) returns nvarchar (100) begin return case when CondField Criteria then TrueValue else FalseValue end end. Insert into tbl_Sample1 values ('STD003','Hosanna','Fair') Create a function in SQL Server as below and replace the DECODE with dbo.DECODE. SQL> SELECT id, DECODE(col1, NULL, 'ZERO', col1) AS output FROM nulltesttab ORDER BY id ID OUTPUT - 1 ONE 2 ZERO 3 ZERO 4 ZERO 4 rows selected. Insert into tbl_Sample1 values ('STD002','Alexander','Good') 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. ![]() ![]() In Oracle, you can perform Base64 encoding and decoding using the UTLENCODE and UTLRAW packages. Insert into tbl_Sample1 values ('STD001','Bob','Excellent') If you need to encode or decode larger data, you might need to split the input into smaller chunks and perform the encoding or decoding operation iteratively. ![]() IF (Select Count (*) from A Where top 1 from Aĭecode (expression, search, result. INSERT INTO SELECT A.value('.', 'varchar(max)') as FROM AS FN(A) Summary: in this tutorial, you will learn how to use the Oracle COALESCE() function to return the first non-null arguments in a list. Given below is the DECODE function in SQL SERVER.Ĭreate FUNCTION. Lets view the Equivalent Code in SQL Server. Select DECODE(PoleDirection, 'North','N', 'South','S', 'East','E','WEST','W', 'Not Applicable') AS It has been asked on multiple forums, what the EQUIVALENT of DECODE IN SQL SERVER is? Basically, we can achieve the same in SQL Server using Case and IIF statements. It is very handy when it comes to search a variable and return the result based on search. Let’s take some examples of using the DECODE() function to see how it works.I was reading a function in Oracle namely “Decode”. In other words, the DECODE() function never evaluates a search (si+1) when a previous search (si) equals e. , or sn) only before comparing it to the first argument (e), rather than evaluating all search values. The DECODE() function evaluates each search value (s1, s2. DECODE and CASE statements in Oracle both provide a conditional construct, of this form: if A n1 then A1 else if A n2 then A2 else X Everything DECODE can. You can use expressions for the search (s), the result (r), and default value (d) in the DECODE() function. The DECODE() function returns a value with the data type of the first result (r1, r2. dĭ is an expression to return when e does not equal to any searched value s1, s2. Because the first argument equals the second. The r1, r2, …, or rn is the expression to return when e is equal to s. In this example, the DECODE() function compares the first argument (one) with the second argument (also one). Note that s2, s3, … sn are automatically converted to the data type of s1 before comparing. If expr is null, then Oracle returns the result of the first search that is also null. DECODE, NVL, and NVL2 Most of Oracle's built - in functions are. The s1, s2, … or sn is an expression to search for. In a DECODE function, Oracle considers two nulls to be equivalent. CHAPTER 9 DECODE and CASE Whether it is for user presentation, report formatting. PLSQL stands for 'Procedural Language extensions to SQL', and is an extension of SQL that is used in Oracle.PLSQL is closely integrated into the SQL language, yet it adds programming constructs that are not native to SQL. Oracle started with the decode statement and later refined it in Oracle9i. Oracle is a relational database technology developed by Oracle. The syntax is: DECODE ( expression, search, result, search, result. The decode and case functions are used within the Oracle database to. The function automatically converts e to the data type of s1 before comparing. The DECODE function in Oracle allows you to have IF-THEN-ELSE logic in your SQL statements. The first argument e is the value to be searched. ![]() , ) Ĭode language: SQL (Structured Query Language) ( sql ) Arguments e
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