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The SQL DECODE () function allows you to add procedure if-then-else logic to queries. Let’s see the following example: SELECTDECODE(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).
6 sie 2024 · The DECODE() function is useful in data transformation since it simplifies complex logic by eliminating the use of IF ELSE or CASE statements. The DECODE() function also improves query readability, allowing efficient data manipulation. Let us examine the different use cases of the DECODE() function. Using CASE WHEN in SQL Server, PostgreSQL ...
The DECODE () function evaluates each search value (s1, s2, .., or sn) only before comparing it to the first argument (e), rather than evaluating all search values. In other words, the DECODE () function never evaluates a search (si+1) when a previous search (si) equals e.
8 gru 2016 · Oracle's DECODE is NULL safe, meaning that. DECODE(a, b, c, d, e, f) Translates to this standard SQL expression (which can be used starting with SQL Server 2022): CASE WHEN a IS NOT DISTINCT FROM b THEN c WHEN a IS NOT DISTINCT FROM d THEN e ELSE f END In older SQL Server versions, an emulation using EXISTS and INTERSECT is possible:
DECODE is an advanced function that the Oracle database supports. It is used to work as an IF-THEN-ELSE statement. The DECODE function is supported in the various versions of the Oracle/PLSQL, including, Oracle 12c, Oracle 11g, Oracle 10g and Oracle 9i.
The SQL DECODE function is a database function used for conditional value replacement in a query result. It is primarily used in Oracle Database and a few other database systems. DECODE allows you to compare a value to a set of possible values and return a corresponding result when a match is found.
This Oracle tutorial explains how to use the Oracle / PLSQL DECODE function with syntax and examples. The Oracle / PLSQL DECODE function has the functionality of an IF-THEN-ELSE statement.
