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15 wrz 2008 · If you need to write just one condition, then iif() is sufficient, however if you want to write multiple iif() conditions within one statement then you will have to use `case' statement as demonstrated in above responses. Here is an example for your reference.
12 wrz 2019 · TRY_PARSE isn't a built in function. Also tried a few variations of: SELECT SUBSTRING(Text, 46, 4) AS Year, CASE WHEN CAST(SUBSTRING(Text, 46, 4) AS INT) IS NULL THEN 'Error'. WHEN CAST(Year AS INT) IS NULL < YEAR(GETDATE()) THEN 'In the past'. ELSE 'In the future'. END TEXT.
28 maj 2024 · We can use either a CASE statement or an IIF() function to implement IF-THEN logic in SQL. In this tutorial, we’ll explore how to implement IF-THEN logic in SQL across various dialects such as SQL Server, MySQL, and PostgreSQL.
17 sty 2012 · You need dynamic SQL: CREATE OR REPLACE FUNCTION foo(lastcontact timestamptz) RETURNS void AS $func$ DECLARE myrec record; mycond boolean; BEGIN FOR myrec IN SELECT * FROM tabel ORDER BY colorlevel, volgnummer LOOP IF myrec.conditie ~~ '%lastcontact %' THEN -- special case for input param myrec.conditie := replace (myrec.conditie , 'lastcontact ...
Let’s take some examples of using the SQL Server IIF() function. A) Using SQL Server IIF() function with a simple example. This example uses the IIF() function to check if 10 < 20 and returns the True string: SELECT IIF (10 < 20, 'True', 'False') Result; Code language: SQL (Structured Query Language) (sql) Here is the result:
12 wrz 2022 · Using a Boolean Function in an Argument. The most common Boolean function found in a T-SQL IF statement is the EXISTS function. When combined with a query, this function returns true when the query returns at least one row. It returns false when the query returns no rows.
3 wrz 2024 · Imposes conditions on the execution of a Transact-SQL statement. The Transact-SQL statement that follows an IF keyword and its condition is executed if the condition is satisfied: the Boolean expression returns TRUE.
