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The NULLIF function will convert any column value with only whitespace into a NULL value. Works for T-SQL and SQL Server 2008 & up. SELECT [column_name] FROM [table_name] WHERE NULLIF([column_name], '') IS NULL
SELECT CASE WHEN ColB = 'March' THEN (Select ColA FROM tablename WHERE ColB = 'January') END FROM tablename Or can be done without a CASE would be. SELECT (SELECT colA FROM tablename WHERE colB = 'January') FROM tablename WHERE colB = 'March' See example of second running here
28 maj 2024 · In this article, we explored different options for executing IF-THEN logic in a SQL SELECT statement. These options include using CASE , IIF() , and CHOOSE() . Furthermore, if we want a query that’s used in almost every dialect, we must choose the CASE statement.
31 sty 2018 · CASE WHEN (SELECT 1 WHERE (1=1)) = 1 THEN 1 ELSE 0 END. My subquery is returning one row and hence compared to 1. This leads my CASE WHEN to produce the 1 output. Even if I set the subquery to return no rows like the sample below, the CASE statement returns the 0 result: SELECT.
30 paź 2023 · The SQL IF statement in SELECT queries is utilized to introduce conditional logic, allowing for more dynamic and flexible data retrieval. Essentially, it lets you specify conditions to dictate which data should be fetched or how it should be displayed.
31 sty 2024 · IS NULL Operator in SQLIS NULL Operator in SQL is used to test for empty or missing values in a column. It checks if the specified expression evaluates to NULL, if it evaluates to NULL, it returns TRUE; otherwise, it returns FALSE.
1 wrz 2019 · You can use this after add column in power query editor: if ColumnA = 'yourvalue' then ColumnA. Else ColumnC . This save your column before do all on data 🙂 . if this help you mark this as a solution! Thank you
