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26 lip 2013 · In this situation you can use ISNULL() function instead of CASE expression . ISNULL(B.[STAT], C.[EVENT DATE]+10) AS [DATE]
11 lip 2012 · Is there any better way to write the lines below in SQL Server 2005? CASE WHEN (ID IS NULL) THEN 'YES' WHEN (ID IS NOT NULL) THEN 'NO' END AS ID_Value,
30 paź 2023 · SQL CASE statements coupled with IS NULL/IS NOT NULL checks provide a robust mechanism for handling NULL values in conditional business logic. To recap the key guidelines: Thoroughly check for possible NULLs in every branch of CASE statements. Avoid relying solely on ELSE/default cases to handle NULLs.
27 sty 2017 · You can use either CASE structure to do this, but you can't call a function if you use the CASE fieldname WHEN approach, so you can either use CASE WHEN fieldname condition: CASE WHEN color = 'black' THEN 'b'. WHEN color = 'red' THEN 'r'. WHEN color IS NULL THEN 'empty'. else 'n/a'.
There are 3 possible ways to deal with nulls in expressions: using IsNull, Coalesce or CASE. I've explained these under separate headings below! The ISNULL Function. This function substitutes a given value when a column is null. The syntax is:
6 cze 2024 · MS SQL provides a function ISNULL to check for null values: SELECT id, name FROM Department WHERE ISNULL (code, '') = '' OR TRIM (code) = ''; The ISNULL function in MS SQL takes two arguments: the first is a value or column name, and the second is the default value if the first argument is null.
27 sty 2017 · You can use nullif(col,'') to return null when the value of the first parameter is equal to the second parameter. ,CASE. WHEN nullif([FULL_TELEPHONE_NUMBER],'') IS NOT NULL AND nullif([EMAIL],'') IS NOT NULL. THEN 'Phone Number AND Email Address Available'.
