Sql Case Statement when is not null - Stack Overflow
2012年2月1日 · CASE x WHEN null THEN is the same as CASE WHEN x = null THEN. But nothing equals null in that way. This means that you are always getting the ELSE part of your CASE statement. And that means that you are trying to concatenate a string with NULL, which always yields NULL. You need CASE WHEN x IS NULL THEN instead...
sql server - CASE statement with IS NULL and NOT NULL
2012年7月11日 · Yes - I did try CASE WHEN (ID IS NULL) THEN 'YES' ELSE 'NO' END AS ID_Value But I am looking for some other better approach something like IF(ID IS NULL, 'YES', 'NO') AS ID_Value in the Ms Sql, so that everything can be …
sql - CASE Statement using IS NULL and IS NOT NULL - Stack …
2017年1月27日 · Both of these clauses are looking for NULL values, either being null or not null and variations of this.,CASE WHEN [FULL_TELEPHONE_NUMBER] IS NOT NULL AND [EMAIL] IS NOT NULL THEN 'Phone Number AND Email Address Available' WHEN [FULL_TELEPHONE_NUMBER] IS NOT NULL AND [EMAIL] IS NULL THEN 'Phone Number …
SQL Server Case Statement when IS NULL - Stack Overflow
2013年7月26日 · case when b.[stat] is null then (c.[event date]+10) -- type datetime else '-' -- type varchar end as [date] You need to select one type or the other for the field, the field type can't vary by row. The simplest is to remove the ELSE '-' and let it implicitly get the value NULL instead for the second case.
mysql - Conditional NOT NULL case SQL - Stack Overflow
If reply.replies is null, the expression is shortcut to NULL IFNULL then takes the 2nd parameter (1) and gives that as a result when it happens. For other cases where you do need to compare to NULL, this will help you to work with MySQL.
sql server - Using IS NULL in CASE Expression in WHERE Clause ...
2017年8月1日 · WHERE SupervisorApprovedBy = CASE WHEN @UserRole = 'Analyst' THEN NULL ELSE SupervisorApprovedBy END I cannot use = for NULL. Tested and does not work. I would want all rows returned including those where SupervisorApprovedBy IS NOT NULL.
T-SQL CASE Clause: How to specify WHEN NULL - Stack Overflow
2013年3月15日 · The issue is that NULL is not considered to be equal to anything even not to itself, but the strange part is that is also not not equal to itself. Consider the following statements (which is BTW illegal in SQL Server T-SQL but is valid in My-SQL, however this is what ANSI defines for null, and can be verified even in SQL Server by using case ...
sql - MYSQL Case in select statement for checking null - Stack …
2022年12月22日 · When NULL, the CASE expression misses the entry and returns 'Forth Coming Titles'; since it is not NULL the COALESCE returns the same. – Diego-MX Commented Jan 8, 2015 at 16:53
sql - how to catch NULL values using case statement - Stack …
2010年1月18日 · here in this query I want to replace the values in Person.Contact of Adventureworks database with some new values. The below query case statement is working fine for other values but I am not able to change the values those are in NULL. I am using SQL Server. Any help is appreciated.
sql - Case statement for 'where [value] is not null' - Stack Overflow
2015年7月14日 · I want the return of the case statement to be a 'is not null' expression for a where clause. This is what I have: INSERT INTO table1 (Id) ( SELECT DISTINCT AId AS Id FROM table2 As t2 INNER JOIN table3 ON ( ... ) WHERE CASE WHEN test_value <> '' THEN (another_value IS NOT NULL) END ) This gives the error: