SpletIn the first form of CASE, each condition is an expression that should evaluate to a BOOLEAN value (True, False, or NULL). A general expression. In the second form of CASE, each value is a potential match for expr. The value can be a literal or an expression. The value must be the same data type as the expr, or must be a data type that can be ... SpletYou'd need to use a subquery to get the result: select stops, count (*) Total from ( select CASE when Stops in ('1Stop', '1 Stop', '1 stop') then '1-Stop' ELSE Stops END as Stops from yourtable ) d group by stops; See SQL Fiddle with Demo. Or if you don't want to use a subquery, then you could repeat the CASE expression in the GROUP BY:
switch case statement of oracle sql to decide which query to …
Splet03. sep. 2024 · Checking for NULL as the first clause (out of eight) of the CASE, made it run much faster, because once a matching value is found, it drops out of the CASE statement immediately it has done whatever action occurs in that clause - the other (in my case seven) clauses are ignored. Splet09. apr. 2024 · CASE is an expression (not a statement) and cannot be used for control-of-flow like that - not to call commands, not to return more than one column/value, not to be used as a command on its own. It seems to me you can just use IF to raise the error when the dates are equal, otherwise run the inserts. show me quality assurance program
CASE Statement - Oracle
Splet17. avg. 2024 · The SQL CASE statement is one of the most useful conditional constructs available and has a lot of applications for analyzing data with SQL. To practice using … Splet20. apr. 2024 · The following SQL statement will return "Monday" if today is a Monday, otherwise it returns "Not a Monday". SET DATEFIRST 1; -- first day of the week is a Monday SELECT CASE WHEN DATEPART(WEEKDAY,GETDATE()) = 1 THEN 'Monday' ELSE 'Not a Monday' END; The following SQL script does the same, but rather uses the IF …. SpletDefinition and Usage The CASE statement goes through conditions and return a value when the first condition is met (like an IF-THEN-ELSE statement). So, once a condition is true, it … show me quebec