Question

Does the case statement work like “if – else if” or like “if – if”?

Let’s say, I write

...ORDER BY CASE WHEN agentid=@agentid THEN 4 WHEN status='GOLD' THEN 3 WHEN status='SILVER' THEN 2 WHEN status='BASIC' THEN 1 END DESC

Will an entry where the agentid is @agentid and the status is GOLD be 7 or 4 ?

Answer 1

Effectively an else-if; The CASE statement will return the 1st matching value, so when agentid=@agentid is satisfied evaluations stops without examining the other WHEN conditions & 4 will be returned.