大于在sql中的情况

Question

How can I use greater than in 'case when' in SQL?

I have the following which works fine, but for equal to 100:

select case (TIMESTAMPDIFF(SECOND,last_active,now())) when 100 then 'True' else 'False' end from sessions where uuid=11 and token='test';

How can I have the same query for (>100)?

Please let me know if you need more clarification!

Thanks

Answer 1

select case when (TIMESTAMPDIFF(SECOND,last_active,now())) > 100 then 'True' else 'False' end 
from sessions where uuid=11 and token='test';

Answer 2

CASE has two forms.

CASE expression WHEN Value THEN Value [ WHEN Value THEN Value ] ELSE Value END

and

CASE WHEN Expression THEN Value [ WHEN Expression THEN Value ] ELSE Value END

You want the latter.

SELECT case WHEN (TIMESTAMPDIFF(SECOND,last_active,now())) > 100 then 'True' else 'False' end 
FROM sessions where uuid=11 and token='test';