Question

q1: given a table : ID, Date, Status. Write a SQL query which receives @ID @Date and retrieve the status the person with that id on that date or the last status not later than that @date if that date doesn’t exist.

I have tried to write queries for above questions. I would appreciate you remarks:

SELECT TOP (1) status from MyTable AS T
WHERE T.Date <= @date && T.id = @id
ORDER BY T.Date

Thanks guys

Answer 1

You need to use AND instead of &&, and order by date descending:

SELECT TOP 1 status 
from MyTable AS T 
WHERE T.Date <= @date 
    and T.id = @id 
ORDER BY T.Date desc