Question

I need to make a view in Oracle that will display all rows from last weekday.

So for Tuesday it should be like this cause I need all entries from Monday:

select * from table_1 where to_char(Mydate,'yyyy-mm-dd') =  to_char(sysdate-**1**,'yyyy-mm-dd');

But if it is Monday then I need all entries from Friday.

select * from table_1 where to_char(Mydate,'yyyy-mm-dd') =  to_char(sysdate-**3**,'yyyy-mm-dd');       

How can I make one view that will always display correct rows from last weekday?

Answer 1

SELECT  *
FROM    table_1
WHERE   mydate >= SYSDATE - CASE WHEN TO_CHAR(SYSDATE, 'D') > 6 THEN 3 ELSE 1 END
        AND mydate < SYSDATE - CASE WHEN TO_CHAR(SYSDATE, 'D') > 6 THEN 3 ELSE 1 END + 1