How to compare dates in SQL stored procedure?

Question

I want to query the database within a stored procedure with the following SQL statement:

SELECT date1 FROM table INTO dates
WHERE date1 < CONVERT(VARCHAR(8), GETDATE(), 112)
AND date1 > CONVERT(VARCHAR(8), DATEADD(DAY, -4, GETDATE()), 112);

I get an error on the WHERE clause, what am I doing incorrectly?

Answer 1

Assuming date1 is datetime type then Use Between

SELECT date1  INTO dates FROM table
WHERE date1 BETWEEN  CONVERT(VARCHAR(8), DATEADD(DAY, -4, GETDATE()), 112) AND
                     CONVERT(VARCHAR(8), GETDATE(), 112);

if date1 is not datetime, then convert it to then Use Between

   SELECT date1 INTO dates FROM table 
    WHERE CONVERT(VARCHAR(8), date1, 112) BETWEEN  CONVERT(VARCHAR(8), DATEADD(DAY, -4, GETDATE()), 112) AND
                         CONVERT(VARCHAR(8), GETDATE(), 112);

Answer 2

The syntax erro is because the INTO is wrong.

1) But as @Jonathan has mentioned , the funcitions GETDAT, CONVERT, DATEADD aren't native and not exists at INFORMIX database. Unless you have create it...
2) The "dates" should be a variable at your SPL.

3) The SELECT should return only 1 row....

SELECT date1 INTO dates FROM table 
WHERE date1 < CONVERT(VARCHAR(8), GETDATE(), 112)
AND date1 > CONVERT(VARCHAR(8), DATEADD(DAY, -4, GETDATE()), 112);

This should be a valid Informix syntax:

SELECT date1 INTO dates FROM table 
WHERE date1 < today
AND date1 > today - 4 units day ;

For more information about the syntax , please check at the IBM Knowledge Center