Question

I have the following query:

SELECT SUM(COUNTED) AS TCOUNTED 
    FROM (SELECT COUNTED FROM `clicks`.`t1`
          UNION ALL
          SELECT COUNTED FROM `clicks`.`t2`
          UNION ALL
          SELECT COUNTED FROM `clicks`.`t3`
         ) AS TMP

Where and how do I add a time constraint? I want it to count only between certain dates… Sorry for the MySQL noobness.

Thanks!

Answer 1

SELECT SUM(COUNTED) AS TCOUNTED 
    FROM (SELECT COUNTED FROM `clicks`.`t1` WHERE somedatecol BETWEEN somedate AND somedate
          UNION ALL
          SELECT COUNTED FROM `clicks`.`t2` WHERE somedatecol BETWEEN somedate AND somedate
          UNION ALL
          SELECT COUNTED FROM `clicks`.`t3` WHERE somedatecol BETWEEN somedate AND somedate
         ) AS TMP`

http://dev.mysql.com/doc/refman/5.0/en/select.html