If anyone could tell me what I am doing wrong here, I would greatly appreaciate it. Have the following tables: table1: id, count table2: id, count, period_count, date, timestamp Trying to do the following; get all rows from table 1 and insert them into table2 while setting period_count to count.table1 minus the most recent entry for that id in count.table2, then set the date field to the previous day. Here goes: INSERT INTO table1 (id,count,period_count,date) SELECT id,count FROM table1, (count.table1 - (SELECT count FROM table2 WHERE MAX(timestamp) AND id.table2=id)) AS period_count, date='TO_DAYS(NOW() -1)';
Sorry if this is easy, but I could not find an example of any mathematic functions while doing an INSERT ... SELECT. Thanx, Roy
