union the rows from select 1 not in select 2?
Need to find out which rows from select 1 are not present in select 2, but is it possible to make som kind of union that only returns the overlapping rows from the two selects? Sincerely Victor -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: union the rows from select 1 not in select 2?
for example: Table1 contains: A and B and C Table2 contains: B and C and D all varchars The query: select A, B, C, '' as D from Table1 UNION select '' as A, B, C, D from Table2 if the values are no varchar but for example smallints then you replace the '' with 0 or whatever wich value (eg NULL). bye hans van dalen At 15:37 15-10-03 +0200, you wrote: Need to find out which rows from select 1 are not present in select 2, but is it possible to make som kind of union that only returns the overlapping rows from the two selects? Sincerely Victor -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED] -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
Re: union the rows from select 1 not in select 2?
Of course, But you still can see the table structure??? Hans At 16:05 15-10-03 +0200, you wrote: 2003-10-15 kl. 15.51 skrev Hans van Dalen: Table1 contains: A and B and C Table2 contains: B and C and D all varchars The query: select A, B, C, '' as D from Table1 UNION select '' as A, B, C, D from Table2 if the values are no varchar but for example smallints then you replace the '' with 0 or whatever wich value (eg NULL). Might be me beeing tired since its late afternoon, but doesnt the SQL above require that I know which rows are missing in the two tables? What I want to do is to union the result +---++---+ | id | betegnelse | enhed | +---++---+ | 00046 | 838718001064311911 | 5 | | 01330 | 537895001064317190 | 5 | +---++---+ with +---++---+ | id | betegnelse | enhed | +---++---+ | 00046 | 838718001064311911 | 5 | | 00120 | 641725001064311948 | 5 | | 01330 | 537895001064317190 | 5 | +---++---+ and have the new result +---++---+ | id | betegnelse | enhed | +---++---+ | 00120 | 641725001064311948 | 5 | +---++---+ which is the row from select 1 thats not present in select 2 Sincerely Victor -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe:http://lists.mysql.com/[EMAIL PROTECTED]
