Hi, I have a table named "famille" whose structure and content is :
famille_code | famille_mere_famille_code | famille_libelle | famille_niveau --------------+---------------------------+-------------------+------------- --- 000000 | | Mhre | 0 I00001 | 000000 | Composants | 1 IN0001 | I00001 | Micro-processeurs | 2 IN0002 | I00001 | Mimoires RAM | 2 INS001 | IN0002 | DDR-SDRAM | 3 INS002 | IN0002 | DDR2-SDRAM | 3 INS003 | IN0002 | SDR-SDRAM | 3 IN0003 | I00001 | Cartes mhres | 2 IN0004 | I00001 | Disques durs | 2 IN0005 | I00001 | Cartes graphiques | 2 IN0006 | I00001 | Cartes son | 2 IN0007 | I00001 | Riseau | 2 IN0008 | I00001 | Lecteurs CD/DVD | 2 IN0009 | I00001 | Graveurs CD/DVD | 2 IN0010 | I00001 | Bontiers | 2 I00002 | 000000 | Piriphiriques | 1 IN0011 | I00002 | Cli USB | 2 IN0012 | I00002 | Modems | 2 IN0013 | I00002 | Imprimantes | 2 (19 rows) The first col is the family id and the second is the mother family id. I would get a list of all families that are never in the col n°2, so the families that aren't node but leaf. The query, i made was "SELECT * FROM famille WHERE famille_code NOT IN (SELECT DISTINCT famille_mere_famille_code FROM famille);" But the DB returns 0 records instead of 15. If i use a list instead of a subquery it works normaly but it's not easy to manage it like this. So if anyone can help me please ... ---------------------------(end of broadcast)--------------------------- TIP 2: Don't 'kill -9' the postmaster
