Обсуждение: Delete COLUMN data
Hello all, I need to DELETE all the DATA from 3 columns in my table...what is the BEST way to handle this??? I don't want to DROP the columns just clear out ALL the data in those 3 fields... Thanks...Michelle -- View this message in context: http://www.nabble.com/Delete-COLUMN-data-tf4242917.html#a12073367 Sent from the PostgreSQL - admin mailing list archive at Nabble.com.
How about: UPDATE table_name SET column1 = NULL, column2 = NULL, column3 = NULL > -----Original Message----- > From: pgsql-admin-owner@postgresql.org > [mailto:pgsql-admin-owner@postgresql.org] On Behalf Of smiley2211 > Sent: Thursday, August 09, 2007 10:27 AM > To: pgsql-admin@postgresql.org > Subject: [ADMIN] Delete COLUMN data > > > Hello all, > > I need to DELETE all the DATA from 3 columns in my > table...what is the BEST way to handle this??? I don't want > to DROP the columns just clear out ALL the data in those 3 fields... > > Thanks...Michelle > -- > View this message in context: > http://www.nabble.com/Delete-COLUMN-data-tf4242917.html#a12073367 > Sent from the PostgreSQL - admin mailing list archive at Nabble.com. > > > ---------------------------(end of > broadcast)--------------------------- > TIP 9: In versions below 8.0, the planner will ignore your desire to > choose an index scan if your joining column's datatypes do not > match > -------------------------------------------------------- NOTICE: If received in error, please destroy and notify sender. Sender does not intend to waive confidentiality or privilege.Use of this email is prohibited when received in error.
It is called "update": UPDATE <table_name> SET <column1> = NULL, <column2> = NULL, <column2> = NULL; -----Original Message----- From: pgsql-admin-owner@postgresql.org [mailto:pgsql-admin-owner@postgresql.org] On Behalf Of smiley2211 Sent: Thursday, August 09, 2007 10:27 AM To: pgsql-admin@postgresql.org Subject: [ADMIN] Delete COLUMN data Hello all, I need to DELETE all the DATA from 3 columns in my table...what is the BEST way to handle this??? I don't want to DROP the columns just clear out ALL the data in those 3 fields... Thanks...Michelle -- View this message in context: http://www.nabble.com/Delete-COLUMN-data-tf4242917.html#a12073367 Sent from the PostgreSQL - admin mailing list archive at Nabble.com. ---------------------------(end of broadcast)--------------------------- TIP 9: In versions below 8.0, the planner will ignore your desire to choose an index scan if your joining column's datatypes do not match
hmmm... I was just thinking...maybe using UPDATE to NULL field value would be an option.... Update tblname set field1 = NULL; Thanks...Michelle smiley2211 wrote: > > Hello all, > > I need to DELETE all the DATA from 3 columns in my table...what is the > BEST way to handle this??? I don't want to DROP the columns just clear > out ALL the data in those 3 fields... > > Thanks...Michelle > -- View this message in context: http://www.nabble.com/Delete-COLUMN-data-tf4242917.html#a12073910 Sent from the PostgreSQL - admin mailing list archive at Nabble.com.
THANKS ALL FOR YOUR REPLIES...THIS WORKED JUST FINE. -- View this message in context: http://www.nabble.com/Delete-COLUMN-data-tf4242917.html#a12075308 Sent from the PostgreSQL - admin mailing list archive at Nabble.com.