If you are running version 4.1, you can use a sub-select. INSERT INTO table2 SELECT table1 WHERE IDs IN (SELECT IDs FROM /* this may be the one with left joins */ table3)
Thanks Emery ----- Original Message ----- From: "Nobody" <[EMAIL PROTECTED]> To: "PAUL MENARD" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]> Sent: Friday, October 10, 2003 14:40 Subject: Re: [MYSQL] Combine tables from two different systems > Hi Paul > > If all the tables have a primary key set, you can do an INSERT IGNORE from > the tables in System A to the tables in System B (either manually or write a > script). > Any rows form System A that already have a System B equivalent will be > silently dropped and only those that do not have an equivalent will be > written. > > e.g. INSERT IGNORE INTO system_b.table_n (columns) > SELECT columns FROM system_a.table_n > > HTH > Rory McKinley > Nebula Solutions > 082 857 2391 > [EMAIL PROTECTED] > "There are 10 kinds of people in this world, > those who understand binary and those who don't" (Unknown) > ----- Original Message ----- > From: "PAUL MENARD" <[EMAIL PROTECTED]> > To: <[EMAIL PROTECTED]> > Sent: Thursday, October 09, 2003 5:21 PM > Subject: [MYSQL] Combine tables from two different systems > > > > Hello All, > > > > I have two system, we shall call then system A (OLD) and system B (NEW), > running MySQL that I want to combine their tables. The system B is the newer > and most accurate. The table structure is the exact same. Some of the rows > in system B (NEW) tables are also in system A (OLD). For those rows I want > to leave the system B data unchanged. > > > > I have a select statement with a left join that will tell me the rows that > are in system A but not in system B (the target). Question is how to I write > a SQL statement to also insert these rows? > > > > System information. > > > > Windows NT4 (System A), Windows server 2003 (System B). > > MySQL 3.23.42-nt running on both systems. > > > > Paul > > > > > -- > 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]
