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Mysql how to move fields from one table to another wheel msg:4370532 11:45 am on Oct 4, 2011 (gmt 0) I have a database that got hacked. Resulted in my deleting contents of field A in a database. Have a backup copy of the database from a week ago. If each record has a unique identifier say in field B, how can I do this: From backup, select all field A. Insert into live database, all field A's where field B=field B from backup. TIA!
mark_roach msg:4370541 12:28 pm on Oct 4, 2011 (gmt 0)
I think this will work but have not checked the syntax : update tablea, tableb set tablea.cola=tableb.cola where tablea.colb=tableb.colb mark_roach msg:4370546 12:37 pm on Oct 4, 2011 (gmt 0)
Just realised you have the data in a seperate database. Never done this but I think the following should work : update db1.table, db2.table set db1.table.cola=db2.table.cola where db1.table.colb=db2.table.colb If ir doesn't just dump the table you need from the backup using mysldump and then import it into the original database using a different name and use the SQL in my first post. wheel msg:4370558 1:04 pm on Oct 4, 2011 (gmt 0)
Make backups first huh? :) Thanks, I'll give it a whirl. Firstoption looks the most promising. whoisgregg msg:4370742 8:32 pm on Oct 4, 2011 (gmt 0)
You're probably going to want to learn the "INSERT INTO ... SELECT" syntax: http://dev.mysql.com/doc/refman/5.1/en/insert-select.html [ dev.mysql.com]