Question

I have two tables (let’s call them A and B) with same structure and i need to synchronize data in them…

There’s one primary key field, with same value in both tables, and several fields with value in table A and null (or obsolete value that need to be replaced with current value from table A) in table B… I need to copy value from table A to table B.

Is there any easy way (other than replication) to do this in mySQL 4.1?

thanks in advance

Answer 1

Try this –

UPDATE table_b b, table_a a 
SET b.field1 = a.field1, b.field2 = a.field2  
WHERE b.primary_key = a.primary_key 

add the fields as required.