What database are you using? The following should work with MySL (and maybe others)

If tableA was empty or both tables didn't have any overlapping primary key values, then this would work, but I'm assuming there's a primary key in there that would mess things up.
INSERT INTO tableA SELECT * FROM tableB

If you have an auto incrementing primary key 'id' as the first field in both tables...
INSERT INTO tableA SELECT 0, field1, field2, field3, etc...  FROM tableB

If you want to overwrite any conflicting records in tableA with the records from tableB...
REPLACE INTO tableA SELECT * FROM tableB

HTH


On 21/06/2014 15:57, Mark Smith wrote:
I have two tables A and B, both with the same structure (about 50 columns
each). I would like to combine them into a single table (ie. rows from Table
A followed by rows from Table B). Does anyone know of an SQL statement that
will do that?

Thanks



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