Question

I have two tables with the same structure and with slightly different rows – Table A, and Table B.
I would like to extract all the rows that are contained in table A but not in Table B.
CAn you help me do that?

By the way – Table A is in definition form, it does not previously created.

And additionaly – I have 15 sql scripts to analyse.
I would like to find some software that can help me with visualization of the entire proces (composed of 15 sql scripts).
Can you suggest something good?

Answer 1

try

SELECT * FROM Table_A
EXCEPT
SELECT * FROM Table_B

See http://en.wikipedia.org/wiki/Set_operations_%28SQL%29#EXCEPT_operator