[GENERAL] Set operator.

Dear all,

What set operators other then UNION do PG have?

In particular, I am interested in the MINUS or equivalent operator. e.g

table1:

value1
1
2
3
4
5
6
7
8
9

table2:

value2
1
3
5
7
9

SELECT table1.value1 FROM table1 MINUS table2.value2 FROM table2;

result:
2
4
6
8

I have PG 6.4.0 so please specify what version of PG might have this
functionality... also, can anybody offer hints as to how to implement such
functionality if necessary?

Regards,

Stuart.

+-------------------------+--------------------------------------+
| Stuart Rison | Ludwig Institute for Cancer Research |
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| Tel. (0171) 878 4041 | London, W1P 8BT, UNITED KINGDOM. |
| Fax. (0171) 878 4040 | stuart(at)ludwig(dot)ucl(dot)ac(dot)uk |
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