Can I use a query with UPDATE on its SET?

Hi Ho!

Since I can do:

INSERT INTO table (SELECT a_transaction.*);

I am wondering whether I can do:

UPDATE table SET (SELECT a_transaction.*) WHERE primary_key = (SELECT a_transaction.primary_key);

instead of:

DELETE FROM table WHERE primary_key = (SELECT a_transaction.primary_key);
INSERT INTO table (SELECT a_transaction.*);

Can I? I am using PostgreSQL 8.3.5. I get the feel that I cannot do so from reading the manual.

Thank you.

Best regards,
Eus (FSF member #4445)

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