UPDATE table SET col = (SELECT ...)
| От | Vangelis-Maria Tougia |
|---|---|
| Тема | UPDATE table SET col = (SELECT ...) |
| Дата | |
| Msg-id | LPBBJCOFLNPHLEKEIJJFKEMACCAA.tougias@cytanet.com.cy обсуждение исходный текст |
| Ответы |
Re: UPDATE table SET col = (SELECT ...)
|
| Список | pgsql-sql |
Hi,
I found follwing email sent to you in internet.
I am interested in same issue myself.
Did you finally found out any more information about how to Update a column of a table by selecting value from another table?
Hello,
If I understand the SQL references I have read, UPDATEs are allowed to
pull data from SELECT statements, something like
UPDATE table SET col1 = (SELECT val1 FROM table WHERE id = 34),
SET col2 = (SELECT val2 FROM table WHERE id = 34)
WHERE id = 35;
However, the PostgreSQL parser chokes on the 'SELECT'. The
documentation says
UPDATE table SET column = expression [, ...]
[ FROM fromlist ]
[ WHERE condition ]
expression = A valid expression or value to assign to column.
I don't know exactly how to interpret `valid expression'.
--
Eric Marsden
emarsden @ mail.dotcom.fr
It's elephants all the way down
If I understand the SQL references I have read, UPDATEs are allowed to
pull data from SELECT statements, something like
UPDATE table SET col1 = (SELECT val1 FROM table WHERE id = 34),
SET col2 = (SELECT val2 FROM table WHERE id = 34)
WHERE id = 35;
However, the PostgreSQL parser chokes on the 'SELECT'. The
documentation says
UPDATE table SET column = expression [, ...]
[ FROM fromlist ]
[ WHERE condition ]
expression = A valid expression or value to assign to column.
I don't know exactly how to interpret `valid expression'.
--
Eric Marsden
emarsden @ mail.dotcom.fr
It's elephants all the way down
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