Re: How to write such a query - Mailing list pgsql-general
Are you looking to arbitrarily update the field in the fifth row, or can the row that needs to be updated be isolated by some add'l attribute? What's the use case?
On Fri, Sep 18, 2020 at 1:27 PM Igor Korot <ikorot01@gmail.com> wrote:
Hi,
Consider following
[code]
CREATE TABLE X(id INTEGER PRIMARY KEY, field1 char(50), field2 int);
CREATE TABLE Y(id INTEGER PRIMARY KEY, field1 char, field2 double(10, 2));
SELECT X.field1, Y.field2 from X, Y WHERE X.id = Y.id;
[/code]
Assuming that the SELECT return 10 rows, I want to update X.field1
in row 5.
How do I write a WHERE clause in the
[code]
UPDATE X.field1 SET X.field1 = '<some_string>' WHERE....
[/code]
Thank you.
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