Re: How to write such a query - Mailing list pgsql-general

Hi Igor,

> On 18. Sep, 2020, at 19:29, 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.

update x set field1='<some string>' where id=5;

Cheers,
Paul