Re: Need help with update

In response to A B :
> Hello.
> My SQL is a little rusty,
>
> With these tables (where id is unique)
>
> Table Y:
> a | id
> ----+---
> 10 | 1
> 20 | 2
> 30 | 3
>
> Table X:
>
> a | id
> ---+---
> 1 | 1
> 2 | 2
> 3 | 3
>
> Now I want to update each row in the Y table and set the a value to
> the corresponding a value that is found in the X table, matched on the
> id.
>
> This means that in the end, the Y table should contain the same
> values as the X table in this case.

update y set a=x.a from x where y.id=x.id;

HTH, Andreas
--
Andreas Kretschmer
Kontakt: Heynitz: 035242/47150, D1: 0160/7141639 (mehr: -> Header)
GnuPG: 0x31720C99, 1006 CCB4 A326 1D42 6431 2EB0 389D 1DC2 3172 0C99