I'm a bit nervous about running an update-inner join type query with postgres since it's different from MySQL and SQL Server that I"m used to (which is much easier). Last time I attempted this with Postgres, I ended up updating over a million rows, not the intended few hundred. Please help me with this query.
The following queries retrieves exactly the rows I need to update:
select * from finst_t f
inner join store_t s on f.store_id=s.id
inner join loc_t l on s.loc_id=l.id
where l.id=201327 and file_vgroup ilike 'sarp%'
In MySQL or SQL Server, I would do the following for the update-inner join:
update finst_t f
inner join store_t s on f.store_id=s.id
inner join loc_t l on s.loc_id=l.id
set l.id=123456
where l.id=201327 and file_vgroup ilike 'sarp%'
I know this is not the style used for postgres but last time I tried to build up a query with Postgres after reading the documentation, it was a disaster. Please help me build a query to do this in Postgres.
2nd question, I'm using Postgres 7.3. In later versions, do they have the same style of update-inner join queries as MySQL and SQL server?
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UPDATE [ ONLY ] table [ [ AS ] alias ]
SET { column = { expression | DEFAULT } |
( column [, ...] ) = ( { expression | DEFAULT } [, ...] ) } [, ...]
[ FROM fromlist ]
[ WHERE condition ]
[ RETURNING * | output_expression [ AS output_name ] [, ...] ]
update only loc_t l set l.id=123456
from finst_t f, store_t s
where f.store_id=s.id and s.loc_id=l.id and l.id=201327 and file_vgroup ilike 'sarp%'
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by: gheistPosted on 2007-06-06 at 01:52:30ID: 19223518
Your query is not SQL standards-conformant. You have to specify table name for join-s.