Re: work on some tables in the same time. - Mailing list pgsql-sql

Thanks, but:

testdb=#CREATE VIEW tableselecttemp AS SELECT DISTINCT f1, f2, f3 FROM
table1_n;
ERROR:  DISTINCT not supported in views

Jerome.


Ian Turner wrote:
> 
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> > I want to execute this query on some table2 in the same time :
> >
> > INSERT INTO table2_n(f1, f2, f3)
> >       SELECT DISTINCT f1, f2, f3 FROM table1_n ;
> 
> One way would be to do:
> BEGIN
> CREATE VIEW tableselecttemp AS
>         SELECT DISTINCT f1, f2, f3 FROM table1_n;
> INSERT INTO table2_n(f1, f2, f3) SELECT * FROM tableselecttemp;
> INSERT INTO table2  (f1, f2, f3) SELECT * FROM tableselecttemp;
> DROP VIEW tableselecttemp;
> ROLLBACK;
> 
> Alternatively, run the select query twice without the temporary
> view. You'll have to try it both ways, on a realistic data set, to see
> which is faster for you.
> 
> Ian
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