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* new calculated column
@ 2002-09-05 16:53 andres javier garcia garcia <andresjavier.garcia@wanadoo.es>
0 siblings, 1 reply; 4+ messages in thread
From: andres javier garcia garcia @ 2002-09-05 16:53 UTC (permalink / raw)
To: pgsql-sql
Hi;
I've got a table with two fields and about 3000 rows, the second one is a
character field, what can have about twenty different values; of course these
values are repeated a lot of times in the table. I need to create a new
column of type integer, whose value depens on the character fields. The
values of the new column are not important, the important thing is who can I
create this column and assign a different integer to a different char value
in the other column.
Thanks
--------------
Javier
^ permalink raw reply [nested|flat] 4+ messages in thread
* new calculated column
@ 2002-09-05 16:58 andres javier garcia garcia <andresjavier.garcia@wanadoo.es>
0 siblings, 1 reply; 4+ messages in thread
From: andres javier garcia garcia @ 2002-09-05 16:58 UTC (permalink / raw)
To: pgsql-sql
Hi;
I've got a table with two fields and about 3000 rows, the second one is a
character field, what can have about twenty different values; of course these
values are repeated a lot of times in the table. I need to create a new
column of type integer, whose value depens on the character fields. The
values of the new column are not important, the important thing is who can I
create this column and assign a different integer to a different char value
in the other column.
Thanks
--------------
Javier
-------------------------------------------------------
^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: new calculated column
@ 2002-09-05 18:49 mallah@trade-india.com
parent: andres javier garcia garcia <andresjavier.garcia@wanadoo.es>
0 siblings, 0 replies; 4+ messages in thread
From: mallah@trade-india.com @ 2002-09-05 18:49 UTC (permalink / raw)
To: andresjavier.garcia@wanadoo.es; +Cc: pgsql-sql
HI.
simple (tedious) solution would be do fire 20 sqls.
update tabel set f1=<some int 1> where f2='some varchar1';
update tabel set f1=<some int 2> where f2='some varchar2';
update tabel set f1=<some int 3> where f2='some varchar3';
incase there is some the integer is a function of varchar
u may translate to the corresponding SQL.
regds
mallah.
> Hi;
>
> I've got a table with two fields and about 3000 rows, the second one is a character field, what
> can have about twenty different values; of course these values are repeated a lot of times in
> the table. I need to create a new column of type integer, whose value depens on the character
> fields. The values of the new column are not important, the important thing is who can I create
> this column and assign a different integer to a different char value in the other column.
> Thanks
> --------------
> Javier
>
> -------------------------------------------------------
>
> ---------------------------(end of broadcast)--------------------------- TIP 4: Don't 'kill -9'
> the postmaster
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^ permalink raw reply [nested|flat] 4+ messages in thread
* Re: new calculated column
@ 2002-09-09 14:01 Viacheslav N Tararin <taras@dekasoft.com.ua>
parent: andres javier garcia garcia <andresjavier.garcia@wanadoo.es>
0 siblings, 0 replies; 4+ messages in thread
From: Viacheslav N Tararin @ 2002-09-09 14:01 UTC (permalink / raw)
To: andres javier garcia garcia <andresjavier.garcia@wanadoo.es>; pgsql-sql
For implicit modification you can use a trigger on the table. If you
wan't store this data, you can use view.
andres javier garcia garcia ?????:
>Hi;
>
>I've got a table with two fields and about 3000 rows, the second one is a
>character field, what can have about twenty different values; of course these
>values are repeated a lot of times in the table. I need to create a new
>column of type integer, whose value depens on the character fields. The
>values of the new column are not important, the important thing is who can I
>create this column and assign a different integer to a different char value
>in the other column.
>Thanks
>--------------
>Javier
>
>---------------------------(end of broadcast)---------------------------
>TIP 3: if posting/reading through Usenet, please send an appropriate
>subscribe-nomail command to majordomo@postgresql.org so that your
>message can get through to the mailing list cleanly
>
>
>
>
^ permalink raw reply [nested|flat] 4+ messages in thread
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2002-09-05 16:53 new calculated column andres javier garcia garcia <andresjavier.garcia@wanadoo.es>
2002-09-09 14:01 ` Viacheslav N Tararin <taras@dekasoft.com.ua>
2002-09-05 16:58 new calculated column andres javier garcia garcia <andresjavier.garcia@wanadoo.es>
2002-09-05 18:49 ` mallah@trade-india.com
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