Обсуждение: How to do auto numbering on INT column

HI
I have a simple table created using PGAdmin III. How do i do a auto
numbering on a column SYMBOL_ID?
My table is
CREATE TABLE "SYMBOL"
(
  "SYMBOL_ID" int4 NOT NULL,
  "SYMBOL2EXCHANGE" int2 NOT NULL,
  "SYMBOL_ALIAS" text[],
  "RELATED_SYMBOLS_OTHER_EXCHANGES" int8[],
  "SYMBOL_NAME" text,
  "COMPANY_NAME" text,
  "SYMBOL2SECTOR" int2,
  "SYMBOL2INDUSTRY" int4,
  "STOCK_SUMMARY" text
)

Thanks

Seede

> HI
> I have a simple table created using PGAdmin III. How do i do a auto
> numbering on a column SYMBOL_ID?
> My table is
> CREATE TABLE "SYMBOL"
> (
>   "SYMBOL_ID" int4 NOT NULL,
>   "SYMBOL2EXCHANGE" int2 NOT NULL,
>   "SYMBOL_ALIAS" text[],
>   "RELATED_SYMBOLS_OTHER_EXCHANGES" int8[],
>   "SYMBOL_NAME" text,
>   "COMPANY_NAME" text,
>   "SYMBOL2SECTOR" int2,
>   "SYMBOL2INDUSTRY" int4,
>   "STOCK_SUMMARY" text
> )

Use column type SERIAL, or, if you want to fine tune things,
use sequences:
http://www.postgresql.org/docs/8.1/static/sql-createsequence.html
(in fact, SERIAL does define a sequence behind the scenes for you).

Bye, Chris.

--

Chris Mair
http://www.1006.org

Junkone wrote:
> CREATE TABLE "SYMBOL"
> (
>   "SYMBOL_ID" int4 NOT NULL,
>   "SYMBOL2EXCHANGE" int2 NOT NULL,
>   "SYMBOL_ALIAS" text[],
>   "RELATED_SYMBOLS_OTHER_EXCHANGES" int8[],
>   "SYMBOL_NAME" text,
>   "COMPANY_NAME" text,
>   "SYMBOL2SECTOR" int2,
>   "SYMBOL2INDUSTRY" int4,
>   "STOCK_SUMMARY" text
> )

I think you'll want to remove all those double-quotes. They make your
table and column names case sensitive. You'd need to quote these in your
queries as well, if you stay with what pgadmin (apparently) created.

--
Alban Hertroys
alban@magproductions.nl

magproductions b.v.

T: ++31(0)534346874
F: ++31(0)534346876
M:
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A: Postbus 416
    7500 AK Enschede

// Integrate Your World //

Junkone wrote:
> HI
> I have a simple table created using PGAdmin III. How do i do a auto
> numbering on a column SYMBOL_ID?
> My table is
> CREATE TABLE "SYMBOL"
> (
>   "SYMBOL_ID" int4 NOT NULL,
>   "SYMBOL2EXCHANGE" int2 NOT NULL,
>   "SYMBOL_ALIAS" text[],
>   "RELATED_SYMBOLS_OTHER_EXCHANGES" int8[],
>   "SYMBOL_NAME" text,
>   "COMPANY_NAME" text,
>   "SYMBOL2SECTOR" int2,
>   "SYMBOL2INDUSTRY" int4,
>   "STOCK_SUMMARY" text
> )
>
If you can, the easy way is to recreate the table using a serial
datatype instead of int4.

See the docs at
http://www.postgresql.org/docs/8.1/interactive/datatype.html#DATATYPE-SERIAL

Otherwise this also shows the long way to do it.


HTH,

  Brent Wood