add serial no

[Keith]

Dear All,

Someone can help me to solve the below problems

1. I create a table for a period of time, there is huge records already posted.
I would like to alter table and add serial primary key on that table. It's impossible to add serial no by hand. Please adv how can I add the serial number automatically.

2. Is there any library to translate digit number to English, I mean translate '1234' to 'one thousand two hundred thirty four'.. Pls help.

regards

[Uwe C. Schroeder]

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Post by Keith
Dear All,
Someone can help me to solve the below problems
1. I create a table for a period of time, there is huge records already
posted. I would like to alter table and add serial primary key on that
table. It's impossible to add serial no by hand. Please adv how can I add
the serial number automatically.

Create a table with the same structure as your original table, just add a

sid int4 serial

column to it. (sid can be any column name you want it to be) The serial column
has to be at the end!
Then do a
INSERT INTO <new table> SELECT FROM <old table>

The serial column will automatically be set to 1,2,3,4,5 etc.
After that check if all the data made it to the new table and then you can
drop the old table and rename the new table to the name of the old table.

As usual I'd make a backup of the original table before doing all this.

Post by Keith
2. Is there any library to translate digit number to English, I mean
translate '1234' to 'one thousand two hundred thirty four'.. Pls help.

Sorry, can't help with that one.


UC

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[Gaetano Mendola]

Post by Keith
Dear All,
Someone can help me to solve the below problems
1. I create a table for a period of time, there is huge records already posted.
I would like to alter table and add serial primary key on that table.
It's impossible to add serial no by hand. Please adv how can I add the
serial number automatically.

Just to inform you that with the future 8.0 postgresl version you can
do this task easily:

kalman=# select * from test;
field_1
---------
3
5
7
6
8
(5 rows)

kalman=# alter table test add column pk serial primary key;
NOTICE: ALTER TABLE will create implicit sequence "test_pk_seq" for serial column "test.pk"
NOTICE: ALTER TABLE / ADD PRIMARY KEY will create implicit index "test_pkey" for table "test"
ALTER TABLE
kalman=# select * from test;
field_1 | pk
---------+----
3 | 1
5 | 2
7 | 3
6 | 4
8 | 5
(5 rows)




Regards
Gaetano Mendola

[Steve Crawford]

Post by Keith
Dear All,
Someone can help me to solve the below problems
1. I create a table for a period of time, there is huge records
already posted. I would like to alter table and add serial primary
key on that table. It's impossible to add serial no by hand.
Please adv how can I add the serial number automatically.
2. Is there any library to translate digit number to English, I
mean translate '1234' to 'one thousand two hundred thirty four'..
Pls help.
regards

Going from memory (and note, this will only give you unique numbers -
they won't be in any specific order)...

create sequence foo_sequence;

alter table foo add column (serialnumber bigint);

alter table foo alter column serialnumber set default
nextval('foo_sequence');

update foo set serialnumber = nextval('foo_sequence') where
serialnumber is null;

alter table foo alter column serialnumber set not null;

Cheers,
Steve


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