Re: PostgresQL 9.2 table query - underscores

On 17/07/13 10:04, Victoria S. wrote:
> Hello: My first post; a Postgres newbie ...
>
> I am teaching myself PostgresQL using a trial database, and I am having trouble with underscores:
>
> IN the following example,
>
> development=# SELECT created_at, username FROM tweets;
> created_at | username
> -----------------------------------+-------------------
> created_at | username
> “Tue, 12 Feb 2013 08:43:09 +0000″ | “_DreamLead”
> “Tue, 12 Feb 2013 07:31:06 +0000″ | “GunnarSvalander”
> “Tue, 12 Feb 2013 07:30:24 +0000″ | “GEsoftware”
> “Tue, 12 Feb 2013 06:58:22 +0000″ | “adrianburch”
> “Tue, 12 Feb 2013 05:29:41 +0000″ | “AndyRyder5″
> “Tue, 12 Feb 2013 05:24:17 +0000″ | “AndyRyder5″
> “Tue, 12 Feb 2013 01:49:19 +0000″ | “Brett_Englebert”
> “Tue, 12 Feb 2013 01:31:52 +0000″ | “Brett_Englebert”
> “Mon, 11 Feb 2013 23:15:05 +0000″ | “NimbusData”
> “Mon, 11 Feb 2013 22:15:37 +0000″ | “SSWUGorg”
> (11 rows)
>
> ... why doesn't his work? :
>
> development=# SELECT created_at, username FROM tweets WHERE username='_DreamLead';
> created_at | username
> ------------+----------
> (0 rows)
>
> I understand why this works:
>
> development=# SELECT created_at, username FROM tweets WHERE username LIKE '%_DreamLead%';
> created_at | username
> -----------------------------------+--------------
> “Tue, 12 Feb 2013 08:43:09 +0000″ | “_DreamLead”
> (1 row)
>
> ... but can't I tweak this,to work, somehow [without using the WHERE or SIMILAR TO clause(s)]? :
>
> SELECT created_at, username FROM tweets WHERE username='_DreamLead';
>
> ===============================================================
>
>
Please supply the SQL you used to create the table & for populating it
with data, we don't know what datatypes you used.

I would use text as the datatype for username.

Cheers,
Gavin