| From: | Frank G Hahn <efgeho(at)cs(dot)auc(dot)dk> |
|---|---|
| To: | Gustavo Henrique <gustavoh(at)sysadmin(dot)com(dot)br> |
| Cc: | pgsql-sql(at)postgresql(dot)org |
| Subject: | Re: sql doubts |
| Date: | 2000-06-07 13:25:48 |
| Message-ID: | Pine.GSO.4.21.0006071522300.11102-100000@borg.cs.auc.dk |
| Views: | Raw Message | Whole Thread | Download mbox | Resend email |
| Thread: | |
| Lists: | pgsql-sql |
On Wed, 7 Jun 2000, Gustavo Henrique wrote:
Ad 1)
SQL = Structured Query Language :)
TSQL is an extention of SQL that includes support for queries against
temporal databases. VALID/TRANSACTION TIME and SEQUENCED/NONSEQUENCED
queries. If you would like more info on temporal databases try
http://www.cs.auc.dk/TimeCenter which also has an on-line temporal
database you can query using a java-applet (tiger)
http://www.cs.auc.dk/~tigeradm
> Could you help me ? >
> 1- Whats the diference between TSQL and SQL ?
>
> 2- What are nested queries ?
>
> 3- I've seen people using DISTINCT, but what's ALL used for ?
>
> Thanks very much for your attention,
>
>
> Gustavo Henrique Maultasch
> gustavoh(at)sysadmin(dot)com(dot)br
>
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