Re: sql doubts

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@sysadmin.com.br
>