Is there a division operator in PostgreSQL?

Hi experts,

I am a postgresql newbie and i just wondering what is the division operator in postgresql (7.3.2).
I would like to use in a statement that can select person who has completed all the tasks.

thank you

r6
R6Asked:
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Helena MarkováConnect With a Mentor programmer-analystCommented:
In Oracle it is
/
you can try ...
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HaydnHConnect With a Mentor Commented:
Yes it is "/", for more mathmatical operators have a look at the PostgreSQL documentation @:

    http://www.postgresql.org/docs/7.2/static/functions-math.html

Haydn.
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R6Author Commented:
hi Henka & HaydnH,

thanks for helping me!

what i after is the division operator of relational algebra that is defined on instances of relation schema.
Here is what i want to achieve:
Eg.

R

name | task          
-----+------
eric    | A
-----|-------
eric    | B
-----|-------
eric    | C


S
task
----
A
----
B

R/S

name
-----
eric



thank you

r6



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