Reducing the memory utilisation of my database

Hi,
I want to reduce the memory utilisation of my database. I want to know which sqls have assigned by the oracle some OS memory in my database.I have the awr reports with me.
My questions:
1.Which section of the awr will give exactly this information?
(SQL ordered by Sharable Memory doesn't help )
2. Or can you tell me some views or tables wherein I get the needed the information which I can query against in my database?
3. How can I reduce the memory utilisation in case I get the problematic sqls?
Thanks,
Sach

I'm not sure that I understand your question. Can you clarify a couple points for me?
What memory are we talking about here? Normally, most of the RAM allocated to Oracle is going to be SGA. But SGA isn't associated with any particular SQL statement, at least not in a fashion that I could contemplate doing reporting on. Individual SQL statements require RAM temporarily in the PGA during execution, but it sounds like you're not interested in that.
What is the problem you are trying to solve here? If you want to reduce the amount of RAM allocated to Oracle from the operating system, you should be able to do that without analyzing any specific SQL statements by adjusting memory parameters. Mentioning what version of Oracle, what parameters you've set, and how much you'd like to reduce memory consumption would be helpful if you want specific suggestions for parameters to change.
What does "problematic sqls" mean in this context?
Justin

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*a UNPARSED_DATA                       102,400             128         102,272     .1         102,272               0     .0
*a USERS                             4,096,000              64       4,095,936     .0       4,063,232      33,554,416   12.2
*m SYSTEM                            1,433,600         835,520         598,080   58.3         597,952      33,554,416    4.3
*m TEMP                             54,033,408      54,033,408               0 100.0               0      33,554,416 161.0
*m UNDOTBS1                         37,650,416         426,416      37,224,000    1.1       4,063,232      33,554,416 112.2
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