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Not getting unique records

sam2929 asked
Last Modified: 2013-11-16
I have values like
id         date          code
0001      20110729123425      aaa
0001      20110729205634      aaa

i just want to pick up last date to make record distict

i am doing

select max(date) ,id, code from table aa
group by id.code

it should give me distinct
0001      20110729205634      aaa but i getting both records

date is chracter 14

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