oracle - Timestamp to timestamp with timezone -


i have compare value in column has datatype timestamp of column has timestamp timezone datatype. please tell me how can convert former datatype timestamp timezone. have query :

select * table1 col1>= (select col2 table 2)

where col1 timestamp , col2 timestamp tz

the sample value col2 : 15-jun-12 05.46.29.600102000 pm -07:00

you can use cast(col1 timestamp time zone)

oracle takes current user session time zone sessiontimezone account conversion. comparison done on utc values.

if specify time zone can from_tz, example from_tz(col1, 'europe/zurich')


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