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How to get hourly count in Oracle sql or pl/slq

jl66 asked
Last Modified: 2012-05-11
Have a table T1(ID number(10) primary key, Created date) with the a lot of data
Want to get hourly record counts For example.
hour    count
0 to 1, 5 records
1 to 2 , 10 records
8 to 9 , 1000 records
9 to 10, 5000 reocrds
23 to 24, 12 records
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