Hi,
I'd like to ask how to write sql query returning following results without
using any other table than table1 (e.g. without outer join with table
containing all possible day numbers...)
table1:
day | data
------------
1 | x
1 | x
2 | x
4 | x
4 | x
I'd like to write query returning this:
query results:
day | number of records for a day
----------------------
1 | 2
2 | 1
3 | 0 <--- !!!
4 | 2
Is it possible to do this in sql?
thanks a lot, kuba
