Assume I have a database.

Maintable (matchNo integer, year INTEGER, month INTEGER)

 

I have to find the count of distinct year, month combinations in which
matches were played.

I tried the query select COUNT (DISTINCT column1, column2) from table
but this gives an error.

I would like to know is there a simple query by which one can figure out
this.

 

Assume you have a following data:

matchNo, year, month

34         2007     9

27         2006     5

26         2006     5

 

Now distinct year, month will return

2007, 9

2006, 5

 

Is there a way by which I can count (distinct year, month) combinations?
For this example answer should be 2.

 

 

Regards,

Phani

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