Question

I am using a select count distinct to count the number of records in a column. However, I only want to count the records where the value of a different column is 1.

So my table looks a bit like this:

Name——Type
abc———1
def———-2
ghi———-2
jkl———–1
mno——–1

and I want the query only to count abc, jkl and mno and thus return ‘3’.

I wasn’t able to do this with the CASE function, because this only seems to work with conditions in the same column.

EDIT: Sorry, I should have added, I want to make a query that counts both types.
So the result should look more like:
1—3
2—2

Answer 1

SELECT COUNT(*) 
  FROM dbo.[table name] 
  WHERE [type] = 1;

If you want to return the counts by type:

SELECT [type], COUNT(*)
  FROM dbo.[table name]
  GROUP BY [type]
  ORDER BY [type];

You should avoid using keywords like type as column names – you can avoid a lot of square brackets if you use a more specific, non-reserved word.