Question

I would like to know the query where I can get the normal set of columns and add a column that contains the number of records in database..

For example, let’s say I have these data..

ColA   ColB   ColC
----   ----   ----
1AB1   CARR   APPL
2BC1   APPL   APPL
1AB1   MAXR   APPL

from those lines, I would like to generate these columns

ColA   ColB   ColC   Count
----   ----   ----   -----
1AB1   CARR   APPL     2

A. This is my current select statement so far..

SELECT top 1 myTBL.* from mydb WHERE ColA = '1AB1'

B. But i couldn’t seem to add the following code to get my fourth column..

SELECT count(myTBL.*) as Count from mydb WHERE ColA = '1AB1'

P.S. I would like to get a select statement that combines A and B select statements that I have. The error I’m getting says something about GROUP BY clause.. I’m having a hard time to understand this.. I hope you could formulate the correct select statement I can use for the given example.. Thanks for all the help..

Answer 1

SELECT TOP 1 ColA, ColB, ColC, COUNT(*) OVER (PARTITION BY ColA) AS Count
FROM mydb
WHERE ColA = '1AB1'

Demo on SQLFiddle