SQL subquery with COUNT help

Question

I have an SQL statement that works

SELECT * FROM eventsTable WHERE columnName=\'Business\'

I want to add this as a subquery...

Answer 1

This is probably the easiest way, not the prettiest though:

SELECT *,
    (SELECT Count(*) FROM eventsTable WHERE columnName = 'Business') as RowCount
    FROM eventsTable
    WHERE columnName = 'Business'

This will also work without having to use a group by

SELECT *, COUNT(*) OVER () as RowCount
    FROM eventsTables
    WHERE columnName = 'Business'