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COUNT Multiple Columns using GROUP BY – SQL

I am trying to create a GROUP BY COUNT of ~30 columns in my database. The database is basically a shiftplan, where on each column a row can be assigned different shift types (denoted as a D, N, A, X, F, C, etc..). I can use the following query to get a count of each shift type, am struggling to

SQL Join – Limit to base table

I have 4 tables that I want to link together based on the information in the sales_details table which will serve as the base table (limiting results based on the sales_details table) 1)I want to pull all columns from the sales_detail table that are mastercard orders but since the sales_detail table doesn&#82…