Knowing how to write a basic SQL statement is a vital skill and I agree with everything already written, you need to know a SELECT statement (including from), WHERE, and ORDER BY.

SQL is a powerful language for manipulating data in databases, but sometimes you need to add some logic or conditions to your queries. That's where SQL CASE and IF statements come in handy.

#GROUP BY clause- groups together rows or columns then runs an aggregate function such as AVG, MAX, MIN, ETC on those rows. The column name passed in the SELECT statement has to match the column name ...

It is more efficient to omit the ORDER BY clause when you are creating the view and specify it as needed when you reference the view in queries. Note: If you specify the NUMBER option in the PROC SQL ...