SQL operators are symbols or keywords that allow you to compare, filter, and manipulate data in a database. They are essential for writing queries, conditions, and expressions in SQL, the standard ...

Set operators such as UNION, INTERSECT, and EXCEPT enable analysts to combine and compare datasets from multiple sources or queries in SQL. Analysts use set operators to perform set operations ...

If you recall from earlier lessons on joins, the join clause is evaluated before the where clause - filtering in the join clause will eliminate rows before they are joined, while filtering in the ...