MySQL – UNION Operator Table of content MySQL UNION Operator The UNION operator in MySQL combines the data (without duplicate records) from multiple tables. We can use UNION if we want to select rows one after the other from several tables or several sets of rows from a single table all as a single result […]

MySQL – MINUS Operator Table of content MySQL MINUS Operator The MySQL MINUS operator is one of the set operators which is used to fetch unique records from one table that do not exist in another table. In other words, the MINUS operator compares two tables and returns the unique rows from the first table […]

MySQL – IS NOT NULL Operator Table of content A NULL value in a MySQL table indicates a missing or unknown value. It appears to be blank and does not contain any data. This is different from zero values. It is very important to understand that a NULL value is different than a zero value […]