Author Archives: user

MySQL – Using Joins Table of content A Join clause in MySQL is used to combine records from two or more tables in a database. These tables are joined together based on a condition, specified in a WHERE clause. For example, comparing the equality (=) of values in similar columns of two different tables can […]

MySQL – UNION vs UNION ALL Table of content UNION and UNION ALL operators in MySQL are used to retrieve the rows from multiple tables and return them as one single table. However, for these operators to work on these tables, they need to follow the conditions given below − The tables to be combined […]

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 […]