New posts in Union

Using union and order by clause in mysql

a simple way to sum a result from UNION in MySql

Combining UNION and LIMIT operations in MySQL query

Identifying source table from UNION query

Which is faster: Union or Concat?

Using union and count(*) together in SQL query

Combine two tables that have no common fields

What is the difference between JOIN and UNION?

What is the difference between UNION and UNION ALL?

How do I Concatenate entire result sets in MySQL?