What is the difference between UNION and UNION ALL?
This deals with SQL. UNION only selects distinct values, UNION ALL selects all values. In the context of Core Java, the terms UNION and UNION ALL are not directly related. Instead, they are typically associated with SQL (Structured Query Language), which is used for database operations. In SQL: UNION: The UNION operator is used to combine the result sets of two or more SELECT statements. It removes duplicate rows from the combined result set. The data types in the corresponding columns…