Multiple Queries with a Single ResultSet
In this blog you will learn Multiple Queries with a Single ResultSet.
How to merge multiple queries and produce a single result set??
1. UNION:
Union helps to merge Two Queries but on the condition that,
- Both queries return the same number of columns
- The selected columns in both queries have matching data type
Incorrect Union Mapping
Correct Union Mapping
2. JOINS:
Joins can be used when both the queries have a mapping column to match and fetch result set.