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Multiple Queries with a Single ResultSet
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Venkatesan Jayakantham
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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.
SQL Server
UNION Mapping
JOINS
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