Informix Guide to SQL: Tutorial
Chapter 3: Composing Advanced SELECT Statements
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Composing Advanced SELECT Statements
Using the GROUP BY and HAVING Clauses
Using the GROUP BY Clause
Using the HAVING Clause
Creating Advanced Joins
Self-Joins
Outer Joins
Simple Join
Simple Outer Join on Two Tables
Outer Join for a Simple Join to a Third Table
Outer Join for an Outer Join to a Third Table
Outer Join of Two Tables to a Third Table
Subqueries in SELECT Statements
Using ALL
Using ANY
Single-Valued Subqueries
Correlated Subqueries
Using EXISTS
Set Operations
Union
Intersection
Difference
Summary
Informix Guide to SQL: Tutorial
, version 9.1
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