In an OUTER JOIN query, the outer join operator (+) is placed after which table?
In an OUTER JOIN query, the outer join operator (+) is placed after which table?
Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
Problem 1PE
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Question
In an OUTER JOIN query, the outer join operator (+) is placed after which table?
Expert Solution
Step 1
OUTER JOIN:
- Outer Join is the joining method in which that gets all rows with matching values in the join columns including unmatched rows.
- Null values appear in columns where there is no match between tables.
- Outer join keyword is used to return all rows from the left table and from the right table. This keyword combines the result of both LEFT and RIGHT joins.
- In an OUTER JOIN query, the outer join operator (+) is placed after the deficient table.
- That is, the outer join operator (+) is placed after the column name that is missing the matching.
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