Which join refers to join records from the write table that have no matching key in the left table are include in the result set
Question
Which join refers to join records from the write table that have no matching key in the left table are include in the result set
Solution
The join that includes records from the right table that have no matching key in the left table is called a Right Join. Here are the steps of how it works:
- The database system compares each row of the left table with each row of the right table to find all pairs of rows which satisfy the join-predicate.
- If the join-predicate is satisfied by matching non-NULL values, column values for each matched pair of rows of A and B are combined into a result row.
- If there is no match, the result is NULL on the side of the table that does not have a matching row.
- The result of the Right Join (or Right Outer Join) includes all the rows from the right table (table B), even if there are no matches in the left table (table A).
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