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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:
- a)Left outer join
- b)Right outer join
- c)Full outer join
- d)Half outer join
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which join refers to join records from the write table that have no ma...
Right Outer Join Explanation:
The right outer join, also known as a right join, includes all the records from the right table (write table) and only the matching records from the left table. If there is no match found in the left table, NULL values are filled in for the columns from the left table.
Key Points:
- The right outer join is used to join records from the write table that have no matching key in the left table.
- All rows from the right table will be included in the result set, even if there are no matching rows in the left table.
- If there is no match found in the left table, NULL values are filled in for the columns from the left table.
- This type of join helps in identifying records that exist in the write table but do not have corresponding entries in the left table.
In summary, the right outer join is a useful tool when you want to include all records from the write table, regardless of whether there is a matching key in the left table. It helps in analyzing data discrepancies and identifying missing data in relational databases.
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Which join refers to join records from the write table that have no ma...
A right outer join will return all the rows that an inner join returns plus one row for each of the other rows in the second table that did not have a match in the first table. It is the same as a left outer join with the tables specified in the opposite order.
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