Asked by Adriana Vander Heyden on May 31, 2024
Verified
If you want to find records in the table on the "one" side of a one-to-many relationship that do not have related records in the "many" side, which join do you use?
A) inner
B) self
C) left outer
D) cascade updates
One-To-Many Relationship
A type of database relationship where a single record in one table can be associated with one or more records in another table.
Records
Pieces of information or data that are stored and managed as part of a larger dataset or database, often consisting of multiple fields to represent different attributes.
- Gain insight into the various joins in database management and how they are applied.
- Comprehend the characteristics and functions of an outer join.
Verified Answer
ZK
Zybrea KnightJun 05, 2024
Final Answer :
C
Explanation :
To find records in the table on the "one" side of a one-to-many relationship that do not have related records in the "many" side, we need to use a left outer join. This join will return all records from the table on the left side (the "one" side) and only the matching records from the table on the right side (the "many" side). The non-matching records from the table on the left side will have null values for the columns from the table on the right side. By looking for these null values, we can identify the records in the table on the left side that do not have any related records in the table on the right side.
Learning Objectives
- Gain insight into the various joins in database management and how they are applied.
- Comprehend the characteristics and functions of an outer join.