Disadvantages of Composite Key
- Complexity in Querying: Complicated queries will emerge if the primary key is composite, and they will be clearly visible when working with several tables. Consequently, queries may require addition of the conditional clause to involve many attributes responsible for unique structural key. As a result, those statements are quite long and complex.
- Maintenance Challenges: Otherwise such as in cases when uncertain difference occurs to the composition key which is composed of multiple basic attributes that cannot remain unchanged like the updates or the deletions, then the main task which is to maintain data integrity becomes more difficult. The updation process could be complex if even one of the values is changed in the composite key, which may warrent updating many records across various tables that may be subject to mistake.
- Limited Flexibility: When a composite key with a set of fields that are affected by constant updates and deletions, such as data auditing, assuring data integrity becomes so troublesome. Changing the value of the composite key can occur either in the single table or in many tables, which may affect other table’s data. Furthermore, it can be difficult to spot the error if the system is complex.
Composite Key in Database
A database is a structured collection of data organized and stored electronically in a computer system. It is designed to efficiently manage, retrieve, and manipulate large volumes of data according to specific requirements and criteria.
In a relational database, the key plays an important role. The key is used to identify a record or a tuple of the table uniquely. Keys are also used to establish and identify the relationships between the tables.
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