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Consistency constraints in dbms?
it describes the instance of one entity is associated with each instances of an entity depending upon the range of cardinality constraints are two types they are minimum cardinality maximum cardinality
What is structural constraints?
Structural constraints are set in place by a system or organization. This is based on rules that are to be followed as directed by the organization.
What is a Multi-user DBMS Architecture?
A Multi-user DBMS Architecture is one big system of users and queries. The use of these are to over look and execute plans safely and does not violate and integrity constraints.
How do you disable constraints in dbms?
To disable constraints in a DBMS, you typically use specific SQL commands tailored to the database system in use. For example, in Oracle, you can use the command ALTER TABLE table_name DISABLE CONSTRAINT constraint_name;. In SQL Server, you would use ALTER TABLE table_name NOCHECK CONSTRAINT constraint_name;. Always remember to re-enable the constraints after your operations to maintain data integrity.
What is intension in dbms?
In database management system (DBMS), intension refers to the structure or schema of the database. It defines the overall design and organization of the database, including tables, columns, data types, constraints, and relationships. It serves as a blueprint for creating and managing the database.
What ensures the value of the foreign key matches another tables primary key?
It is the DBMS that ensures the value of the foreign key matches another table's primary key when referential integrity constraints are enabled within the DBMS
What does A DBMS use to perform validation checks?
A Database Management System (DBMS) uses various mechanisms to perform validation checks, including data types, constraints, and triggers. Data types ensure that only appropriate types of data are entered (e.g., integers, strings). Constraints like primary keys, foreign keys, unique constraints, and check constraints enforce rules on the data. Additionally, triggers can be used to implement custom validation logic that executes automatically in response to certain database events.
What is integrity problem in dbms?
Integrity problems in a database management system (DBMS) refer to issues such as data inconsistencies, duplicates, or inaccurate information that may arise due to violations of data integrity constraints. These constraints ensure the accuracy and validity of data stored in the database by enforcing rules such as unique values, referential integrity, and domain constraints. Failure to maintain data integrity can lead to errors, data corruption, and compromised reliability of the information stored in the database.
Mention 3 situations where it is not desirable to use dbms?
For small-scale projects with minimal data storage requirements, using a DBMS may introduce unnecessary complexity and overhead. In scenarios with strict real-time constraints or extreme performance requirements, the additional processing time involved in interacting with a DBMS may not be acceptable. When the data is highly unstructured or varies significantly in format, a DBMS may not be the most efficient or effective storage solution.
Describe two alternatives for specifying structural constraints on relationship types?
funny if i know the answer then why i search the answer of this question.
What is functional dependency in DBMS?
A key is a set of attributes that uniquely identifies an entire tuple, a function dependency allow us to express constraints that uniquely identify the values of certain attribute.
What are highlights of DBMS?
NA_ what are highlights of advanced DBMS what are highlights of advanced DBMS what are highlights of advanced DBMS
