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DBMS Important Questions With Answers

DBMS – 21CS53 Important Questions With Answers Module 2 and 4 will be updated soon, Share with your friends which motivates us to work faster Module -1 1] Explain three schema architectures 2] Explain Data Independence 3] Characteristics of the…

Explain nested queries with examples

Explain correlated nested queries with examples Answer:- Some queries require fetching existing values from the database and then using them in a comparison condition. Such queries can be formulated using nested queries, which are complete SELECT-FROM-WHERE blocks within the WHERE…

Explain Assertions in DBMS

Explain Assertions in DBMS Answer:- Assertions are used to specify additional types of constraints beyond the built-in relational model constraints. In SQL, users can declare these constraints using the CREATE ASSERTION statement in the Data Definition Language (DDL). Each assertion…

Explain Retrieval queries in SQL

Retrieval queries in SQL are used to fetch data from one or more tables in a database. They are typically constructed using the SELECT statement, which allows you to specify the columns to retrieve, the tables from which to retrieve…