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Aggregate function in SQL with Examples
In a Database Management System (DBMS), an aggregate function is a special tool that performs calculations on a set of… -
SQL and Parts of SQL language
SQL is a popular programming language, which is used to manage the relational databases and to perform various operations on… -
Views in Relational Algebra
In SQL, virtual table are considered as views. Like Tables, views also contain rows and columns. We can select the… -
Syntax of following SQL commands: sysdate, to date(), dual table ,to_number, substr() and initcap()
1. SYSDATE Purpose: SYSDATE is a function that returns the current date and time of the database server. Syntax SELECT… -
What is Super key, Candidate key and Primary key?
1. Super Key A super key is an attribute or a set of attributes within a table that uniquely identifies… -
What is Cursor? Difference between Implicit and Explicit Cursor
A Cursor is essentially a temporary work area created in the system memory that comes into play during the execution… -
What is Relational Algebra?
Relational algebra is a formal language used to query and manipulate data stored in relational database systems. It provides a… -
What do you mean by Relational Model? Explain with Example
The relational model is a type of model, which represents how the data are stored in a relational database. In… -
Functions of DBA in DBMS
The role of a Database Administrator (DBA) is to manage and maintain the performance, security, and integrity of a database.… -
What is Data Abstraction and Data Redundancy in DBMS
In the world of data management, two terms often come up: data abstraction and data redundancy. Both play crucial roles…