DBMS | Aggregate Functions: In this tutorial, we will learn about the different types of aggregate functions with their usage, syntax, and examples in DBMS.ByAnushree GoswamiLast updated : May 27, 2023 What are Aggregate Functions in DBMS?
The following diagram shows the connection between OLTP and OLAP: OLTP Features OLTP databases can handle a large number of concurrent transactions while ensuring data consistency and reliability. Below are the key features that make OLTP systems efficient: Handling transactions that involve small data ...
Insertion Anomaly:Insertion Anomaly refers to when one cannot insert a new tuple into a relationship due to lack of data. Deletion Anomaly:The delete anomaly refers to the situation where the deletion of data results in the unintended loss of some other important data. ...
1968-1980 was the era of the Hierarchical Database. Prominent hierarchical database model was IBM's first DBMS. It was called IMS (Information Management System). In this model, files are related in a parent/child manner. Below diagram represents Hierarchical Data Model. Small circle represents ...