TCL Commands in SQL- Transaction Control Language Examples: Transaction Control Language can be defined as the portion of a database language used for maintaining consistency of the database and managing transactions in the database. A set of SQL statements that are co-related logically and executed on the data stored in the table is known as … Read more
The Update is one of the DML (data manipulation) commands that are essentially used to update the existing data in the records/tuples. Pick a case of a company as an example that maintains the database for all the employees working for the company. But what happens when an employee decides to leave the company? His … Read more
Insert statement is a basic yet most useful command in SQL to insert new data (records) into the table in the database. There are various ways in which data can be inserted into a table. For instance, you can insert data into specific columns of a table or insert data in the entire row (consisting … Read more
As a SQL developer, often there are scenarios when you tend to manipulate and retrieve the data in a specific way. In other words, you would want to perform various operations. And knowing SQL operators is the key solution to all such requirements. So let us first understand What is an Operator? An operator in … Read more
A Datatype can be defined as “Type of the value that is stored in a column of a table”. For instance, you want to create a table and have a column that will store all the names of students in your class then based on this requirement you choose CHARACTER or STRING datatype. Suppose you … Read more
Relational Data Model: Concept, Constraints, Advantages: The relational data model can be defined as the database that displays a cluster of relations between tables of values. There is a collection of data values represented by each row in the table that denotes a real-world relationship. Also See: Relational Calculus in DBMS with forms Domain and … Read more
What is data extraction and Tools in DBMS? Data extraction can be defined as the process of masking the data by eliminating irrelevant details so that the complexity can be minimized. The main motive of this technique is to boost efficiency in terms of data retrieval. The database design gets simplified due to this process. … Read more
10 Differences between SQL Vs MySQL in Tabular Form: A programmer has to utilize tons of different languages for creating, reading, updating, and deleting data located in the back-end. Their job isn’t very easier as they sometimes have to manipulate the relational database management system using various structured query languages, also known as SQL. Many … Read more
Relational Calculus in Dbms with forms Domain and Tuple: Contrary to relational algebra that could be a procedural source language to fetch information and that conjointly explains however it’s done, relational Calculus is a non-procedural source language and has no description regarding how the query can work or the information can be fetched. It solely … Read more
Explain Database Schema and its Types: A database schema is a skeleton structure that represents the logical view of the complete database. It defines how it is organized and the way the relations among them are associated. It formulates all the constraints that are to be applied to the information. A database schema defines its … Read more