Explain any three Text() of SQL? Using syntax and example?
Answers
Answer:
In the era where data is being generated in humongous amounts, there is a constant need to handle data in databases. Relational databases are one of the most popular databases, and SQL is the basis of relational databases. Therefore SQL skills are indispensable in most of the job roles. In this article on SQL Commands, I will discuss the top commands and statements that you need to understand in SQL.
The topics covered in this blog are mainly divided into 4 categories:
Data Definition Language(DDL) – Consists of commands which are used to define the database.
Data Manipulation Language(DML) – Consists of commands which are used to manipulate the data present in the database.
Data Control Language(DCL) – Consists of commands which deal with the user permissions and controls of the database system.
Transaction Control Language(TCL) – Consist of commands which deal with the transaction of the database.
Apart from the above commands, the following topics will also be covered in this article:
Comments in SQL
Different Types Of Keys In Database
Constraints Used In Database
Nested Queries
Joins
Set Operations
Dates & Auto Increment
Views
Stored Procedures
Triggers
In this article on SQL Commands, I am going to consider the below database as an example, to show you how to write commands.
Explanation:
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Answer:
Structured Query Language (SQL) is a specialized language for updating, deleting, and requesting information from databases. SQL is an ANSI and ISO standard, and is the de facto standard database query language.are used to perform an operation on input string and return an output string.