How SQL Works?
A server machine is used in the implementation of the structured query language (SQL), processing database queries and returning results. The following are some of the software elements that the SQL process goes through.
Parser
The parser begins by replacing some of the words in the SQL statement with unique symbols, a process known as tokenization. The statement is then examined for the following:
Correctness
The parser checks to see if the SQL statement complies with the rules, or SQL semantics, that guarantee the query statement’s accuracy. The parser, for instance, looks to see if the SQL command ends with a semicolon. The parser returns an error if the semi-colon is absent.
Authorization
The parser additionally confirms that the user executing the query has the required permissions to alter the relevant data.
Relational Engine
The relational engine, also known as the query processor, develops a strategy for efficiently retrieving, writing, or updating relevant data. For instance, it looks for queries that are similar to others, uses earlier data manipulation techniques, or develops a new one. Byte code, an intermediate-level representation of the SQL statement, is used to write the plan. To efficiently perform database searches and modifications, relational databases use byte code.
Storage Engine
The software element that interprets the byte code and executes the intended SQL statement is known as the storage engine, also known as the database engine. The data in the database files on the physical disc storage is read and stored. The storage engine delivers the outcome to the requesting application after completion.
What is SQL?
Structured Query Language (SQL) is a specialized programming language for managing relational database data. It allows users to store, manipulate, and retrieve data efficiently in databases like MySQL, SQL Server, Oracle, and more.
In this article, we will learn about what is SQL? and check its characteristics, rules, uses, commands, etc.
Table of Content
- What is SQL?
- Components of a SQL System
- What are the characteristics of SQL?
- How SQL Works?
- SQL Rules
- What are SQL commands?
- Uses of SQL
- Why SQL?
- SQL Injection
- What is SQL Server?