Structured Query Language (SQL) is used by developers to query and manipulate data in relational database management systems (RDBMS). It consists of language elements such as clauses, expressions, and statements, employing various operators and keywords like SELECT and FROM. Originally developed at IBM in the 1970s, SQL has evolved into a widely-used data management language, with Microsoft's SQL Server being one of its applications.

1. Structured Query Language

2. SQL is a query language which is used
by the developers to query and manipulate
data held by Relational Database
Management System(RDBMS).
SQL uses keywords and operators to create
queries.

3. 1. SQL Language Elements : Includes Clauses, Expressions,
Predicates, Queries and Statements.
2. SQL operators: Includes arithmetic operators(+,-,…);
Comparison operators(<,>,….); Logical operators (ALL,
BETWEEN, ….) and negation.
3. SQL keywords: Includes SELECT, FROM etc which creates an
SQL query.

4. SELECT MONTH, ID, RAIN_I, TEMP_F
FROM STATS
ORDER BY MONTH, RAIN_I DESC;
This query will select all rows with columns MONTH, ID, RAIN_I,
TEMP_F from the SQL table STATS and then order the rows on the basis
of month and rainfall in descending order.

5. Initially know as SEQUEL, SQL was created at IBM by Donald D.
Chamberlin and Raymond F. Boyce in early 1970’s.
SEQUEL was created to fetch data from IBM’S quasi-relational
database.
SQL appeared in 1974 and its first mainstream application
appeared in 1979.

6. SQL server is RDBMS from Microsoft.
SQL Server works on T-SQL, a series of programming
extensions from Sybase and Microsoft.

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