Answer / Hira Lal Sharma

There are several types of SQL (Structured Query Language) based on their purpose or implementation:
1. ANSI SQL: A standardized version of SQL, defined by the American National Standards Institute (ANSI).
2. SQL-92/SQL-99: Early versions of ANSI SQL.
3. Oracle SQL: Proprietary dialect used in Oracle databases.
4. MySQL SQL: Dialect used in MySQL databases.
5. PostgreSQL SQL: Dialect used in PostgreSQL databases.
6. Microsoft SQL Server T-SQL: Dialect used in Microsoft SQL Server.

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