Tag Archives: Data Manipulation Language

Data Manipulation Language

Data Manipulation Language Data Manipulation Language (DML) deals with the basic SQL queries. There are many SQL commands; The SELECT command is one such DML commands, which is used to retrieve information from the database. The basic form of SQL SELECT statement is also called a mapping. The SELECT expression consists of three clauses: SELECT, FROM …

SQL Structure

SQL Structure SQL Structure : The SQL language comprised of following parts: Data Definition Language (DDL) We know that RDBMS uses tables and the SQL-DDL provides commands for defining relation schema, deleting relations, creating indices, and modifying relation schema. DDL commands CREATE, ALTER and DROP used for creating, altering and removing relational schema. The SQL DDL includes …