Database Languges
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The document discusses data manipulation languages (DML) and data definition languages (DDL) in databases. DML includes statements like INSERT, DELETE, and UPDATE that are used to manipulate data within database objects. DDL includes statements like CREATE, ALTER, and DROP that are used to define and modify database structures and objects. Some examples of DDL syntax provided are CREATE TABLE to create a table, DROP TABLE to delete a table, and ALTER TABLE to add or modify elements of a table.
Database Languges
- 2. • – Subset of SQL used to manipulate data in databases • – INSERT, DELETE, UPDATE statements • – Subset of SQL used to describe database objects • – CREATE, ALTER, DROP statements • – Data types
- 3. • A data manipulation language (DML) is a family of syntax elements similar to a computer programming . • language used for selecting, inserting, deleting and updating data in a database. • A data definition language or data description language (DDL) is a syntax similar to a computer programming language for defining data structures, especially database objects.
- 6. • Syntax: "Remove the Student from department": • DELETE FROM Department • WHERE DeptName = ‘Student’
- 8. DATA DEFINITION LANGUAGE (DDL) • DDL statements are used to build and modify the structure of your tables and other objects in the database. • it is used to specify a database scheme as a set of definitions. • the Data Definition Language (DDL) allows you to create, alter, and delete database objects.
- 9. • Syntax: • CREATE TABLE <name> ( • <list of elements> • To Delete • DROP TABLE <name>; • To Alter • To ALTER TABLE <name> ADD <element>
- 10. statements are used to define the database structure or object. statements are used for managing data within objects.