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DDL commands
DDL commands are used to define the structure of a database, including tables, views, and stored procedures. They are typically used by database administrat...
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DDL commands are used to define the structure of a database, including tables, views, and stored procedures. They are typically used by database administrat...
DDL commands are used to define the structure of a database, including tables, views, and stored procedures. They are typically used by database administrators to ensure that the database is set up correctly and consistently.
DDL commands have three main components:
D - defines a new table.
D - defines a new view.
D - defines a new stored procedure.
Examples of DDL commands:
CREATE TABLE my_table (column1 data_type, column2 data_type, ...) PRIMARY KEY (primary_key_column); This command creates a new table called my_table with four columns: column1, column2, column3, and primary_key_column.
CREATE VIEW my_view AS SELECT column1, column2 FROM my_table WHERE condition; This command creates a new view called my_view that selects data from the my_table table where the condition is met.
CREATE PROCEDURE my_procedure (parameter1 data_type, parameter2 data_type) BEGIN ... END; This command creates a new stored procedure called my_procedure that takes two arguments: parameter1 and parameter2 of the specified data types.
DDL commands are powerful tools for managing the structure of a database. By understanding how to use DDL commands, you can easily create and maintain a well-structured database