Teradata SQL basic commands

Teradata SQL basic commands

Teradata basic SQL commands commonly are divided into three categories:

1.Data Definition Language (DDL): - We can define and create database objects such as tables, macros, views, databases and users etc by using DDL commands.

SQL statement	Function
CREATE	To define a table, macro,view, index, trigger or stored procedure.
DROP	To remove a table, view, macro, index, trigger or stored procedure.
ALTER	To change table structure or protection definition.

          

2.Data Manipulation Language (DML): - Work with the data including tasks such as inserting data rows into a table and updating an existing row or performing queries on the data by using the DML  commands. 

SQL statement	Function
SELECT	To select data from one or more tables.
INSERT	To place a new row into a table.
UPDATE	To change data values in one or more existing rows.
DELETE	To remove one or more rows from a table.

3.Data Control Language (DCL): - Here we can perform the administrative tasks such as granting and revoking privileges to database objects or controlling ownership of those objects by using DCL  commands.

SQL statement	Function
GRANT	To give user privileges.
REVOKE	To remove user privileges.
GIVE	To transfer database ownership.