>> 4 Categories ## DDL - Data Definition Language - Used to define format and type i.e. structure of objects. -- CREATE, ALTER, DROP, TRUNCATE, COMMENT, RENAME ## DML - Data Manipulation Language - Used to manipulate data stored in tables. -- SELECT, INSERT, UPDATE, DELETE, MERGE, CALL, EXPLAIN PLAN, LOCK TABLE ## DCL - Data Control Language - Used to define roles, permissions, referential integrities and other security features. -- GRANT, REVOKE ## TCL - Transactional Control Language - Used to manage transactions happening in database. -- COMMIT, ROLLBACK, SAVEPOINT, SET TRANSACTION >> Objects >> General >> Tables - Objects which will stay permanently in database. Contains columns and rows. CREATE TABLE Emp1 ( ID int Primary Key , FirstName VARCHAR ( 255 ) , LastName VARCHAR ( 255 ), Salary int ) CREATE TABLE Emp2 ( ID int Primary Key , Area VARCHAR ( 2...
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