8. What are DDL, DML, DCL, TCL, and DQL in SQL? DDL: Data Definition Language is used to create, modify, and drop the schema of database objects. CREATE, ALTER TABLE, DROP, TRUNCATE are DDL commands. DML: Data Manipulation Language allows to change or manipulate the existing data of...
SQL Provides Various Concepts like Schema Creation, User Creation, DML (Insert, Update, Delete, Merge), DDL(Create,Alter,Drop,Truncate,Rename), TCL(Commit,Rollback,Savepoint) ,DCL(Grant, Revoke) etc.Nowadays SQL is the basic stuff for IT professions to learn any data warehousing Concepts. Our...
Check out this insightful PL/SQL tutorial to learn moreabout PL/SQL Packages! 40. What do you know about the Commands COMMIT, ROLLBACK, and SAVEPOINT? COMMIT:The COMMIT command saves changes to a database permanently during the current transaction. ...
TCL Langage de contrôle des transactions Mise à jour de la base de données avec les modifications apportées à l'aide de commandes DML Développez vos compétences en SQL avec DataCamp Les données sont de bonne qualité lorsqu'elles sont bien définies et structurées. Les commandes ...
TCL – Transaction control language:Used to manage transactions in the database. SQL Operators: SQL statements generally contain some reserved word or a character in a ‘where’ clause to perform operations such as comparison and logical operations. ...