Get an introduction to SQL with our comprehensive guide. Learn the basics of SQL and start your journey into the world of database management
SQL is divided into three major parts. Data manipulation language (DML) is used to store and retrieve data from the database. Data description language (DDL) is used to define the structure of the data. Data control language (DCL) is used to restrict access to data by certain users. ...
Throughthe SQL DML commands UPDATE, INSERT, and DELETE--which can be used independently or within a PL/SQL block--specify changes you wish to make to the information stored in the database. These changes are not made permanent until you enter a SQL COMMITcommand or a SQL DCL or DDL comm...
iSQL*Plus executes a SQL or PL/SQL statement at the end of the Input area, even if it is incomplete or does not have a final ";" or "/". If you intend to runiSQL*Plus scripts in the SQL*Plus command-line, you should make sure you use a ";" or "/" to terminate your stat...
and DELETE--which can be used independently or within a PL/SQL block--specify changes you wish to make to the information stored in the database. These changes are not made permanent until you enter a SQL COMMIT command or a SQL DCL or DDL command (such as CREATE TABLE), or use the...