Oracle/SQL For Beginners - DDL | DML | DCL | TCL - Quick Learning
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This document provides an overview of SQL and its main components: DDL, DML, DCL, and TCL. SQL is the standard language used to communicate with databases and perform tasks like updating and retrieving data. DDL commands like CREATE and ALTER are used to define the database structure. DML commands like SELECT, INSERT, UPDATE, and DELETE manage the data within database objects. DCL commands like GRANT and REVOKE manage user privileges. Finally, TCL commands like COMMIT and ROLLBACK manage transactions and allow grouping of statements.
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1. A brief history of SQL and how MySQL relates to relational databases.
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Oracle/SQL For Beginners - DDL | DML | DCL | TCL - Quick Learning
- 1. SQL Session for Beginners Understanding DDL |DML | DCL |TCL Video Tuition Let’s share knowledge
- 2. SQL • SQL (pronounced "ess-que-el") stands for Structured Query Language. SQL is used to communicate with a database. According to ANSI (American National Standards Institute), it is the standard language for relational database management systems. SQL statements are used to perform tasks such as update data on a database, or retrieve data from a database. Video Tuition Let’s share knowledge
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- 4. DML • Data Manipulation Language (DML) statements are used for managing data within schema objects. Commands: 1) SELECT - retrieve data from the a database 2) INSERT - insert data into a table 3) UPDATE - updates existing data within a table 4) DELETE - deletes all records from a table, the space for the records remain 5) MERGE - UPSERT operation (insert or update) Video Tuition Let’s share knowledge
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