SQL Facts SQL stands for Structured Query Language SQL is pronounced “sequel” SQL is declarative language SQL is used to access & manipulate data in databases Top SQL DBs are MS SQL Server, Oracle, DB2, and MySQL SQL Commands Categories Data Query...
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SQL Facts SQL stands for Structured Query Language SQL is pronounced “sequel” SQL is declarative language SQL is used to access & manipulate data in databases Top SQL DBs are MS SQL Server, Oracle, DB2, and MySQL SQL Commands Categories Data Query Language (DQL) SELECT - Retrieve data from table(s) Data Manipulation Language (DML) INSERT - Insert data into db table UPDATE - Update data in db table DELETE - Delete data from table Data Definition Language (DDL) CREATE - Create db object (table, view, etc.) ALTER - Modify db object (table, view, etc.) DROP - Delete db object (table, view, etc.) Data Control Language (DCL) GRANT - Assign privilege REVOKE - remove privilege Database Definitions RDBMS (Relational Database Management System) – Software that stores and manipulates data arranged in relational database tables. Table – A set of data arranged in columns and rows. The columns represent characteristics of stored data and the rows represent actual data
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