MySQL by Examples

Jun 29th, 2015
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Rogers State University
Course: general
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The databases "mysql", "information_schema" and "performance_schema" are system databases used internally by MySQL. A "test" database is provided during installation for your testing.

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MySQL by Examples for BeginnersRead "How to Install MySQL and Get Started" on how to install, customize, and get started with MySQL.1.Summary of MySQL Commands Used in this TutorialFor detailed syntax, check MySQL manual "SQL Statement Syntax" @ Database-LevelDROP DATABASE databaseName -- Delete the database (irrecoverable!)DROP DATABASE IF EXISTS databaseName -- Delete if it existsCREATE DATABASE databaseName -- Create a new databaseCREATE DATABASE IF NOT EXISTS databaseName -- Create only if it does not existsSHOW DATABASES -- Show all the databases in this serverUSE databaseName -- Set the default (current) databaseSELECT DATABASE() -- Show the default databaseSHOW CREATE DATABASE databaseName -- Show the CREATE DATABASE statement -- Table-LevelDROP TABLE [IF EXISTS] tableName, ...CREATE TABLE [IF NOT EXISTS] tableName ( columnName columnType columnAttribute, ... PRIMARY KEY(columnName), FOREIGN KEY (columnNmae) REFERENCES tableName (columnNmae))SHOW TABLES -- Show all the tables in the default databaseDESCRIBE|DESC tableName -- Describe the details for a tableALTER TABLE tableName ... -- Modify a table, e.g., ADD COLUMN and DROP COLUMNALTER TABLE tableName ADD columnDefinitionALTER TABLE tableName DROP columnNameALTER TABLE tableName A

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