• Mysql 5.1, 5.5 are more stable than other versions.
  • postgresql has more strict "sql standard " than mysql.
  • A server contains multiple databases, a database contains multiple tables, a table contains multiple records.
  • Transaction(事务):  a series of database's options which have strong connection.
  • Relationship of cmd and mysql:   cmd(client) <-->  mysql(server)
  • connect mysql in dos:

　　　　1. move to the folder where there is your mysql's installation is located.

　　　　2.> mysql -u[username] -p[password]

  • mysql's default port is 3306

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