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CSE 3330 Database Concepts

CSE 3330 Database Concepts. Stored Procedures. How to create a user. CREATE USER.. http://dev.mysql.com/doc/refman/5.1/en/create- user.html GRANT PRIVILEGE http:// dev.mysql.com /doc/ refman /5.1/en/ grant.html. Find list of users. select user from mysql.user ;

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CSE 3330 Database Concepts

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  1. CSE 3330 Database Concepts Stored Procedures

  2. How to create a user CREATE USER.. http://dev.mysql.com/doc/refman/5.1/en/create-user.html GRANT PRIVILEGE http://dev.mysql.com/doc/refman/5.1/en/grant.html

  3. Find list of users select user from mysql.user; • A wealth of information exists in mysql database use mysql; Show tables; Desc user;

  4. Stored Procedure • SP is a code written in SQL that is compiled and stored on the DB server. • Used for repetitive tasks. • You can use programming language constructs likevariables, loops, assignments, cursors, etc • Pre-compiled => Efficient

  5. Background Good background http://code.tutsplus.com/articles/an-introduction-to-stored-procedures-in-mysql-5--net-17843 Advantages: • Share logic • Grant users permissions to SP rather than tables • Security • Improved Performance, reduces network traffic

  6. Simple SP

  7. Simple SP DELIMITER $$ -- Create a procedure in Oracle. CREATE PROCEDURE hello_world() BEGIN -- Print the phrase and a line return. SELECT 'Hello World!'; END; $$ -- Reset the delimiter back to a semicolon to work again. DELIMITER ; -- Call the procedure. SELECT 'CALL hello_world' AS "Statement"; CALL hello_world();

  8. Simple SP Why do we change the delimiter? DELIMITER ;

  9. Calling SP

  10. SP Examples

  11. SP

  12. Calling SP from PDO http://www.mysqltutorial.org/php-calling-mysql-stored-procedures/ http://www.php.net/manual/en/mysqli.quickstart.stored-procedures.php http://www.joeyrivera.com/2009/using-mysql-stored-procedures-with-php-mysqlmysqlipdo/

  13. Functions Function MUST return a value, Procedure does not have to. Function invoked within an expression, Procedure invoked with Call

  14. Looping Constructs http://dev.mysql.com/tech-resources/articles/mysql-storedprocedures.pdf#page=21&zoom=auto,0,792

  15. Cursors http://dev.mysql.com/tech-resources/articles/mysql-storedprocedures.pdf#page=35&zoom=auto,0,792

  16. How to backup a db MySQL has functions for backing up entire db - includes tables + procedures + functions + .. http://www.thegeekstuff.com/2008/09/backup-and-restore-mysql-database-using-mysqldump/ Backup: $ mysqldump-u root -p sugarcrm > sugarcrm.sql Learn to backup your db regularly

  17. How to restore a db http://www.thegeekstuff.com/2008/09/backup-and-restore-mysql-database-using-mysqldump/ Restore: $ mysql -u root -p sugarcrm < /tmp/sugarcrm.sql

  18. Triggers A trigger is a SQL statement that is executed (or “fired”) when another event occurs. For example, a trigger may fire when you insert data into a table, update a table, delete a row, etc. Work through the examples: https://dev.mysql.com/doc/refman/5.0/en/trigger-syntax.html

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