Experimental thirteen MySQL multi-user transaction management

Experimental thirteen MySQL multi-user transaction management

First, the Experiment:

1, using the transaction mechanism

2, the lock mechanism

Second, the pilot project: staff management database

Staff management for enterprise database management, database named YGGL in, YGGL database consists of three tables: Employees (employee information table), Departments (department information table), Salary (staff salaries Fact Sheet).

Third, the experimental procedures required to complete the following :( command)

1, all the rights of all objects in the database YGGL grant a new user u1 @ localhost;

2, off automatic submission;

3. Check whether the Departments table storage engine is Innodb, if not, modify the Innodb;

4, modified terminator;

5, create what matters: 1) transaction begins 2) insert a record into the Departments table; 3) modifying a record; 4) terminator perform operations 5) using a select statement to see departments recorded in the table; 6) to open a new window with the u1 log in and view the departments table records check for the difference, think about why? 7) transaction retraction; 8) Terminator execution; 9) again using the select statement to see the departments table records; and u1 user window again to see the departments table records the outcome?

6, to create what matters: 1) transaction begins 2) insert a record into the Departments table; 3) modifying a record; 4) terminator perform operations 5) using a select statement to see departments recorded in the table; 6) to open a new window with the u1 log in and view the departments table records check for the difference, think about why? 7) the transaction is committed; 8) Terminator execution; 9) again using the select statement to see the departments table records; and u1 user window again to see the departments table records the outcome?