 User Account Management  User Privileges  Administrative Privileges  Database Access Privileges  Creating and Rename User Account  Drop User Account  Grant Privileges  Revoke Privileges  Routines and Triggers

1. MYSQL USER MANAGEMENT
ROUTINES & TRIGGERS
D.PRABHU RAJA SINGH
MySQL DBA

2. AJENDA
 User Account Management
 User Privileges
 Administrative Privileges
 Database Access Privileges
 Creating and Rename User Account
 Drop User Account
 Grant Privileges
 Revoke Privileges
 Routines and Triggers
2 out of 22

3. USER MANAGEMENT
 To manage MySQL account for clients that connect to MySQL server
to access databases.
* The grant tables used to store account information.
* The SQL statements used for account management.
3 out of 22

4. USER ACCOUNT MANAGEMENT
 In mysql the concept of account is combined with two things: a
user name and a host name.
 When you connect to the server, it checks only the user name that
you specify, but also from what host you are connecting.
 Format: ‘user_name’@ ‘host_name’
Ex: ‘rose’@‘localhost’
 Account management statements such as CREATE
USER,GRANT,REVOKE OR SET PASSWORD.
4 out of 22

5. USER PRIVILEGES
 It mean a special advantages is given to an user account like
select,insert,update,delete etc at different levels.
 Two types of privileges, one is administrative privileges and
other is database privileges.
 Administrative privileges access the account in mysql.
 Database privilege control to access the data stored in
databases.
5 out of 22

6. ADMINISTRATIVE PRIVILEGES
6 out of 22

7. DATABASE ACCESS PRIVILEGES
7 out of 22

8. CREATING & RENAME USER ACCOUNT
 CREATE USER creates a new account and optionally assign it a
password.
 It does not grant any privileges.
 Syntax:
CREATE USER ‘USER_NAME’ @ ‘HOST_NAME’ IDENTIFIED BY
‘PASSWORD’;
-Ex: create user ‘rose’@ ‘localhost’ identified by ‘stem123’;
8 out of 22

9. CREATING & RENAME USER ACCOUNT
 The above statement creates an account for rose@localhost and
assign the account a password of “stem123”.
 Alternatively we can give GRANT to create the account and grant it
privileges at the same time.
-Ex: Grant all on *.* to ‘rose’@ ‘localhost’ identified by ‘stem123’;
 To rename the user account use this statement as RENAME USER.
9 out of 22

10. CREATING & RENAME USER ACCOUNT
 Syntax:
RENAME USER ‘old_user_name’@ ‘old_host_name’ To
‘new_user_name’@ ‘old_host_name’;
Ex: Rename user ‘rose’@ ‘localhost’ to ‘flower’@ ‘localhost’;
 To check the created user in MySQL by using Select command.
 Syntax:
SELECT USER,HOST FROM MYSQL.USER;
 It will show the list of user with hostname in the user account.
10 out of 22

11. CREATING & RENAME USER ACCOUNT
 How to set password for a user and change the password for a user.
 Syntax:
SET PASSWORD for [‘USER_NAME’@ ‘HOST_NAME’]=PASSWORD(‘12345’);
 After change the password to get update in that user account we
need to do flush privileges to get update.
 Syntax:
FLUSH PRIVILEGES;
11 out of 22

12. DROP USER ACCOUNT
 It deletes all records for the account from any grant table in which
they exist.
 It revokes all privileges for an existing account and then removes
the account.
 To revoke the privileges without removing the account itself, use
the revoke statement.
 Syntax:
DROP USER ‘user_name’@ ‘host_name’;
Ex: drop user ‘flower’@ ‘localhost’;
12 out of 22

13. GRANT PRIVILEGES
 It is use to give the authority for the mysql user accounts
databases.
 To see grant privileges in an account.
 Syntax: SHOW GRANTS;
 Grant privileges can exists in different levels.
13 out of 22

14. GRANT PRIVILEGES
1)Global levels:
Any privileges can be granted globally. Global privileges are
quite powerful and are normally granted only administrative
accounts. Applied to all databases on a given server.
Syntax: GRANT ALL ON *.* to ‘user’@‘host_name’
Ex: grant all on *.* to ‘rose’@‘localhost’;
In this we can do insert, delete,update,etc in global level
statement.
14 out of 22

15. GRANT PRIVILEGES
2)Database level:
Some privileges are granted for specific databases:
ALTER,CREATE,CREATE TEMPORARY TABLES,CREATE VIEW,
DELETE, DROP, GRANT, OPTION,INDEX,INSERT,LOCK TABLES,
SELECT,SHOW VIEW AND UPDATE. A database level privileges
applies for all tables and stores routines in the databases.
Syntax: GRANT ALL ON DATABASE_NAME .* to ‘USER’@
‘HOST_NAME’;
Ex: grant all on redrose.* to ‘rose’@‘localhost’;
15 out of 22

16. GRANT PRIVILEGES
3)Table level:
Some privileges granted for specific tables:
ALTER,CREATE,DELETE,DROP,GRANT,OPTION,INDEX,INSERT,SELEC
T AND UPDATE. A table-level privilege applies to specific table in a
database.
Syntax: GRANT ALL ON DB_NAME.TABLE_NAME to ‘USER’@‘HOST_NAME’;
Ex: grant all on redrose.price to ‘rose’@‘localhost’;
16 out of 22

17. GRANT PRIVILEGES
4)Column level:
Some privileges granted for specific table columns:
INSERT,SELECT AND UPDATE.
Syntax: GRANT ALL ON DB_NAME.TBLE_NAME.COLUMN_NAME TO
‘USER’@‘HOST_NAME’;
Ex: grant all on redrose.price.low to ‘rose’@ ‘localhost’;
5)Routine level:
Some privileges can be granted for specific stored routines:
EXECUTE,ALTER,ROUTINE AND GRANT OPTION.
17 out of 22

18. REVOKE PRIVILEGES
 It enables system administrators to revoke privileges from MySQL
accounts(Break the rules and regulations that given by GRANT to the
user account).
Syntax: REVOKE privilege_type [(column_list)] ,[priv_type
[(column_list)]]...ON [object_type] privilege_level FROM user [‘user’]
Ex: revoke all privileges, grant option from‘rose’@‘localhost’;
18 out of 22

19. ROUTINES AND TRIGGERS
 Routines (otherwise known as stored procedures and stored
functions).
 When used in conjunction with each other MySQL stored procedures
and triggers will provide a database that all but runs itself.
 A MySQL stored procedure is a block of code stored on the server
will normally carry out a series of SQL statements.
19 out of 22

20. ROUTINES AND TRIGGERS
 This is particularly useful because:
 client applications need to know nothing about the structure or the
content of a database - they just need to know how to run any
MySQL stored procedures
 any changes in procedures can be made via the stored procedures -
those changes will automatically be used by client applications
without the need to modify the applications
 A stored procedure can only be run by some one or something and
that's where the MySQL trigger is used.
20 out of 22

21. ROUTINES AND TRIGGERS
 A MySQL trigger is a piece of code that fires whenever something
happens to a table, and that something can be one of three table
events.
Delete - the trigger fires if something is deleted from table.
Insert - the trigger fires if something is inserted into the table.
Update - the trigger fires if the table is updated.
 There is a further refinement as well - the trigger may be fired:
Before the event occurs.
After the event occurs.
21 out of 22

22. THANK YOU
22 out of 22