duplicate or clone MySQL database table

Many will facing issue when try to duplicate or clone database table in MySQL.
Below is the script and it's tested working well.

New table: tbltransaction_new
Existing table: tbltransaction

CREATE TABLE tbltransaction_new LIKE tbltransaction;
INSERT tbltransaction_new SELECT * FROM tbltransaction;

MYSQL Error 1053: The service did not respond to the start or control request in a timely fashion

I'm running mysql in windows server 2003 and was running well all the while. Today, my colleague execute some script and cause mysql hang. So, we have decided to restart the server. After restart the server, window service show that mysql in starting status after 20 minutes. So, i have decided to kill the process in task manager and start the service manually.

Then i hit error message  "Error 1053: The service did not respond to the start or control request in a timely fashion" and fail to start mysql. I've tried to restart windows server again but it doesn't work. I'm not sure what is the reason. What i decided to do is take out the database my colleague work with previous and try to restart mysql service again. Where is mysql data file store? The location can be found in my.ini file.In my case, my file is stored in "C:\Documents and Settings\All Users\Application Data\MySQL\MySQL Server 5.1". I cut the paste the database out of the folder and restart mysql. It's work!!

Hope this experience can share with friend who hit the similar scenario. For friends who face the same error, maybe this link might helps http://support.microsoft.com/kb/886695

How to view Mysql Stored Procedure in PhpMyAdmin

How to view Mysql Stored Procedure in PhpMyAdmin?

1. In PhpMyAdmin, select the correct Database on the left hand panel
2. You can see all the database tables in the right hand panel
3. Scroll down the right hand panel until the end, you will see Routines
4. Click on Routines
   
   
5. Once click on Routines, all the Stored Procedure will be displayed on screen
   
   

Mysql very slow for certain schema

I have a database/schema name inventorysoftware and have a .net windows application running on this schema. The issue is, the application run very slow on this schema (like each click need to wait about 30 seconds). I have about 40 others schema running in my development machine with windows XP Pro.

I have tried to google around the issue but can't find any similar problem. One thing i need to mention here is i have about 15 schema with name inventorysoftware_ddmmyy where dd=day, mm=month, yy= year. You know, developer like to keep the backup schema for testing. After the application deployed to customer, i decided to clean my 15 schema with name inventorysoftware_ddmmyy .

After i have deleted the schema, my application move very fast. I found the root cause for the slowness. Lesson learn, don't use the schema starting with the same name. It will kill you.

MYSQL - IF NOT EXISTS ... INSERT INTO

Database MYSQL - tried IF NOT EXISTS ... INSERT INTO but not working.

IF NOT EXISTS (SELECT * FROM tblabc WHERE id = 10547) THEN
INSERT INTO tblabc
(a, b, c)
SELECT a , b, c
FROM tblabc WHERE id = 10547;
END IF;


Finally, this work

INSERT INTO tblabc
(a, b, c)
SELECT a , b, c
FROM tblabc WHERE id = 10547
AND NOT EXISTS (SELECT * FROM tblabc WHERE id = 10547);

MySQL scheduler job / event

In order to have MySQL event run, we need to make sure GLOBAL event_scheduler is set to on or 1.

SET GLOBAL event_scheduler = ON;

Or we can set in my.ini (in windows) or my.cnf (in linux) file with value

event_scheduler=on

Then create a scheduler job in MySQL. Example, i wish to call a stored procedure psp_DailyJob() every day start from 12:25:00.

CREATE EVENT CallDailyJob
ON SCHEDULE EVERY 1 DAY STARTS '2011-07-18 12:45:00'
DO
      CALL psp_DailyJob()

Search text in MySQL stored procedure

Search keyword or text in MySQL stored procedure

SELECT * FROM INFORMATION_SCHEMA.ROUTINES
WHERE ROUTINE_DEFINITION LIKE '%IsConsignment%'
Order by Routine_Name;

You can't specify target table 'xx' for update in FROM clause

Try to update a column in MySQL which uses SUM and join and hit error "You can't specify target table 'xx' for update in FROM clause "

UPDATE tblstocktake ap SET TotalQuantity =
(
  SELECT SUM(t.Unitinstock)
  FROM tblstocktake t
  JOIN tblstocktake a
  ON a.productid = t.productid
  WHERE a.productid = ap.productid
  GROUP BY a.productid
);

Which is not working.

Finally, found a solution which is working

UPDATE tblstocktake LEFT JOIN
(SELECT productid,
SUM(unitinstock) AS baseVal
FROM tblstocktake
GROUP BY productid)
AS totalSum USING (productid)
SET totalquantity=baseVal;

Data too long for column 'xxxxx' at row 1

Try to update a column showContent which is boolean datatype in tbl_page table in mysql

UPDATE tbl_page SET showContent='1' WHERE pk=13

and hit error message "Data too long for column 'showContent' at row 1"

After try around and figure out below solve my issue

UPDATE tbl_page SET showContent=1 WHERE pk=13

Unable to retrieve stored procedure metadata. Either grant SELECT privilege to mysql.proc for this user or use "use procedure bodies=false" with your connection string.

Error receive when trying access to mysql database using windows application.
"Unable to retrieve stored procedure metadata. Either grant SELECTprivilege to mysql.proc for this user or use "use procedure bodies=false" with your connection string."

I'm using user "mrptest" connect to database and user "mrptest" has been granted to all privilage. The stored procedure created using 'root'@'localhost'.

To overcome this problem, i need to to drop all the created database and change the statement from CREATE DEFINER=`root`@`localhost` PROCEDURE to CREATE DEFINER=`mrptest`@`%` PROCEDURE

DELIMITER $$

DROP PROCEDURE IF EXISTS `psp_AAA` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `psp_AAA`()
BEGIN

END $$

DELIMITER ;

Now i change to

DELIMITER $$

DROP PROCEDURE IF EXISTS `psp_AAA` $$
CREATE DEFINER=`mrptest`@`%` PROCEDURE `psp_AAA`()
BEGIN

END $$

DELIMITER ;

Problem solved.

MySQL Server 5.1 data folder

My development machine have MySQL server 5.0 installed and i upgrade to version 5.1.

After i've installed MySQL server 5.1, i can't found the data folder which normally in "C:\program files\MySQL\MySQL Server 5.0\data" for version 5.0.

Finally able to get the location in in "C:\Users\All Users\MySQL\MySQL Server 5.1\data" for Windows Vista

If you are using windows XP, it's in "C:\Documents and Settings\All Users\MySQL\MySQL Server 5.1\data"

Hope this help

MS SQL profiler like for mysql

I was looking around a software for MySQL that can work like MSSQL profiler which can monitor the SQL query executed. Finally i found one called Log Monitor which work well for me.


How it's work? Download Log Monitor. Open LogMonitor.jar file.


Connect to MySQL server, open a SQL Query window and run this script



SET GLOBAL general_log = 'ON';

Check on log file location in my.ini file (for windows user) or my.cnf (for linux user).

For windows user,

#Path to the database root

datadir="C:/Documents and Settings/All Users/Application Data/MySQL/MySQL Server 5.1/Data/"

Open Log Monitor and set "log file path" with the file name. 

Now, open another SQL Query window and run any script. You can see the query you run displayed in the Log Monitor.



Hope this help.

mysql 5.1 data folder / directory / location

I've installed new MySQL 5.1 to replace my MySQL 5.0. I cannot find my data folder. 
Finally, check my.ini file in MySQL 5.1 folder and found line below


datadir="C:/Documents and Settings/All Users/Application Data/MySQL/MySQL Server 5.1/Data/"


All data folder is in "C:/Documents and Settings/All Users/Application Data/MySQL/MySQL Server 5.1/Data/"

The timeout period elapsed prior to obtaining a connection from the pool. This may have occurred because all pooled connections were in use .. pool

Timeout expired. The timeout period elapsed prior to obtaining a connection from the pool.
This may have occurred because all pooled connections were in use and max pool size was reached.

My web app written is ASP.NET C# and database use MySQL.

To solve it. Close all your connection each time you have finishing your query.

Sys.WebForms.PageRequestManagerServerErrorException: an unknow error occured while processing the request on the server. ..status code returned .. 500

My situation:
Environment: ASP.NET, AJAX.NET and MySQL DB

I got error return when using one of the form written in AJAX.NET when calling MySQL Stored Procedure

Sys.WebForms.PageRequestManagerServerErrorException: an unknow error occured while processing the request on the server. the status code returned from the server was: 500



Well, after check around i found out that the problem is in the MySQL Stored Procedure case sensitive issue. Change the case and problem solved!

phpmyadmin and stored procedure

As far as i know, we are not able to view, edit stored procedure using phpmyadmin but we are able to drop/create stored procedure using phpmyadmin.

I try to create a mysql stored procedure using phpmyadmin and hit error below

Error

SQL query:

DELIMITER;

MySQL said:

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DELIMITER' at line 1

my original code:

DELIMITER $$

DROP PROCEDURE IF EXISTS `xxxweb`.`pp_pspbatch` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `pp_pspbatch`(
IN pBatchName VARCHAR(255),
IN pCountryID INT
)
BEGIN

xxxxx

xxxxx

xxxxx

END $$
DELIMITER ;

try below steps, it help to solve my problem
1. Go to any SQL tab in phpMyAdmin.
2. Directly below the SQL text area you'll see a text input labeled "Delimiter." In that field, enter "$$".

3. Modify the script become like below

DROP PROCEDURE IF EXISTS `xxxweb`.`pp_pspbatch` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `pp_pspbatch`(
IN pBatchName VARCHAR(255),
IN pCountryID INT
)
BEGIN

xxxxx

xxxxx

xxxxx

END $$

and run it. It works.

#1064 - You have an error in your SQL syntax; xxx corresponds to your MySQL server version for the right syntax to use near 'DELIMITER' at line 1

I try to create a mysql stored procedure using phpmyadmin and hit error below

Error

SQL query:

DELIMITER;

MySQL said:

#1064 - You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'DELIMITER' at line 1

my original code:

DELIMITER $$

DROP PROCEDURE IF EXISTS `xxxweb`.`pp_pspbatch` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `pp_pspbatch`(
IN pBatchName VARCHAR(255),
IN pCountryID INT
)
BEGIN

xxxxx

xxxxx

xxxxx

END $$
DELIMITER ;

try below steps, it help to solve my problem
1. Go to any SQL tab in phpMyAdmin.
2. Directly below the SQL text area you'll see a text input labeled "Delimiter." In that field, enter "$$".

3. Modify the script become like below

DROP PROCEDURE IF EXISTS `xxxweb`.`pp_pspbatch` $$
CREATE DEFINER=`root`@`localhost` PROCEDURE `pp_pspbatch`(
IN pBatchName VARCHAR(255),
IN pCountryID INT
)
BEGIN

xxxxx

xxxxx

xxxxx

END $$

and run it. It works.

MySql.Data.MySqlClient.MySqlException: Table 'xxx.xx_XxxxXxx' doesn't exist

Hit error when try to connect to MySQL in Linux from ASP.NET in IIS6. Seriously, the table is 100% Exist in the database but i hit error below:

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code. 

Exception Details: MySql.Data.MySqlClient.MySqlException: Table 'xxx. xx_XxxxXxx' doesn't exist

Well, finally find out that it caused by case sensitive on the table name. After i've change the name, it's work perfectly.

Access denied for user 'xxxx'@'xxx.xxx.xxx.xxx' (using password: YES)

Well, my scenario is connecting my ASP.NET 2.0 apps from IIS6 (window 2003 server) to MySQL (Linux) using ADO.NET Connector.

Hit error message when try to connect:
Access denied for user 'userxxx'@'xxx.xxx.xxx.xxx' (using password: YES)



It's quite worry because this is first time trying to connect from a .net web application is IIS to MySQL in Linux.

Prior to that, privileges must be granted in MySQL.
______________________________________________
mysql> grant all privileges on *.* to 'userxxx'@'xxx.xxx.xxx.xxx'
identified by 'xxxpasswordxxx' with grant option;
Query OK, 0 rows affected (0.00 sec)
______________________________________________

Finally, found that it's my own mistake. I've put in the wrong username and password. Check your username and password seriously before the connection.

Add more than one column to a table in MySQL

Sometimes we might need to add multiple column to a table in MySQL, sample below work perfectly

ALTER TABLE pp_batch_detail
ADD `user_id` int(10) unsigned default NULL,
ADD `user_name` varchar(255) default NULL,
ADD `date_request` datetime default NULL;