mysql-5 : Version of MySQL Starting with MySQL 5.0

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2answers
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Why is MySQL not using the index with the higher cardinality?

I have an index called source with cardinality of 1122 and a second index called state with cardinality of 22. MySQL keeps using the state index when when query SELECT C1 FROM tbl WHERE source = 'x' ...
2
votes
3answers
43 views

How to update cust_id from Customer table to order table Cust_id field while inserting customer name using trigger

I have two tables 1. Customer_details and 2. Order_details. 1.Customer_details table -->fields--> Cust_Id(Primary Key) and Customer_Name, 2.Order_details table --> fields-- Ord_Id(Primary ...
0
votes
1answer
214 views

How to removing or reduce the size of redo logs in MySQL cluster

Can anybody tell me that how can we reduce the redo log file size or can we remove the redo log file size in MySQL Cluster and also what will be the impact of it on performance of cluster.Also can we ...
1
vote
1answer
253 views

Can't remote access MySQL server running on Mac OS X

I have a MySQL server running on my work computer, which runs Mac OS X Maverick. I want to access it from home computer, which also has Mac OS Maverick. From terminal, if in 1 tab, I ssh into my ...
0
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2answers
949 views

How to force higher values of open_files_limit or table_open_cache?

I'm having a frustrating problem where setting my.cnf to values higher than I currently have them does not 'take'. This is MySQL 5.6.14 on MacOS X 10.8.3 I'm trying to address dropped connections ...
1
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1answer
35 views

ALTER TABLE - Rename a column

This got me nuts! I want to rename a column from read-more to read_more in blog table Tried all this: ALTER TABLE blog RENAME COLUMN read-more to read_more; ALTER TABLE blog CHANGE COLUMN ...
0
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1answer
141 views

Mysql query is very slow

I am developing a website like any other social networking site using mysql. I wish it give people suggestion to my users, and I have implemented this functionality in my application, but It is ...
0
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1answer
59 views

Mysql query in Database

How to get all the tables from database with all values in tables using single query.. I tried using $sql = "SHOW TABLES FROM $dbname"; $result = mysql_query($sql); $arrayCount = 0 while ($row = ...
3
votes
2answers
132 views

Problem in Fetching Result set in Desired Format

I have 2 tables having the following columns Person ------ person_id, first_name, middle_name, last_name Items ----- person_item_id, person_id, item_type, status, ordered_date The query is ...
2
votes
2answers
38 views

Find problematic MySQL users and databases

We have a MySQL 5.1 server that is an "open" service: anyone on campus can request a database. As such, we have several thousand databases on this one server. As you might imagine, sometimes one ...
0
votes
1answer
125 views

Two different MYSQl instances on same machine?

I have MySQL 5.6 installed (Linux). /var/lib/mysql /etc/my.cnf I have a cold backup that I am recovering: /var/lib/mysql_backup /etc/mybackup.cnf In April I was able to get the backup started ...
0
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1answer
45 views

MySQL rebuild after Corrupt ibdata1

I have a MySQL server that serves a couple of databases including a Magento e-commerce store. We have been suffering with corruption in the ibdata1 file for a while, but it has now reached a critical ...
2
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2answers
80 views

Why does MySQL fail to use an index effectively when LIMIT offset is large?

I do not understand when querying 5 rows from a table of 500,000 rows, the following query takes 0.00sec: SELECT id, username FROM Users FORCE INDEX (PRIMARY) ORDER BY id LIMIT 20,5; But querying ...
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0answers
20 views

On replicating all tables of a given database except for those starting with some pattern

I'd like a slave to replicate all tables of a given database except for those starting with some pattern, eg. those with names starting with 'nc' (non-critical, redundant denormalized tables). So I ...
0
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2answers
111 views

Getting table definitions on the command line in MySQL [closed]

I am new to MySQL. I am trying to get table definitions from the database server (4.0.26). I tried below steps to get information, running cmd as an administrator: c:\> cd mysql\bin\ ...
2
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1answer
1k views

mysql db backup excluding specific tables

Are there any mysql scripts for taking a database backup by excluding specified tables? Also, what is the best way to take backup of a running mysql system?
1
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4answers
4k views

Connect to MySQL (WAMP) via SSH

Hi I installed the latest WAMP on Windows 7. I would like connect via SSH to MySQL database and create dump. As SSH client I use PUTTY. I tried using the root account and also other accounts, but I ...
1
vote
1answer
972 views

Duplicate entry in mysql slave

I have a mysql master-slave replication setup. when I checked "show slave status", I got the result as "Slave_Sql_running:No" and Last error as "Duplicate entry 'x' on query." But when I tried to ...
0
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0answers
252 views

MySQL 5.6 Installation error on Windows 7

At the last step, when MySQL installer tries to configure, it fails with the following error message: mysql-server-5.6-winx64:50 - Started service. mysql-server-5.6-winx64:56 - Attempting to update ...
1
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1answer
199 views

mysql 5.1 — unknown variable 'basedir=c:/mysql/'

I recently changed the default port(3306) to another for mysql. I did it by changing the my.ini file and did restart of the server. No other changes were made whatsoever. When connecting using a GUI ...
1
vote
1answer
623 views

Selecting multiple columns from multiple rows in one column (subquery?)

I'm working with MySQL 5.1.68. I have a situation where I'd like to select rows from another table into a column. I'd like to output this: id # name # citizen_name (multiple citizen names) 1 # ...
4
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1answer
2k views

Setting up MySQL Cluster on Two Systems

I am attempting to setup a MySQL Cluster. I have the folllowing setup one management node two data nodes another machine on which two more nodes reside Below is the config.ini file: [ndbd ...
0
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1answer
1k views

How to select only first column dynamically on mysql

I have to select only first column. Because of i dont want to select all columns like SELECT * FROM table. But my first columns may vary like following: id article_id user_id product_id page_id etc.. ...
2
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0answers
91 views

Sleeping connections

I have a dedicated MySQL server(8GB) with following configuration. [mysqld] datadir=/var/lib/mysql socket=/var/lib/mysql/mysql.sock user=mysql lower_case_table_names = 1 ...
7
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3answers
8k views

Restore mysql database with different name

How can we restore mysql database with different name from mysqldump file. I dont't want to open dump file and edit it. Any other better methods?
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0answers
343 views

Update row to another table using mysql trigger

I have the following 2 tables (places & offer_company) in a MySQL database named COUPON1.81. CREATE TABLE IF NOT EXISTS `places` ( `id` int(60) NOT NULL AUTO_INCREMENT, `name` varchar(255) NOT ...
1
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1answer
1k views

My SQL 5.6.4 DATETIME column milliseconds is not getting stored

Beginning from MySQL 5.6.4, milliseconds support is provided for date columns like DATETIME etc. I just created a table to check if its working: create table testdata(startime DATETIME(5)); ...
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1answer
259 views

Calculating employee's work time

I need to store and analyze employee's work time. Currently, I've developed this table structure CREATE TABLE `hirefire` ( `id` int(10) unsigned NOT NULL AUTO_INCREMENT, `employeeid` int(10) ...
56
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6answers
40k views

How can I optimize a mysqldump of a large database?

I have a symfony application with an InnoDB database that is ~2GB with 57 tables. The majority of the size of the database resides in a single table (~1.2GB). I am currently using mysqldump to ...
2
votes
1answer
4k views

Change existing datadir path in mysql

I want to change the datadir path in the my.ini file. The existing datadir path is C:/ProgramData/MySQL/MySQL Server 5.1/Data/ The size of my C: drive is 30GB and the MySQL data folder is occupying ...
2
votes
1answer
7k views

MySQL case sensitive table names on Linux

Moving a MySQL database from Windows to Linux I have the problem that on Linux the names of the tables are case sensitive. This is a problem, because the Java application that I am developing can't ...
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0answers
54 views

Best practice for upgrading mysql on a master-master setup

Anyone have experience upgrading a master-master setup of Mysql 5.1 to a release version of Mysql while trying to keep at least one server online (in my case we are upgrading to MariaDB 5.5).
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2answers
65 views

Mysql Command required for getting values from my.cnf

I am new to MySQL DBA, i have a doubt, Is there any command for finding my.cnf configuration file variables and its respective value which is mention in my.cnf file in mysql prompt itself. like we ...
3
votes
1answer
120 views

MySQL 1264 warning from libmysql

I'm using the libmysql.dll library to connect to my database from a 3rd party application (metatrader). I managed to connect and things are going almost fine. I use mysql_real_connect and ...
1
vote
3answers
2k views

MySQL: Trying to update to 5.5

I've followed this instructions, but after mysqld --skip-grant-tables --user=mysql, I'm getting this: 110913 20:29:18 [Warning] Can't create test file /var/lib/mysql/my-laptop.lower-test 110913 ...
4
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3answers
9k views

Set “lock wait timeout” in MySQL

Where would I set the maximum time a query will wait for a lock in MySQL 5.0.68 before timing out?
3
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3answers
1k views

MySQL optimization - year column grouping - using temporary table, filesort

I have a transactions table which is having 600,000 records, I need to list the count for the dashboard on financial year basis. The table used is MyISAM. I tried adding index for the transaction date ...
0
votes
1answer
704 views

mysql duplicate entry error 1062 when restoring backup

Sorry, I seen similar threads but I still couldn't find it addressing my issue plus, I needed some more info on this. Requirement: To create an exact replica 'db4' of an existing DB 'db3'. Procedure ...
0
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1answer
396 views

Why would mysql “show global status” query be taking 15 minutes?

I'm reviewing the slow log, and on one of my slaves the average time for SHOW GLOBAL STATUS is 914s. Any idea how to determine the cause of this?
0
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0answers
373 views

mysql deadlock while updating: ERROR 1213 (40001): Deadlock found when trying to get lock; try restarting transaction update

I am using the mysql version 5.5.29 in my production server. while executing set of update statement inside the procedure it is throughing the following error: ERROR 1213 (40001): Deadlock found when ...
1
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2answers
92 views

Where condition execution sequence in MySQL

I am using MySQL 5.0.88. I have a query like: select DISTINCT party.­id FROM party­ LEFT join party_­identifier AS pi ON pi.­party_­id = party.­id­ WHERE ­(pi.­source_­note=? AND ...
2
votes
1answer
1k views

Allocating 8GB memory to MySQL on a 64bit system

Specs - MySQL 5.0.x , Redhat 5.9 , Physical memory - 16GB I am trying to set innodb buffer pool size to 8GB (innodb_buffer_pool_size=8G). When i do, and start mysql, i get following error - ...
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2answers
287 views

Insert ignore with conditional

I need to insert some records which might have duplicates. Column to overwrite/skip is mytable.email and mytable.fooFlag should be 1. I came up with something like this: INSERT IGNORE INTO mytable ...
0
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2answers
77 views

Indexing is not working

Following is the table and index information for which I have the queries at the end. Create Table: CREATE TABLE `food` ( `id` int(10) unsigned NOT NULL DEFAULT '0', `page_no` int(11) DEFAULT ...
1
vote
1answer
732 views

Where is the MySQL variable - innodb_flush_method?

I would like to tweak the value of innodb_flush_method to find out its performance impact on a database server. That variable is listed when I run the command SHOW VARIABLES. But I could not find it ...
0
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0answers
237 views

UPDATE / SELECT incredibly slow in MySQL InnoDB

I have 1 table with 2.5 billion records(2.5 Cr.) and I am trying to get count of records based on indexed column. it takes 115 seconds to execute same. Query : Select count(1) from table1 where ...
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votes
1answer
216 views

where can I get mysql-5.1.7.tar.gz or mysql-5.1.9.tar.gz? [closed]

I need mysql-5.1.7.tar.gz or mysql-5.1.9.tar.gz, but I can not find them anywhere, who can give me a link to find them, thank you very much!!!
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0answers
19 views

Maximum storage limit for mysql using Windows 7 ,32 bit NTFS system? [duplicate]

I would like to know the maximum size limit for mysql server running in windows 7,32 bit NTFS System.I have 8 tables
1
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1answer
314 views

Is it okay to have different lower_case_table_names value on master and slave?

I have a OSX MySQL master with lower_case_table_names set to 2. I have just setup a Linux MySQL slave with lower_case_table_names=1. I haven't started replication on the slave, but everything looks ...
2
votes
1answer
2k views

Migrating MySQL 5.0 to 5.5 - simple databases

I have a LAMP server on my LAN running a very old version of RedHat with MySQL 5.0, and I'm trying to migrate it to Ubuntu 12.04 to update it. I know the advice is to migrate MySQL 5.0 to 5.1 then ...