MySQL version 5.5 - please also tag with mysql for search purposes.

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MySQL: physical table vs temporary table

This question is part of this question MySQL: excessive memory usage I am in process of debugging MySQL high memory usage, I need to know the difference and impact of the physical tables and ...
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MySQL: excessive memory usage

In our production system, MySQL service uses above 95 % of the available memory. System Info: OS: CentOS 6 RAM: 32 GB CPU: 4 core MySQL version: MySQL 5.5 Database Size: 158 GB my.cnf info: # ...
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MySQL 5.5 to 5.7 doesn't work, apparently this is a feature?

Has anyone found a way yet of circumventing MySQL 5.7s insistence that it's Master must have a server_UUID. I currently have multiple instances of MySQL 5.5 over various sites, and want to look at ...
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mysql replication and GRANT that doesn't quite grant

I am trying to set up mysql replication. All's well, but I see an error 1045 for the slave: mysql> show slave status\G *************************** 1. row *************************** ...
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Is there a way to set bind_address from command line in mysql 5.5 without restarting?

I made a modification to bind_address in my.cnf that knocked down a monitor. It has been repaired since, firewall allowing the monitor IP in. However, mysql is still running in its previous state ...
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Query Across Multiple MySQL Databases

The majority of our clients use the same MySQL schema and a number (subject to the usual conditions) are willing to give us a copy of their data for research. I have written a utility which merges the ...
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Check MySQL database growth

I need to check the growth rate for my database (MySQL 5.5). So far I found only a query that answers me the current size - despite the title of the article - (How to check growth of database in ...
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MySQL Replication Duplicate Entry for Primary Key

160523 13:07:29 [ERROR] Slave SQL: Error 'Duplicate entry '914166' for key 'PRIMARY'' on query. Default database: 'zo_dev_20121216'. Query: 'UPDATE activity SET activity_type_id = 9, ...
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DDL doesn't work in MySQL master to master replication while DML can work?

I have two master in replication left master -> 5.5.47-log MySQL Community Server (GPL) rigth master ->5.5.47-log MySQL Community Server (GPL) "left master" mysql> create table test.left ...
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MySQL 5.1 - Display the error-message returned inside a stored precedure

I'm trying to find an alternative to display the error-message returned from MySQL-5.1/5.5 inside a stored procedure. The example below is what I'm looking for, however it's seems to be only allowed ...
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32 views

Display the error message returned form Mysql

I need to get the whole error message returned from MySQL and assign it to @error_string : DECLARE CONTINUE HANDLER FOR SQLEXCEPTION BEGIN SET @error_string = ...
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Centos 7 install MySQL5..5

Install MySQL5.5 in CentOS7 by following instructions on this page: A Quick Guide to Using the MySQL Yum Repository After that start the service: service mysqld start This returns the error: Job ...
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Calculate Growth rate

I'm trying to calculate purchase/profit growth rate in different time periods, This is the query i've come up with (View in SQLFiddle): Schema: CREATE TABLE `profit_log` ( `market_id` smallint(6) ...
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Mysql 5.1 vs Mysql 5.5+

What is the difference between partitioning 5.1 vs 5.5 version. can someone eleborate the differences because Mysql5.1 also does Partitioning.
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Upgrading to MySQL 5.5 from 5.0 looks broken

I was using SLES SP3, and had earlier MySQL 5.0.67. I upgraded it to 5.5.48 (available with the CD) after upgrading my OS to SP4. I edited the /etc/my.cnf file, and replaced skip-locking to ...
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MySQL master- master replication

I am in the process of setting up Master - Master replication between 2 servers on a production environment. My settings are as follows, Existing System: Server 1: Status: Master databases: db1, ...
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68 views

After update triggers that deal with multiple column updates

I want to create a table for audit (audit in the sense of recording whatever a user has done in terms of data manipulation – e.g. update first name, delete contact etc.). For that I need to write a ...
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Server memory consumption not changed after innodb buffer size change

I observed a strange thing while applying the innodb_buffer_pool_size on mysql. I applied the innodb_buffer_pool_size=20G (75% of my physical RAM size) and as per logs and innodb status the mysql is ...
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MySQL binary log reporting execution time as UINT_MAX

Looking through the MySQL Binlogs, I see some data that just does not make sense. There are queries that say they have been running for 4294967295 seconds (which also happens to be UINT_MAX on this ...
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MySQL Upgrade query

I have 5.5.44-log MySQL Community Server (GPL) running in one of my RHEL 6.4 server. I need to upgrade the server to Percona Server-5.6.29-76.2. How to go about the upgrade? Should I completely remove ...
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48 views

Host not Allowed Connectivity to MySQL Server

I currently have a website and it references mySQL database. The website uses HTML, CSS and PHP. PHP code embedded inside HTML website, fetches a value and stores it on the SQL database. Then the ...
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What is the maximum value for the index_length of a MySQL 5.5 table?

I'm trying to find out why a series of inserts is painfully slow (1 minute 15 seconds, on average) on a dedicated MySQL 5.5.47 server, while the same inserts are normally fast (less than 5 seconds) on ...
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How do you properly remove “REQUIRE SSL” from a single user?

I successfully granted REQUIRE SSL to a single user by doing... mysql -u"${targetMySqlUser}" -p"${targetMySqlPass}" -e "GRANT USAGE ON dbname.* TO 'dbusername'@'%' REQUIRE SSL;" but im failing on ...
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MySQL dies at same time by night [closed]

my MySQL Database dies every night at around 11p.m. and I have absolutly no idea whats the problem. Maybe you can help me: The error.log says: 160412 11:37:13 [Warning] IP address '123.158.49.205' ...
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Very Very Veeery slow insert queries

I am writing here because I`ve already spent days reading tutorials, other topics in here, and trying different configurations. The project : Fashion website with ~200k products which should be ...
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Boosting select queries during INSERT ON DUPLICATE KEY UPDATE into 150Gb innoDb table

I have a single server with 2 innoDb tables: 35Gb (partitioned, 24M rows), 150Gb (without partitioning, 220M rows). 25% data, 75% index. 99% of select queries are SUM + WHERE + GROUP BY. 100% of ...
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MySQL Killed by OOM after Corrupted Database

One of our web-app servers recently had an issue where MySQL was taking more memory than we have physical RAM. This server has 64GB of memory and 8GB in swap, and MySQL was OOM-ed because it was ...
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How to properly change “innodb_buffer_pool_size” value for mysql?

I have following environment: # cat /etc/redhat-release CentOS Linux release 7.2.1511 (Core) # rpm -qa | grep ^mysql-community- mysql-community-common-5.5.48-2.el7.x86_64 ...
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Inserting rows with WHERE condition

Structure 1 table named: scan 2 columns named: id, and date Problem I have two working queries, a SELECT and then an INSERT which I would like to merge together creating a INSERT where the ...
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What is the difference between CREATE INDEX and ALTER TABLE ADD INDEX? [duplicate]

I have searched the web but I have failed to find a conclusive answer for this question. Is there any difference between CREATE INDEX and ALTER TABLE ADD INDEX? Are there any problems that may ...
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Why does this SQL work on one version of MySql-Server but not another?

I'm trying to run the following very simple SQL command on two different MySQL databases: CREATE TABLE mytable ( created DATETIME(6) NOT NULL, updated DATETIME(6) NOT NULL, my_id ...
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how to force mysql 5.5 server to allow tls/ssl encrypted connections only?

given a mysql Server 5.5 community edition (which came with SLES 11sp4). i configured it to support TLS and it works fine. but i did not found any options or parameters to FORCE IT to do TLS/SSL ...
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Listing rows with a WHERE condition

I am struggling with a SQL query that lists hosts that are offline. Problem The problem occurs when I need to list hosts that don't have any ports open (status = 0), so looking at the table at the ...
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how to “revoke” a “GRANT OPTION” from an mysql user/database?

i have a mysql installation with lots of users and grants. But one grant is unique, since its supposed to be a simple DB user and usually does not need GRANT privileges. However someone added it when ...
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Different behavior between MySQL 5.5 and 5.6

I have this schema with data: CREATE TABLE `ticket` ( `id` INT NOT NULL, `name` VARCHAR(45) NULL, `type` INT(11) NULL, PRIMARY KEY (`id`)); CREATE TABLE `task` ( `id` int(11) NOT NULL, ...
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Can't connect to MySQL server via SSL

I'm trying to connect to a MySQL server via SSL. I know the server is set up correctly to handle SSL connections because I can connect fine using MySQL workbench, PHP, and command line MySQL client ...
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Cannot open some tables in phpmyadmin

Recently i get backup of my database from host in that backup i get table in .ibd,.frm,.myd format . I placed this files in xampp->mysql->data->test . Now i can open the tables in php ...
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Trigger query fails to execute because of local variable

I have the following table: |-------------------------------------| |Column |Type |Null|Default| |-------------------------------------| |//**id**// | bigint(11) | No | | |soldier_id ...
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Counting rows from a subquery

Simple: I would like to count the number of rows from the sub-query. Note that status is whether the host is online or not. Bad code SELECT COUNT(ip_address) FROM `ports` ( SELECT DISTINCT ...
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MySQL SELECT n-th row between dates (time interval)

I have a server which records various sensor data each second and inserts it into a MySQL table. To view the sensor data on a dashboard I have a chart which also gets updated with live data each ...
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can't I use Current_timestamp as default value in mysql 5.5.47-cll

I am not able to set Current_timestamp as default value. My Mysql version is 5.5.47. Query is ALTER TABLE `downloads` ADD `date` DATETIME NOT NULL DEFAULT CURRENT_TIMESTAMP ; While it is working ...
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44 views

Incorrect backup size

We are storing our everyday full backup in remote storage. Everything seems to be working fine, but every seven day interval the archived folder size is much more than the everyday archived backup ...
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MySQL allows records longer than varchar(N)

We have a database with a field of type VARCHAR(255) but in it I can see some records having a length of larger than 255, such as 264. How can it be possible? Can it be that the database is corrupt? ...
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46 views

Select rows with most recent date for the given date

I have a table to manage the stock which looks like below product batch qty date Grape BAT0 42 10/3/2016 Apple BAT1 12 11/3/2016 Banana BAT2 15 11/3/2016 Orange ...
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MySQL. Capture Cis program makes incorrect query: SELECT DISTINCT “PartType” FROM “Capacitor” ORDER BY “PartType”

I am having problems to get one database running. I have a MySQL in my server, the server is running "5.5.48-MariaDB - MariaDB Server" with "UTF-8 Unicode (utf8)" I have a MySQL ODBC 64 bits 3.51 ...
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SQL query to compute longest travel time for each id number

I am a novice in SQL and I have a problem as follows. There are two tables TRNSCTN_TAB: CREATE TABLE TRNSCTN_TAB( `transactionId` int , `UniqueId` int , `transactionTimeStamp` ...
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MySQL 5.5 client SSL connection only works when adding cipher list argument, why?

I set up the packaged MySQL server 5.5 and client on two Ubuntu VM. I configured the server to support SSL. I can connect to the server with the MySQL CLI tool between the VMs, but the connection is ...
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What configs influence whether user credentials/grants are written to the binlog in Mysql

I have a fairly trivial master-master setup. When testing this setup I see that mysql users are binlogged and replicated on slaves. However on each of the masters the binlog-do-db* is for a specific ...
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Cannot give privileges after upgrade from mysql 5.1 to 5.5.46

When I try create a user on phpmyadmin it gives me these errors: #1133 - Can't find any matching row in the user table The selected user was not found in the privilege table This is the command it ...
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EXPLAIN SELECT query is writing to tmp table

I am getting a "copying to tmp table" when running an EXPLAIN SELECT on a query. This is a pseudo-query showing the structure of the query (I can't post the actual query): SELECT colA , colB , ...