mysql-5 : Version of MySQL Starting with MySQL 5.0

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3
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2answers
186 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 ...
0
votes
1answer
23 views

Exclude entries from SELECT COUNT

I'm new to MySQL and I have a problem with one task. I have a table like this: +------------+------------+-------------+ | code | name | location | ...
1
vote
3answers
152 views

Question on having a MySQL 5.1 replicate from a MySQL 5.6 DB

I have a question in regards of what potential issues that might happen with a MySQL 5.1 DB that replicates from a MySQL 5.6 DB. I know the risks involved based on resources such as ...
1
vote
1answer
505 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 ...
0
votes
1answer
305 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 ...
3
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2answers
163 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
1answer
4k 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
227 views

How to select the latest record of each hour in a day

I want to select the latest record of each hour in a given date, based on the datetime column 'reading_on' in my table , what is the best way to do it. I already tried group by HOUR(reading_on) with ...
0
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2answers
4k 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 ...
0
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1answer
95 views

Table Design for Student Attendance hourly for each day

I have created a table(attendance_details) for storing every day attendance of Students in MySQL. Need to capture attendance for hourly(1-8hrs) for every day. I have the student details in separate ...
4
votes
2answers
13k 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
votes
1answer
33 views

MySQL UTF-8 Encoding Problem

I have two MySQL databases that are for Wordpress websites. One db is for a live version of a site, the second is a copy of the original that is used in conjunction with a copy of the original site. ...
6
votes
1answer
15k 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 ...
0
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1answer
37 views

Trying to avoid bad MySQL database design - can't figure out how to avoid too many columns

I am pretty much a beginner having only created a few small php web applications relying on a MySQL database. I am now working on a somewhat larger project. I am in the planning stages of setting up ...
2
votes
2answers
176 views

SELECT WHERE CASE

I have the following table (MySQL): -------------------------------------------------------- | id |product_id| store_id | stock_id | priority | ...
80
votes
7answers
71k 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 ...
1
vote
3answers
675 views

MySQL: How to avoid case sensitivity in SQL queries when migrate from Windows to Linux?

I have migrated my Database from Windows to Linux server. In many places, query has been written without focusing their cases (uppercase / lowercase). So, these queries are not getting executed and ...
1
vote
1answer
76 views

Find clients who bought more than 1 million units in 3 consecutive months

I want to find the client's code (cCode), who bought more than 1 million units, in three consecutive months. Here is my data: gDate cCode buy 2014-10-22 15108164 1653410 2014-12-22 ...
1
vote
1answer
50 views

How to properly aggregate?

I have a table for logs with over 6 million records. I want a query that shows me all the occurrences where the src goes to the same destination/port. I tried this: SELECT src, dst, dstport, ...
0
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0answers
543 views

Combine and display multiple row data with same column data in MySQL

I have a menu, from where every item ordered is stored in a row. For a single order, there can be multiple rows.What I want is that when I display it, for same order_number ( number) all rows data is ...
1
vote
1answer
76 views

mysql multi-source replication to single slave from Debian repo's?

I've been experimenting with mysql 5.7's feature to backup multiple sources to a single slave, but have legacy db's on source servers where I'm not sure if upgrading to 5.7 will break things, and also ...
10
votes
5answers
17k 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?
0
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0answers
26 views

Waiting for table level lock - Info says NULL> What could be causing this lock?

This is from one of our Slave servers in a master-slave replication setup. What could be causing the locak mentioned in the 2nd line? Under info it shows only NULL. And it does not have anymore info ...
4
votes
1answer
3k 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 - ...
2
votes
2answers
3k views

Is there any way to recover a database after dropping from phpmyadmin?

I was planning to drop all the tables from a test account, but unfortunately, I didn't notice that I was in the production account when I chose to drop all the tables of my db from phpmyadmin ...
1
vote
1answer
115 views

Is there a way to run mysqldumpslow against slow queries logged to a table?

AWS RDS by default logs slow queries to a database table. Is there a way to run mysqldumpslow against that table, without exporting it to a file first? Or is there a better way to get a report of ...
0
votes
1answer
40 views

Mysql query performance

We have a database table and we found a weird query from old code. We can't really explain it, so we decided to analyze why it could have been done that way. The weird thing is that the results are ...
0
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0answers
17 views

MySQL stops unexpectedly on CentOS 6.5 with WHM/Cpanel after migrating server with transfer tool [duplicate]

I recently moved my entire websites from a dedicated CentOS5 server to a CentOS 6.5 on Amazon EC2 with the same cPanel/WHM version. WHM 11.44.1 (build 19) However after angry calls from clients I ...
0
votes
4answers
101 views

Why does this query take 32 sec to execute?

I keep my history records in one table and my pertinent data in another. I want to grab only the files from myfiles that currently have a given status recorded in statuses (ie, the latest status is ...
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2answers
89 views

Fourth inner join to the same table increases query duration significantly

As soon as I add a fourth inner join to a specific table, the query duration increases significantly: sub 1sec to 45sec. The table in question is deployments d4. The SQL Query: select a.id as ...
0
votes
2answers
91 views

How to check/change MySQL named pipe settings?

I'm having a hard time finding anything on this because I don't know what to call it. But when you install MySQL it asks you if you want to allow connections to the database from other machines or ...
0
votes
2answers
77 views

How to rewrite subquery to return only 1 row

I need to somehow check if query result is NULL, MySQL returns error Subquery returns more than 1 row. How should I rewrite it in order to work correctly please? SELECT DISTINCT user.id, ...
0
votes
1answer
44 views

Importing Data with Single .ibd file

I have one ".ibd" file with me. I have configured my local Database server with FILE_PER_TABLE option. i have two question here. When i was trying to restore/import the IBD file, the engine expect ...
0
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2answers
992 views

query execution time in mysql

I have run the query in mysql which consists of approximately 33million records when i have executed the query select population1 < 200000 from city; it shows like this after execution ...
1
vote
1answer
724 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
votes
1answer
40 views

How to do Mysql migration from 5.0 (320bit windows) to 5.6 (64 bit windows)?

I want migrate My Mysql 5.0 windows 32 bit to Mysql 5.6 Windows 64 bit? Please suggest me the best way to do migration, i have around 10gb of data present in Mysql 5.0.
0
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0answers
54 views

Text comparison select query needed that finds most whole word matches within larger string

I have a database of products, many with similar names. For example... iPhone 5s (GSM model) A1533 iPhone 5s (GSM model China) A1518 iPhone 5s (GSM model China) A1530 iPhone 5c (GSM model) ...
3
votes
2answers
86 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 ...
5
votes
3answers
3k views

Why query_cache_type is disabled by default start from MySQL 5.6?

We've upgraded to MySQL 5.6 and start seeing the loading of db server increased significantly, and finally found out the query_cache_type is defaulted to off start from 5.6. We enabled it again and ...
0
votes
2answers
3k 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.. ...
0
votes
1answer
28 views

Omitting [INTO] in the INSERT … SELECT statement

Does the INTO keyword only makes the query more readable, or does it bring another benefits as well? The queries beneath both seem to run equivalently . insert ignore tbl (type, details) values ('1', ...
0
votes
0answers
225 views

Unable to install mysql 5.6.17and configure mysql on Win 7 -64 bit Os

Already seen this post but not my type of question as iam stuck in the installation itself I am trying to install MySQL 5.6.17 on Windows 7 64-bit Operating System. Everytime I try I am stuck in ...
-1
votes
1answer
63 views

Remove all duplicate data in mysql

I want remove all duplicate data from my table. anyone help me. my table : biblio one one two three three four five i want to get result like this biblio two four five
0
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2answers
344 views

MySQL Community Edition Capacity

I am using MySQL Community Edition on Amazon RDS service. It is a very large database, 2/3 tables has about 10 millions records and 4-5 tables has 7-8 millions records. Questions How much capacity ...
0
votes
1answer
114 views

How to include a semicolon (“;”) in a MySQL pager command

I've just discovered the pager command in the MySQL command-line client, and I'm having a tonne of fun. This blog post is great: ...
1
vote
2answers
101 views

Keywords - column or separate table

I am building a website on MySQL with php, and I have 400+ products in a table. I have three columns with comma separated values, each has 1-3 values separated by commas in each row. I was wondering ...
0
votes
1answer
73 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 = ...
1
vote
2answers
686 views

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
194 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
3k 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 ...