MySQL : Open-Source, Relational Database Management System

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2
votes
1answer
80 views

How to select from 3 tables while using count on 1, and sum on another?

I'm stuck on this one query. Here is my setup: table 1 (shows) show_user show_count table 2 (views) view_user view_views table 3 (users) user user_name What I need to is produce results ...
1
vote
1answer
677 views

MySQL DB structure with Main category and several nested sub categories

I am looking to create a set of fields on my webpage identical to what eBay uses on their category selection page when you are selling something. For my purposes I am doing motorcycles, power sports, ...
2
votes
1answer
103 views

Remove duplicate records from table, leaving one copy

I have inherited a MySQL table from one of my colleagues, and am in need of a little advice. The table has the following structure: | PHONE_NO | ACC_NO | GET_MAIL | DATETIME_CRE | INT_ACC ...
2
votes
2answers
172 views

Java Spring application Database triggers auditing - how to provide the right user that made the change

We are developing a new web application. one of the most basic requirement is to audit all entities changes into a separate table. We would like to use DB triggers for that purpose. We use MySQL as ...
3
votes
1answer
71 views

MySQL Join When Record in Joined Table Does Not Exist

How I can join two tables when record in joined table doesn't exist. I'm tried something like this: SELECT Confessions.ID, Confessions.WriteTitle, Confessions.WriteArea, ...
2
votes
1answer
16 views

Mysql Connector C++ statement values question

I just want to know, if a value, like an int for example, is actually converted into a string before being sent as part of the command. pstmt = con->prepareStatement("INSERT INTO test(id) VALUES ...
2
votes
3answers
104 views

“No database selected” or “Table 'DB.table' doesn't exist” failures in pt-upgrade run where queries from multiple DBs were collected with tcpdump

I collected queries on our Master using the following tcpdump command: tcpdump -i any -s 65535 -x -n -nn -q -tttt 'port 3306' > tcpdump.tcp The queries are executed amongst several databases. I ...
1
vote
0answers
27 views

Mysql Trigger use inserted value as column name for update After Insert

I have 2 tables: One for storing order_products and another one for keeping inventory levels for multiple stores The order_products table keeps the ID for the store in the store_id column. ...
0
votes
0answers
17 views

MySql stored procedures are not atomic (JDBC)?

I have a stored procedure with one UPDATE and one INSERT in its body. I call the SP with a single executeQuery(...) wrapped within a try-with-resources. The DB connection is set (by default) to ...
1
vote
1answer
35 views

MySQL v5.1.73 - can the binlog_format betweem Master & slave be different?

We are in the process of testing MySQL replication before using it in production. The MySQL is being setup by Puppet in our case and I noticed that the binlog_format setting is different between ...
0
votes
2answers
28 views

EC2 and setting up MYSQL Replication

my database size is very big around 100gb and when I restore it takes 3 days to restore. I am using amazon ec2. My question is I want to setup a new slave to MYSQL master, can I take a snapshot of ...
0
votes
1answer
354 views

Change MAMP to use a lower Mysql 5.1 version

I need to have the same development environment for my PHP program. My clients test server is running on Mysql 5.1 while my local is using MAMP running Mysql 5.5. How do downgrade my mysql database ...
-2
votes
0answers
10 views

I want to move the listbox one to another listbox and update the particular listbox value [migrated]

Here, Below i used the code. I am new in VBA. I am trying to move the one list box to another listbox, but I am not able to update the database table. I am struggle on few days. Why this error came ...
0
votes
1answer
229 views

SSIS Dataflow Task issue, moving data from SQL Server 2008 to MySQL via ADO.Net

Can you please help me in getting this problem solved.. I'm trying to build a SSIS package where I'm moving the data from SQL Server 2008 to MySQL. However I'm getting a weird problem in dataflow ...
0
votes
1answer
22 views

What does “Latest Restore Time” says in AWS RDS(Mysql) instances page

I have two RDS MySQL instances and when I look at the instances page, I have seen a field named "Latest Restore Time" and the value for it is some time stamp in IST time zone. I would like to know ...
0
votes
0answers
437 views

Oracle Flashback Archive aka Total Recall in MySQL [closed]

What would you suggest as a replacement system to achieve the same functionality of Oracle Flashback Archive aka Total Recall in other DBMS, in general or specifically in MySQL or MariaDB? ...
0
votes
1answer
242 views

MySQL crashing randomly

We have a sever running a website Joomla 2.5. We are facing frequent mysql crashes that occur when website has medium visitor load like a few thousands. It appears that mysql consumes more memory and ...
16
votes
7answers
43k views

Need to migrate SQL Server to MySQL

I have a database on SQL Server 2008 on a Windows server and I want to move all of the data to a MySQL database on a Ubuntu server. I have tried using the SQL Server Import and Export Wizard with the ...
0
votes
0answers
33 views

How to retrive deletes Mysql table data back?

I accidently delete data from mysql but i want it back. I am fedora operating system is use for installing Mysql. Please help ASAP because data is very critical
0
votes
2answers
58 views

Is it redundant to set your primary key as a unique key?

I'm putting tables together in MySQL workbench and I'm currently ticking my primary keys to also be uniquely indexed. Is this a redundant configuration?
0
votes
0answers
44 views

MySQL - high CPU usage (MyISAm tables) in LAMP

I have a LMAP stack running on Centos 6.6. Here is the detail which may help. # cat /etc/redhat-release CentOS release 6.6 (Final) MySql version # rpm -qa | grep -i mysql ...
-1
votes
0answers
20 views

problem in creating slave in localhost xampp [closed]

I have already created master on another machine and now I am creating the slave. I have added these lines in my.ini: binlog_do_db = new_db server-id = 2 # # The replication master for this ...
0
votes
0answers
43 views

How can i add index in MYSQL stored procedure?

I can not use alter table () on my stored procedure i don't have a permission to do that in the big database data_pro. How can i use index in my stored procedure for my 2 fields in where condition? ...
1
vote
1answer
126 views

Why is my stored procedure very much slower than the same MYSQL query?

My stored procedure is very slow compared to a normal query or a temporary table. How can I optimize my stored procedure? CREATE DEFINER=`datasll`@`...` PROCEDURE `product`() BEGIN EXPLAIN ...
0
votes
1answer
245 views

MySQL Entity Relationship Problem - 3-way join table?

This is a db relationship question. I have a scenario which I believe I have come up with a solution - however, I can't be sure it's a manageable one, or even correct. The scenario is as follows: ...
0
votes
1answer
1k views

Why does max_connections in my.ini not match concurrent connections in Mysql instance config wizard?

MySQL 5.1.x | Windows Server 2003 Can someone please clarify why max_connections in my.ini is much larger than the manual value I specify in the Concurrent Connections Dialogue? For example, if I ...
1
vote
1answer
60 views

How to select max value faster from large size table

I have query SELECT max(ParameterID) FROM modelparam_ems Table Name: modelparam_ems No Of Rows: 9000 It takes time to retrieve max value of parameterId, ParameterId in Unique value. Output Time ...
1
vote
1answer
631 views

mysql replication - missing table for foreign key on slave

i have the following situation: We're running a simple master slave replication with table filters, so the slaves doesn't have all the master tables. Master has table A with FK to table B Slave has ...
1
vote
2answers
450 views

MongoDB/MySQL - auto increment vs object ID

I am in the process of evaluating MongoDB and writing some basic PHP applications around it. Typically in my PHP/MySQL applications, I would create an ID field and set it to auto-increment on each row ...
1
vote
2answers
526 views

Check for table corruption

I monitor MySQL databases by querying various things remotely. I recently came across an issue where by a table had become corrupted but I did not know about it until the daily mysqldump failed. Is ...
2
votes
2answers
208 views

Is there a best practice for recurring calendar events

I'm not a dba but a php programmer, so that I'm not an SQL pro. Now, I have searched in both programmers and dba stackexchange sites but the answers are too specific or not conclusive. My question is ...
4
votes
5answers
799 views

MySQL runs out of memory when importing innodb database

I have a small VPS with 512MB RAM and no swap (can't have any). I am importing a 1.5GB innodb database with mysql -u -p < database.sql Before the operation can finish it says : Lost connection ...
0
votes
1answer
176 views

Speeding up a simple select query on Mariadb

I have a 100k rows table with the following structure: +----------+------------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | ...
0
votes
0answers
35 views

Design database schema for membership application with fees and purchases

My membership application needs to record payment of membership fee, card fee and misc. fee for each member. I also need to record purchases of each members and payments for the purchases.
1
vote
1answer
149 views

MySQL: Merge Same Database on Several Location into Single Location

I have registration form, which exactly same for several location. Each of them has REG column, which this field is unique for each row. Basically each data input have different REG number for it, ...
1
vote
2answers
269 views

mysqldump with automatically generated export name

When I do database dumps through MySQL WorkBench it picks a filename for me which is the current date (YYYMMDD). Now, I want to do this in a batch file since I want to make weekly dumps automatically ...
2
votes
3answers
393 views

Restore large MySQL dump thorugh EasyPHP

I am trying to upload large files on easyphp but as there is limitation on this software and large databases cannot be uploaded. Is there some other software that allows to import large databases? ...
2
votes
2answers
445 views

MySQL 5.1 High Cpu usage on CentOS 6

I am running MySQL 5.1 on a CentOS 6 server with 16G ram. I got also apache on it. MySQL is constantly using too much cpu. top - 17:40:36 up 112 days, 12:13, 1 user, load average: 1.24, 1.72, 1.82 ...
6
votes
1answer
1k views

Designing a database for a site that stores content from multiple services?

I'm building a site that implements David Allen's Getting Things Done that pulls in your email, Facebook newsfeed, tweets from those you follow on Twitter, and more services are planned. The problem ...
2
votes
1answer
19 views

Starting MySQL with SSL option using systemd

Can someone explain how to start a MySQL server with SSL options enabled using systemd? I've generated certificates and edited the my.cnf file to enable SSL but I'm not sure how to restart MySQL so ...
0
votes
1answer
182 views

How can I optimize this Cross Table COUNT() mysql query?

I am trying to cut down the retrieval speed of this MySQL query. All instances of COUNT() point to the PRIMARY key of each field. Currently this query makes my MySQL hang. It seems ridiculous as I'm ...
2
votes
1answer
69 views

Have foreign key constraint and index key for the same column(s)

I am creating a composite index key for 2 columns and then adding foreign keys to its appropriate table. Do I need to create a multiple index key reference and then create separate foreign keys? My ...
0
votes
1answer
165 views

How to pass the input parameters to dynamic Pivot stored procedure

This is my query: DELIMITER $$ DROP PROCEDURE IF EXISTS `leavemanagement`.`SP_ViewAttendance` $$ CREATE PROCEDURE `leavemanagement`.`SP_ViewAttendance` ( IN in_branch_id varchar(10) ) BEGIN ...
2
votes
1answer
47 views

innodb , mysql Indexes difference when adding index

When I am altering one of my MySQL table to add an index I am getting below error in error log. Table a/b contains 4 indexes inside InnoDB, which is different from the number of indexes 3 defined ...
0
votes
1answer
35 views

Mysql - unknown variable 'table_cache=64'

I use Mamp Pro 3. I upgraded Mamp's MySql to 5.6.24 using this script https://gist.github.com/tobi-pb/b9426db51f262d88515c. After that I ran the Mamp Pro and MySql cannot be started. So I looked the ...
1
vote
2answers
770 views

Trying to recover/import/transfer database from MySQL data dir

I used phpMyAdmin->export to create a backup of my database but I have now discovered it did not export the whole database, some tables was missed/refused. However at the time of doing the export I ...
0
votes
1answer
44 views

Non-Replicating commands from (master) Mysql 5.5.40 to (slave) MariaDB 10.0.19

CRUD replicates just fine. But we noticed that DB structure altering commands such as ALTER TABLE and/or adding/updating columns to a table and even creating new ones do not replicate to the slave at ...
0
votes
1answer
48 views

MySQL: “CREATE DATABASE mydb” command hangs [closed]

On my MySQL 5.6 server, when logged in as root, the command CREATE DATABASE hangs. No error message - nothing. The MySQL error log doesn't show anything special either. What could I look into to ...
0
votes
1answer
141 views

How to convert database mysql4 to mysql5

I have mysql dump file named booster.dump. It was export from 4.0.27-standard mysql server. Now I want to convert this database to mysql 5.1.73-cll. How can I do it? I search about this topic in ...
0
votes
1answer
225 views

Quickly establishing if a remote MySQL connection is valid using PHP

I have a hosted website (Namecheap Pro shared hosting) that connects to a remote MySQL database using a read-only user privilege. This remote DB is updated by a separate system. The website works ...