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1answer
74 views

Reviewing relational database tables

I am building a database, but I am a little bit confused with my table relationships. I wish someone could help review my table relationships below for me and tell me where I am going wrong. I have ...
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0answers
20 views

Checking for records in lookup table before deleting

In my MySQL database, I have products table, a locations table and a lookup table (called location_products) where the ID of the product and ID of the location are stored. I am creating a transaction ...
0
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0answers
22 views

Generate report from visitor counter

I have a visitor counter, the table looks like this: id | country_code | datetime | Browser | ... --------------------------------------------------------- 1 | FR | ...
0
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0answers
47 views

Low performance oci_execute

I work with a PHP application that connects to an Oracle database. Sometimes, the PHP executes a large query from a large database the page loads for ages (more than 200s). But I've seen something ...
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1answer
61 views

Implementing Permissions Database structure on a PHP site to restrict the Access in Multiple levels

I am working on a PHP site that shows the business of a Vehicle Showroom company in which we have 3 users as, Admin(Owner) = Here Admin Have all Access by default(View,Edit,Delete to all) Super ...
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0answers
31 views

Upgrading MySql 5.1 to MySql 5.5

I followed a tutorial to update My MySql 5.1 to 5.5 (actually i wanted to upgrade to 5.6, but the tutorial mentioned that i should upgrade to 5.5 first and then to 5.6). However, after removing ...
1
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1answer
70 views

Concurrency Issues when multiple users uses Portal (MySQL and PHP)

We have set up a portal using Yii Framework in Apache, PHP and MySQL. In the portal, there is a feature to export the data in dbf format, the extract takes around 7 minutes, but in those 7 minutes no ...
1
vote
2answers
48 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 ...
1
vote
1answer
2k views

Aborted connection (Got an error reading communication packets) MySQL on Amazon RDS

I'm getting the following warning in MySQL: Aborted connection (Got an error reading communication packets) I'm using Amazon RDS for MySQL hosting. Both MyISAM and InnoDB storage engines are ...
2
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1answer
48 views

Peer review database design for various reports

I'm currently trying to redesign a poorly thought out database for a peer review system that we use internally at my workplace. Employees can log on and submit a review about another employee who ...
0
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1answer
150 views

desing the database for survey app with various types of answers

I have to create a survey app for which answers should be stored in the database. I created an html form containing some questions (about 30) with various types of answers (check boxes, radio buttons, ...
0
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2answers
69 views

JOIN on three tables is not working

I have these three tables, user, categories and files In users, table I have a column user_id And I have this query that shows all Categories. SELECT `categories`.`category_id`, ...
1
vote
3answers
98 views

Mysql to Oracle communication

I have a website running with php and mysql on Centos(Amazon instance). The newly brought ERP(to be integrated with existing system) uses Oracle as db(located on a separate Windows Server). The orders ...
0
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0answers
16 views

Database design and Technology [closed]

Can someone point me in the right direction for this scenario as I am designing a website: Its a portal where people can save customer details in the cloud. Now i want my main website to allow them ...
0
votes
0answers
524 views

how to append or update JSON datatype value in postgreSQL

hey guys i'm using PHP's codeigniter to create my application and postgreSQL as database and i have to update some value in database. So, let's say we have table structure like this:- CREATE TABLE ...
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0answers
24 views

Intermittent Connection Speeds SQL Server 2008

We are having issues with a PHP-based application connecting to an SQL Server database on a separate server. It uses a single PHP page to establish the connection using mssql_connect, and this page ...
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votes
4answers
2k views

Host is not allowed to connect to MySQL

I have already uploaded some files in the free web host I chose and created a database there using phpMyAdmin v2.11.4 Also, I have Googled first this question before posting this here but I don't ...
1
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0answers
35 views

Host is not allowed to connect to MySQL [duplicate]

First of all I'm acknowledging you that I am a completely newbie in this field. The field I'm referring to is the summation of these things: Accessing files on different computers or over the ...
0
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0answers
88 views

Connection occasionally fails connecting to MySQL on Amazon RDS from PHP

We're moving MySQL databases from our own EC2 instance, to a multi-zone RDS instance. These are accessed from a load balanced lighttpd + PHP cluster. We've noticed that quite often, in the morning, ...
1
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2answers
86 views

JOIN on variable number of columns

I have the two tables courses AND something_about_courses: courses course_code course_session course_type something_about_courses course_code course_session some_description To ensure that I ...
0
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0answers
186 views

Mysql Insert taking too long. Table need optimzation

I have around 60 tables and a video table with over 600,000 rows. with 4 Btree and 2 FULLText Indexes and have around 30 Columns. Server Specs are high, over 30G of Ram, Intel Xeon Processor. Mysql ...
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votes
0answers
59 views

Can this architecture supports 350 concurrent access? [closed]

This question is more about server capacity issue. I have a linux server with Apache 2.24 installed (12G Ram, 32 cores CPU, Red Hat 64Bit). Install 11 instances of Wordpress, all 3.8.1, with WP ...
0
votes
1answer
134 views

Update table from calculated temporary table

I have two tables, one containing a set of user ID's, vote direction (-1 or 1) and ID of the object they voted on (casted votes table). In the other table, the object id, upvotes, downvotes and ...
0
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0answers
128 views

How to use Select query just right after Insert on master in a query.?

I have a question on mysql replication. As usual, I deployed my db structure like the Update on master db, the select on slave. My questions. If I use SELECT query just right after INSERT in a query, ...
-1
votes
1answer
229 views

Insert a file into PostgreSQL BYTEA field using PHP

The previous answers have been horribly complex for the scope of this project. I want to take the $_POST result as a variable and insert it into a BYTEA field of a table. $_SESSION['username'] = ...
1
vote
1answer
26 views

Duplicate Data from two column

i have a table which has only two column one is pid(Photo ID) and another one is tid(Tag ID) +-------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | ...
0
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0answers
210 views

#2002 Cannot log in to the MySQL server / Connection for controluser as defined in your configuration failed

I use PHP/MySQL in Ubuntu 13. To reduce the size of ibdata1, i followed this post What is the best way to reduce the size of ibdata in mysql? and make necessary changes as told in the answer. I did ...
0
votes
2answers
85 views

MySQL - prevent OS cache for query

On high load production server I have many sql selects which are unique or re-use will be in hours. I use SQL_NO_CACHE but this queries are still cached with OS cache. Server have 64G ram and used ram ...
1
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1answer
28 views

Adding ID in second Table

I have two table one is photos and another one is photo_detail, this is how i have created both tables: /* creating photos table */ CREATE TABLE photos( -> pid INT(10) NOT NULL AUTO_INCREMENT, ...
1
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0answers
64 views

Script to query MongoDB with PHP [closed]

With Code Igniter and MySQL I do: $this->database->query('select * from table'); But I don't know how to use MongoDB. Can I still use this the same way to query MongoDB? ...
0
votes
0answers
35 views

mysql id sequencial problem

I create 3 records with the id 1,2,3 I delete record 3, then in the future add another record, it then goes 1,2,4. how to id get sequential order when it is deleted the record like 1,2,3
1
vote
2answers
112 views

MySQL 5.5 to 5.6 Upgrade. Will data remain the same?

We are considering to upgrade to MySQL 5.6 this summer. I would like to know if our data will be changed in any way once we perform the upgrade? I've been reading and I found that mysql_upgrade ...
2
votes
1answer
322 views

What is the difference between MySQL and PostgreSQL in terms of writing SQL queries? [closed]

Other than performance and security is there really any difference between MySQL and Postgres like SQL queries, built-in functions, procedures and so on? I'm asking this because I'm familiar with PHP ...
0
votes
1answer
16 views

Force number of entries

My title probably isn't the best, but essentially I have a table that stores a host, vulnerability finding reference, and status. I am trying to query on those, but where I don't have an entry I want ...
0
votes
2answers
405 views

is it possible to create a dynamic website without a database?(Only use a File to save Data)

I learn PHP from now. And for create a dynamic website usually use PHP + MYSQL(For database). In PHP have function like fopen() to create, write result from form to a file like txt or other. My ...
7
votes
1answer
368 views

Deleting large amounts (4 million rows) of mysql data efficiently, on a very regular basis

We have a mysql table that at any given time has about 12 million rows. We need to delete old data to keep the size of the table somewhat manageable. Right now we are running this query daily, at ...
1
vote
1answer
421 views

Lookup table naming convention? [closed]

Is there a naming convention for lookup tables? I cannot see any declaration by oracle or anything consistent on google. However I assume some of you professional DBAs follow a convention? Perhaps ...
-1
votes
1answer
140 views

Problem with intersection table

I seem to have came to a problem which I am having trouble solving, possibly because I have misunderstood intersections properly(or perhaps I shouldn't even use intersections for the goal). If we ...
1
vote
2answers
128 views

Questions since MySQL Startup

Have a weird question / (bug?) here. Using PHP My Admin I installed via apt-get on Ubuntu 13.10 Versions are as follows: Server version: 5.5.35-0ubuntu0.13.10.2 - (Ubuntu) Apache/2.4.6 (Ubuntu) ...
0
votes
1answer
55 views

Maximum normalization

I have been studying the normal forms rules to guide me with database design and data storage, the problem I am having is that once I optimize for the first normal form (1NF), I figured I may well ...
0
votes
2answers
172 views

MYSQL Master-Slave replication not working with PHP

My data gets replicated from the master database when I do it manually but when it gets inserted from PHP into the master database it doesn't get replicated to the slave database. My Master database ...
-1
votes
1answer
473 views

MySQL: how to copy a database from one server to another without export / import

I have access on two different Windows systems. There is one MySQL database on one system which I want to copy to another system. Please note that I haven't username and password for DB access on the ...
0
votes
1answer
42 views

Storage of final entry values in read only table

I have two identical tables, one is for rows which are in a queue, and one is where I move my rows once they have been processed.(thousands of rows processed daily) In my jobs table, I store ids to ...
1
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0answers
142 views

mysql database is corrupt after system power failure

I have mysql database using xampp in my widows system. its got currupt after power failure i have back of database before 2 days but i dont have backup of one day transactions. now i tried ...
0
votes
1answer
99 views

How to add CYCLE to BIGSERIAL in phpPgAdmin

I'm trying to apply CYCLE to a BIGSERIAL in phpPgAdmin. I've seen how to do it with a query, but I'd much rather be able to do it from phpPgAdmin. Can this be done with phpPgAdmin? If so, how? If ...
1
vote
2answers
147 views

Disk write in iotop when doing mysql “Copy to tmp table”

I have just moved servers from a two-server configuration with the application and database server running separately to a one-server LAMP stack. Unfortunately the issue that I have encountered on ...
1
vote
1answer
104 views

Join Query effects natural ordering [closed]

If we have 2 tables **user** +----+------+------+-----------+ | id | user | pass | gender_id | +----+------+------+-----------+ | 1 | lisa | good | 11 | | 2 | jack | pass | 10 | | 3 ...
0
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0answers
57 views

Filemaker to Firebird data exchange

I want to connect from filemaker to a firebird 2.x DB. Firebird ODBC is not supported, only MYSQL, MS SQL etc. Is there any way to have a translator in between or maybe to connect through a PHP ...
0
votes
1answer
130 views

Automobile database logic

I am building a web based quoting system for a local automobile dealership. I think I have figured out the logic for the databases but I want to get a second opinion before I start just to make sure ...
-1
votes
1answer
184 views

Error in upgrade_from_array - mysql: 1064 query: DROP TABLE IF EXISTS filling tables

Error in upgrade_from_array - mysql: 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 'myhandyrestaurant' ...