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0
votes
1answer
102 views

Delete duplicate with same ID PHP/PDO/MYSQL

I'm new to databases and I need your help I'm working on a website and I have few problems. I'm using PDO. There is a user table, with unique ID, name and password. User enters his username and ...
0
votes
0answers
34 views

which approach gives better performance ? using while or foreach in sql data [on hold]

I have a question regarding performance , our code fetch data from remote server and do calculation and generatete csv file and then zip all the csv ; it took too much time. can you throw some ...
0
votes
0answers
24 views

Fixing errors in sql statement [closed]

I have 3 tables of which i queried the first table (users) to get this result: $String_users= '19,20,21,22,25,26,27,28,29,30,31,32,33,34'; and I want to filter through two other tables friends and ...
-3
votes
0answers
43 views

we need to create a databse which keep track of student attendance [closed]

i need to have a database which allows teacher to login and select there receptive subject and mark attendance, and student can only view their attendance by entering their USN in the form of ...
0
votes
1answer
457 views

How to check mysql password change and other events logs

Recently someone change my phpmyadmin password and drop database I think it was sql injecting. Now I want to find information about this like when, how and who change my password Please tell me ...
0
votes
0answers
16 views

How do you retrieve a list from a database that may have the same entries and only display once [closed]

I am trying to find all the makes of vehicles I have in my database and list them all. Problem is some vehicles have the same make and I don't want it listed twice.
0
votes
0answers
11 views

Database design advice for user access to certain options

I'm creating simple management system where I have 4 types of user access i.e. different permissions. I have created table users where I store each user and each user has user_role column where I ...
0
votes
1answer
106 views

Error code 1064 when trying to add anything manually

So i tried adding via php and i noticed i got a error , so i went into phpmyadmin and tried adding it manually by clicking the SQL in phpmyadmin and write in INSERT INTO `test`(`IDtest`, ...
0
votes
2answers
389 views

How to select different format of the date in mysql

0 down vote favorite i have this table and i cant change its format to yyyy-mm-dd because i have so many scripts that are related to this format dd-mm-yyyy , it would be a mess if iam gonna change ...
0
votes
1answer
357 views

compare results between two select queries mysql

i'm making test application where users will input their select queries in input box and the application have to compare them if they are identical with "correct answer" query. "Correct answer" query ...
0
votes
1answer
279 views

How to use explode mysql function in where condition with cakephp

I am using cakephp 2.6. I have payment_method fields in mysql table which store the values like 54,52,59,57 . Now my question is that how can i check if new posted payment method id is available in ...
0
votes
2answers
41 views

Searching for a keyword across multiple columns

I have a set of names of schools stored in each row in my schools table. the same table has four different category columns which store the names of the subjects they offer. I want to enable ...
0
votes
2answers
49 views

Insert the same time, it is possible to happen?

Good evening. I have a doubt about inclusion in the database. A common example is a user account where the user names must be unique. In the following logic: User enters data into a form. Data are ...
1
vote
1answer
656 views

MySQL: SELECT GET_LOCK slow/timeout

I am using "Zebra Session" as a replacement for PHP's built-in session management. Zebra Session stores sessions in a MySQL database, and uses "session locking" in order to ensure that data is ...
0
votes
1answer
190 views

MySQL taking significantly longer to query via PHP than CLI

TL;DR: I have a query that takes under a second to run via MySQL's CLI, but over 12 minutes via PHP and I'm at a total loss on what to check next. It's a fairly horrid query, full of joins, but the ...
0
votes
0answers
5 views

PDO does not fetch any results

I was using PDO queries directly in index.php file.Now I want to create separate file where I will store functions. I created one, but when I call function returns only "0". Old version works: ...
0
votes
1answer
358 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 ...
0
votes
1answer
220 views

Can I split mysql the search results into two tables in php?

I have index tables with multiple columns: s | s1 | s2 | s3 | s4 | s5 | s6 | s7 | s8 | s9 | s10 | s11 | s12 | ------------------------------------------------------------------- 0 | 1 | 0 | 1 | 1 ...
1
vote
1answer
227 views

PHP / MYSQL connection failures via socket under moderate load

I've done quite a bit of reading before asking this, so let me preface by saying I am not running out of connections, or memory, or cpu, and from what I can tell, I am not running out of file ...
0
votes
1answer
28 views

SUM 2 columns with 2 columns same name [closed]

I have this table id, teama, teamb, pointa, pointb. Columns teama and teamb containing the same names. I want to output the sum grouped by teama from teama where pointa and where teamb pointb. for ...
2
votes
2answers
283 views

MYSQL joining 3 tables with left join

I have these tables: pupils: (id_pupil, name, surname, email, user, pass, level, class) incidents: (id_incidents, date, time, type_incident, comments, id_pupil, id_user, subject, id_trimester) ...
0
votes
3answers
103 views

How do I echo data from two tables that are associated to one user in php

Say I have tbl_company with these cid------- cons_no-------- company_name ------- phone ------ address 1---------- q1----------------aple------------------------22222-------newyork 2 ...
1
vote
1answer
37 views

Multiple increments in table

Let's say I have a table which stores different bills. There are multiple departments using this database and every department needs to use their own incremental numbering for the bills. I do ...
1
vote
1answer
186 views

Challenging MySQL query, compare two records to find if they match or not

I have a large (88K rows) table that holds data in pairs. For a specific entity, there are 2 records, with UID's and then a load of additional data. I need to take each pair (pairs can be found by ...
0
votes
2answers
1k views

No connection could be made because the target machine actively refused it

I have created a PHP site using MySQL. It works well on localhost. However, when I moved it to a remote server, it stopped working. The error shown is: "No connection could be made because the ...
0
votes
0answers
13 views

PHP+MySQL error HY000/2002: buffer memory insufficient or query queue full

I'm developing a small project in PHP(mysqli)+MySQL using only prepared statements. I've got a table related to 4 other tables in 1...n cardinality. I wrote a script with a simple for loop from 1 to ...
1
vote
1answer
167 views

How to update a whole document in MongoDB using PHP?

I want to update my older entries through the PHP interface in MongoDB. First, I get data from the text fields and then store that into variables. Then I use those variables to update data in Mongodb. ...
0
votes
2answers
127 views

SQL Query Help to get Quiz statistics

I'm coding a quiz web application and i need help. I've got three tables Nicknames : |USER_ID|NICKNAME| that stores USER_ID(auto increment) and NICKNAME registered to my system. Questions : ...
0
votes
0answers
8 views

Display dynamic table of checkbox in 3 columns in php [migrated]

I have a database table of subjects. I have a web page that displays the list of subjects in 3 columns so that a user can select subjects using a checkbox. The challenge I have is it takes a long time ...
0
votes
0answers
24 views

MySQL user variables vs repeated parameter literals. - performance

I am currently designing a large query which uses a number of parameters numerous times throughout the query and subqueries. After checking out some posts on multiple repeated params, I decided to ...
2
votes
1answer
16 views

Removing the uses of MySQL temporary tables

We have a very huge PHP/MySQL application with a lot of legacy code, this application utilized MySQL for most of it's work. It does most of the processing on the database side using temporary tables, ...
2
votes
1answer
9 views

Inserting Items Bought by the Customer into the database

I'm having a hard time conceptualizing on how to store the items purchased by the customer into the database while taking note of who was in charge(the cashier in charge of the customer's products) of ...
0
votes
1answer
205 views

Suitable schema to record email sent and response received and invoicing in DB

When a form submission is made on a website: An email with form's details is sent to a set of recipients email addresses stored in a DB. The email contains a link for the recipient to show interest. ...
1
vote
1answer
174 views

Best practice to create a database schema for Open Auth (Social logins)

I've done a database schema for user management alongs with their roles and permissions. The problem actually began, when I decide to integrate a multiple "Open Auths" such as Facebook Login, Google ...
0
votes
2answers
189 views

Best configuration for MySQL? InnoDB and MyISAM

I read that InnoDB is supposed to be better at writing into MySQL than MyISAM, however, I'm trying it out, by running 3000 MySQL queries(Inserting rows, 8 Columns + id)... but results haven't turned ...
1
vote
2answers
559 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
votes
1answer
26 views

Connected to mysql database but cannot print the data

I connected successfully to my database and the I tried to print my data but I can only see the "Connected succesfully" line in the browser. Here is my code: <?php ...
0
votes
1answer
31 views

Php, MySql - Optimisation

I asked this on the general site, but they suggested I come here for ultimate optimisation. It really boils down to which is faster; doing a load of calculations in php with database stuff that is ...
0
votes
0answers
43 views

MySQL Too Many Connections (Max Connections Limit Not Reached)

Running a PHP 5.6 application that connects via MySQLi to a MySQL database (5.5) that intermittently errors with the "Too many connections error" however this seems to be a red herring to another ...
1
vote
0answers
30 views

use IFNULL in laravel

I have a query in laravel which is working fine. $subjects = $app->db->table('subjects')->LeftJoin('downloads', 'subjects.subjectID', '=', 'downloads.subject_id') ...
-1
votes
1answer
15 views

How to sort student result based on subjects

I have this mysql table How can i sort this MYSQL table to this output:
0
votes
1answer
29 views

How to find the most common phrases in a MySQL database

I have a table which contains articles on movies. Each article has a title and many of them have common phrases in them. I would like to do some analysis on the data and extract these common phrases ...
0
votes
2answers
77 views

mysql too many connections in linux/nginx/php-fpm/php server

One of my mysql client reports "too many connections" of the mysql server. With the processlist of the mysql server, I find many connections come from a client with LNMP(linux nginx mysql php). The ...
1
vote
1answer
9k views

how to sync local mysql database and live server database?

My plan is to store data in my local MySQL database and after a time interval it will update my live MySQL database remotely. Is it possible? I'm planing a inventory management script in PHP MySQL. ...
1
vote
1answer
47 views

Best way to create searchable and sortable product database

I'm pretty good with coding but I'm a noob at database design. This is a common problem but I didn't see an exact answer so I just want to confirm before I start coding everything. I have a shopping ...
0
votes
1answer
32 views

want to import exported xml file in wamp phpmyadmin

I have exported single table from wamp phpmyadmin as xml file for data verification and want to import it again into database as mysql table. Please give me guidance, how its possible?
1
vote
2answers
33 views

How to determine if a column already exists in a MySQL table before altering the table to add it?

I am trying to determine if a column already exists in a MySQL table before altering the table to add it. I need an all in one query I can run since I am executing this through an old PHP mysql ...
0
votes
1answer
61 views

Combining 2 SELECT queries and printing the results in PostgreSQL

I have 2 queries which I want to use together to produce one output result to the user. The output describes to the user the journey to take to from A to B. I keep getting a syntax error when I try to ...
1
vote
1answer
27 views

lat, long based search with $near shutdown my mongodb on Linux server

Hey guys i am stuck on critical problem & unable to resolve it. I have a project where there is a collection of UK postcodes having 18,00,000 sample postcode records. I have a search query where i ...
3
votes
0answers
75 views

Is this user-storage database system efficient, effective and secure?

I am using: PHP Version 5.2.17-MIT-BACKPORT-GnuTLS SQLite 2.8.17 I have a database called users, which currently has a table called root. There will be others, once I get all the rows for root ...