MySQL is an open-source, relational database management system.

learn more… | top users | synonyms

2
votes
2answers
3k views

How to get a Google maps SQL->XML->map marker tutorial to work in WordPress

I have been trying to figure out what is wrong with my code for a couple days now, and I can't seem to crack it. I am trying to follow this tutorial I tried all three of the suggested methods to ...
2
votes
2answers
1k views

wpdb->prepare function remove single quote for %s in SQL statment

I am using the below wpdb->prepare function in a sql statement. I am passing in several variables some field names and some values. When I try to use the %s for the field name it puts single quotes ...
2
votes
1answer
3k views

Check if post of title already exists

I'm writing a plugin that takes an xml feed and posts it into WordPress using wp-cron Everything is working dandy, except it keeps adding the same posts over again. So, I'm working on a system to ...
2
votes
2answers
391 views

Grouping related postmeta data via SQL query

I am using someone else's WP plugin which stores lots of related data in wp_postmeta using an "artificial key". So effectively we hijack wp_postmeta to create a nested relational database. So one row ...
2
votes
1answer
51 views

can database and media folder be moved to a different drive?

I have to move my site from Drive C:\ to Drive E:\. Is there a better way to do this than uninstalling the following: Wordpress PHP MySQL Apache and re-installing on Drive E:\? For example, how ...
2
votes
1answer
54 views

What is the most secure way to set up the MySQL user in WPMU?

I am setting up Subdomain based MU on my domain.Everything is hosted by me running on one CentOS/Webmin VPS. Will I be better off setting the MySQL user's domain as localhost, 127.0.0.1 or with a ...
2
votes
1answer
913 views

Use ajax to update_post_meta

2 days ago I asked this then I tried to work on my code to be able to understand how ajax and php work and now I have a new issue that, probably would be easily solved. These are my codes: <?php ...
2
votes
1answer
291 views

Multipart/formatted MySQL query problem

I'm creating a plugin and I want to automate the creation of a MySQL Trigger on a table. The problem seems to be that $wpdb->query doesn't appear to accept either multipart statements and/or formatted ...
2
votes
1answer
889 views

How many 'wp_insert_post' calls can be performed in one shot, in a very long 'for' loop?

I'm working on a plugin which has bulk post inserts using a spreadsheet. This spreadsheet can have multiple thousand rows, each row corresponding to a post. I'm parsing this spreadsheet, looping over ...
2
votes
1answer
3k views

Importing users to Buddypress with custom fields

Here's the setup: The client uses a proprietary custom-coded PHP CMS and is wanting to move to WordPress with BuddyPress. The old, custom CMS has a roster functionality, which I'm using BuddyPress ...
2
votes
2answers
117 views

Update a Wordpress post or page takes 60+ seconds

Since updating to Wordpress 3.5 I've had my updates of pages and posts become excessively slow. I've been timing them and they take 40-80 seconds to update. I've spent the last 2 hours reading and ...
2
votes
2answers
394 views

wp_admin edit.php slow with lots of queries

I have about 4,000 posts. Currently when I click on All Posts (edit.php) it's taking about 10 seconds to load and I'm showing approximately 1000 queries! Most of them look like... SELECT t.*, tt.* ...
2
votes
0answers
258 views

How to let a user choose an authors and save it to the database?

I have a multi-author Wordpress site which reads different rss feeds and posts them to my page. I was wondering if it is possible to make a code that would provide an opportunity to registered user ...
2
votes
1answer
116 views

theme options echoing multiple times

I tried to strip down the Twenty Eleven theme options page and add my own fields correction: I followed a tutorial somewhere, but when I try to echo the data, it comes out multiple times. Here is my ...
2
votes
1answer
1k views

PHP/MySQL issues when running WP on EC2 cloud [closed]

I am trying to create a wordpress blog on an Amazon EC2 instance. The amazon base image had apache and php already installed. I installed MySQL manually in my user directory. I am able to login to the ...
1
vote
3answers
455 views

Insert all post IDs in new database table

I have a plugin which creates a new database table. Upon activating the plugin is there a way to insert all my posts ids into that table? Right now I'm using an action hook to immediately insert the ...
1
vote
3answers
497 views

Search and replace text across all posts

I had used the ZD Video Plugin for WP a long time, and now, since my move to WP 3.0.2, it doesn't work anymore. To embed a YouTube video using the plugin, I would just write ...
1
vote
1answer
915 views

Wordpress 3 - how are passwords stored and how do I compare to them?

For reasons I can't go into right now, I'm creating a form that will allow users to change their passwords for Wordpress by entering their current password and then entering the new password. I want ...
1
vote
3answers
99 views

Styling images coming from another blog

I had asked a question earlier, on getting post-thumbnails from another WP-site. There, the awesome Mike coded a SQL query whose results are then passes on to a PHP array. The piece of code from that ...
1
vote
2answers
5k views

WordPress mysqli and PDO

Does wordpress code base use mysqli or PDO? I know PDO is superior to mysqli but mysqli is not bad neither. Plus from one of the features of what makes PDO is superior to mysqli ( that is being ...
1
vote
1answer
1k views

Universal problem: first request after ~25 second inactivity always slower (~1 second) than subsequent requests (~1/10sec)

It's something I noticed ever since I started working with WordPress. It's a universal issue, in the sense that it doesn't matter if the WP installation is on my shared hosting account (haven't tried ...
1
vote
2answers
1k views

what to do when your WordPress database is too large?

Well I have asked this question in WP Forums, StackOverflow, and GoDaddy community as well, but nothing worked out. Hoping something is in here. I used 2 separated subdomains for my blog and site ...
1
vote
1answer
1k views

mysqli_real_connect() - authentication method unknown to the client Warnings

I keep getting the following warnings in my debug log: PHP Warning: mysqli_real_connect(): The server requested authentication method unknown to the client [mysql_old_password] in ...
1
vote
3answers
458 views

Delete post revisions on post publish

Is it possible to delete post/page revisions from the database when a post/page is published? 11/05/12 Answer: See the plugin below by bueltge I want to do this on a site with 5,000 posts and ...
1
vote
2answers
3k views

How to Query Database for posts with certain Taxonomy Term

I want to write a select query to return data on only posts which have are associated with the taxonomy term food-and-beverage SELECT wp_postmeta . * , wp_posts.post_name FROM wp_posts, wp_postmeta, ...
1
vote
2answers
10k views

Get Featured Image via direct sql query

I know you can use the wordpress methods for getting a featured image, however with this particular project I need to get the featured image via mysql query. Can anyone point me in the right ...
1
vote
2answers
2k views

How to remove duplicate Custom Fields?

I have migrated my blog from blogspot to WordPress. Then I have noticed many of the posts contain duplicate custom fields. Like blogger_author, blogger_permalink, blogger_blog are duplicated upto 5 ...
1
vote
2answers
849 views

How to create another version of my site based on the same database

I have created a site and would like to create another version of the same site using the same exact database (db location, users, everything). The two sites would share one database. I already have ...
1
vote
2answers
252 views

greatest() function returns undefined property

I'm using the mysql GREATEST() function to compare two table fields and display in a loop either one with the highest integer value. The 2 fields consist of vote scores for posts: UP or DOWN. ...
1
vote
2answers
202 views

Select Multiple meta_value from WP DB; Single Query

I am trying to retrieve each user's first and last name, phone, email, and address from the usermeta table. I'm having trouble selecting multiple meta_values, each with its own meta_key, using a ...
1
vote
1answer
992 views

Large database causes slow load

I have a 2GB WordPress database (using InnoDB Storage Engine) and I noticed my site loads slow when I press the publish button right after I selected a featured image in the media library. I had a ...
1
vote
1answer
1k views

the_author_meta not working

I'm trying to use the_author_meta to retrieve some links which users can set in their profile. I set up extra profile fields and they are saving to the database. On my author.php I have the ...
1
vote
2answers
660 views

Mysql query LIKE not working

I'm using this code. $blog_list = $wpdb->get_results( "SELECT " . $extra . "blog_id, last_updated FROM " . $wpdb->blogs. " WHERE public = '1' AND archived = '0' AND mature = '0' AND spam = '0' ...
1
vote
3answers
1k views

MySQL query to set wp_postmeta using term_taxonomy_id value

I have a need to set the wp_postmeta value (in table: wp_postmeta) on every post that has a specific term_taxonomy_id (in table: wp_term_relationships): Specifically: run a query against every ...
1
vote
1answer
509 views

Rewrite database urls

Is there a query I can run on my wordpress database so that I can change all instances of www.mydomain.com to localhost/mylocalsite.com?
1
vote
1answer
2k views

How can I SQL update a meta_value to remove the dollar signs that were entered with the value? (so just the value remains)

For all the "price" custom fields of a site, the dollar sign was entered with the value. I need to remove the dollar sign and leave the just the values. I know very little about SQL queries. The ...
1
vote
2answers
527 views

How can I add a user through SQL?

By mistake I just ran this query: (note the extra ;) DELETE FROM wp_users; WHERE ID = 321; How can I add a user through SQL? I searched around but couldn't find a proper answer to this fairly ...
1
vote
2answers
1k views

Different database query in function.php using mysqli

I am trying to connect to a database in the function.php using mysqli. The code seems to run fine when it is not on a separate php file not on wordpress. But when I run it on wordpress I get "Connect ...
1
vote
1answer
241 views

HTML Entities in Post Title

I'm inserting posts into wordpress using a script which is loaded through CRON. Before inserting each post I am checking whether the post with the same title exists or not. Below is the snippet I'm ...
1
vote
2answers
458 views

How to create and work with custom data / tables (i.e., for arbitrary data)?

Getting started on Wordpress just today. I noticed that Wordpress created tables in a mySql database (with name *.wrdp1) when I first set it up. These tables cover comments, posts, users, and some ...
1
vote
1answer
1k views

Within the database, where is the flag which says that a user has Super Admin rights?

I have an user in a Wordpress Multisite installation and have access to the Mysql database, I would like to give myself super-admin rights to access the wp-admin/network page. Where can I do it on ...
1
vote
1answer
666 views

Is it possible to split database tables using HyperDB?

I'm looking for an answer from someone who's implemented HyperDB or has knowledge of it. I have a database which has just passed the 100mb mark a week or so ago, the problem is my host only allows ...
1
vote
1answer
432 views

Disallow categories from this MySQL query

I'm trying to modify a plugin that generates an archive listing so it shows only one category, making it a single category archive. The old version of the plugin used a get_posts query, and so it was ...
1
vote
3answers
340 views

Performance on WPMS

my WPMS site is hosted on 8 cores/32mb RAM server but the response time is very high. We have about 1000 blogs (35,000+ tables on single db) and 70,000 pageviews per mounth. I think that i can down ...
1
vote
3answers
1k views

importing users where password is provided as md5 + much metadata

I have a spreadsheet that was provided to me of users to import to a new site I have built. I was provided with the password in MD5 hash form. I suspect if I insert this into the password field in ...
1
vote
1answer
2k views

query users by role

I have a custom plugin which queries users and usermeta, but I now need to filter admins out of the results. A very simplified version of my sql query is: SELECT * FROM usermeta LEFT JOIN users ON ...
1
vote
1answer
753 views

Adding new row to wp_post table

I want to add 2 more rows (for voting up or down) to my default wordpress posts table. Would those rows be deleted when I update my WP version, or cause any other problem? An alternative would be to ...
1
vote
2answers
40 views

How do i fix? WordPress database error: You have an error in your SQL syntax;

I am Using Wordpress for making a website and getting below Error only on my pages and No shortcodes are working due to this error. This error ONLY seen on PAGES they are working fine on POSTS. I ...
1
vote
1answer
44 views

Safe to delete blank postmeta?

We have a lot of rogue custom fields. I feel that we can clear significant space in the DB if we remove the blank values. If I query my database with the following: select * from wp_postmeta where ...
1
vote
1answer
29 views

Are database queries created using WordPress filters protected from SQL injection?

I'm using the WordPress 'posts_where' filter (https://codex.wordpress.org/Plugin_API/Filter_Reference/posts_where) to alter my queries as below: function filter_my_search($where=''){ ...