Questions tagged [mysql]

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

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90
votes
6answers
120k views

Using wpdb to connect to a separate database

I want to connect wpdb to another database. How do I create the instance and pass it the database name/username/password? Thanks
52
votes
5answers
59k views

MySQL Database User: Which Privileges are needed?

The short installation instruction for WordPress ("5 Minutes") state that: Create a database for WordPress on your web server, as well as a MySQL user who has all privileges for accessing and ...
47
votes
5answers
34k views

Why is my database import losing text widget data?

I've created a site in WordPress on our development machine. In the theme we're using there are numerous widget zones to display text in (sidebar and front page). I've used simple Text widgets in all ...
20
votes
5answers
25k views

the_date() not working

I am using wordpress 3.2 and I did a query post like this: <?php query_posts("posts_per_page=1post=type&page=post_parent=10");?> Then I try to echo out the date of this post I queried like ...
4
votes
1answer
2k views

Extending search query with additional $sentence value

Next in my quest to extend WordPress is altering how WordPress uses the the $sentence variable in posts_search to include an additional string, when the $sentence variable meets a certain criteria. ...
0
votes
3answers
28k views

#1115 - Unknown character set: 'utf8mb4'

When I Import Mysql from local server to web ser it is showng me error 1115 - Unknown character set: 'utf8mb4' in Creating wordpress wp_comment table CREATE TABLE IF NOT EXISTS `wp_commentmeta` ( /...
35
votes
3answers
39k views

How do you properly prepare a %LIKE% SQL statement?

I'd like to use a LIKE %text% statement while still using the WordPress $wpdb class to sanitize and prepare input. SELECT column_1 from `prefix_my_table` WHERE column_2 LIKE '%something%'; I've ...
5
votes
5answers
16k views

Wordpress Database lost auto increment

After rolling back a Wordpress database to a backup version it seems that all the tables lost their auto_increment on the primary key columns. I read on another post this could be to do with InnoDB ...
3
votes
4answers
14k views

How to validate WordPress generated password in DB using PHP?

I am working with site that is done with WordPress, and I need to add some parts that are outside WP, and to check user login, Logging users outside WP. I tried with md5 of password but it's not... ...
1
vote
2answers
735 views

wpdb Custom Meta Data with 2 conditions

This is one of those problems that I've spent way too much time on, and there is probably a VERY simple solution that I am missing. Any help would be greatly appreciated. I am trying to populate a ...
7
votes
2answers
5k views

How to prevent execution of default query, while preserving ability to use WP_Query in template?

PROBLEM: I'am trying to prevent execution of default WordPress query for custom category template. I have found a possible solution, but looks like it preventing execution of all post queries: ...
6
votes
2answers
10k views

Get Previous & Next posts by Post ID

How can I go about getting the previous and next posts from outside the loop? Everything I try to do aside from the custom SELECT query (using get_posts or WP_Query) breaks stuff further down the page....
1
vote
0answers
1k views

SQL query equivalent to WP User Query

I have the following WP user query code: //Get all users sorted by whatever $sorted_users = new WP_User_Query(array( 'orderby' => 'meta_value', 'meta_key' => 'satisfaction_rating', '...
2
votes
1answer
4k views

tag search using WP_Query

I need to find only posts with a tag forest gump. I've tried: new WP_Query('tag=forest+gump');, new WP_Query('tag=forest gump');. However they both return ALL the posts and not only the posts with ...
1
vote
1answer
1k views

How to count post meta key values for all posts in database

In my post meta data I have the following 'key' for every post: "image_details" a typical value of which is an array such as: a:3:{s:23:"info_window_bg_image_id";s:3:"128";s:12:"colour_start";s:7:"#...
0
votes
1answer
2k views

Updating User Meta with SQL Query

I have a Wordpress site that needed to have 9,000+ users imported to set up a Directory Listing. I imported them from an existing MySQL (non-wordpress) database and everything imported just fine. ...
0
votes
2answers
173 views

AJAX Implementation

Am try to implement data from database using AJAX based on a drop down list in WordPress. The codes returning 400 bad request in the console. I am hosted the page as localhost. Here is my theme's ...
0
votes
1answer
258 views

simple wordpress ajax plugin not working when not logged in

anyone encountered this bug that it will work when you are logged in but once you log out it won't work anymore. this is a very simple plugin that will fetch zip code and display the corresponding ...
-1
votes
1answer
154 views

Stop all SQL_CALC_FOUND_ROWS wordpress queries

In phpmyadmin I often see this query that hangs with a status of "sending data": SELECT SQL_CALC_FOUND_ROWS wp2a_posts.ID FROM wp2a_posts WHERE 1=1 AND wp2a_posts.post_author IN (1) AND ...
20
votes
7answers
132k views

What SQL Query to do a simple find and replace

Whenever I create a new website I first create a staging site on a subdomain like "stage.domain-name.com". After everything works correctly I export the database, open it in notepad++ and do a find/...
28
votes
3answers
30k views

Should I use wpdb prepare?

I'm new to SQL and am wondering if I need to use wpdb->prepare for the following query to a table I've created global $wpdb; $tablename = $wpdb->prefix . "my_custom_table"; $sql = "SELECT * ...
2
votes
4answers
19k views

Convert WordPress posts to products in WooCommerce

Is there anyway I could convert all the posts e have right now on our WordPress install into products using some MySQL query or something like that?
13
votes
6answers
47k views

Will it break my site if I delete all transient records in wp_options table?

My site currently has an outrageous 500k+ transient records in the wp_options table. This causes the table to be crashed frequently and so be my site. I thought transient records will all expired ...
11
votes
9answers
23k views

How to replace the domain name in a Wordpress database?

I have a Wordpress database which was installed in a development environment... thus, all references to the site itself have a fixed IP address (say 192.168.16.2). Now, I have to migrate that database ...
9
votes
1answer
3k views

dbDelta support for FOREIGN KEY

On PHP 5.3.13/MySQL 5.5.21 the following code doesn't work: if($check_custom_fields_form!=1){ $sql = "CREATE TABLE IF NOT EXISTS ". $table_custom_fields_form ." ( `form_name` ...
7
votes
2answers
2k views

Can i use php sql functions instead of $wpdb?

I'm new to WordPress and was wondering why in WordPress API do they tell you to use functions such as prepare(), insert(), get_col(), get_row(), query(), etc. when technically I can use the built-in ...
5
votes
1answer
2k views

How does Wordpress handle MySQL row lock errors?

If there is a WordPress plugin which updates rows in a custom table, but that update encounters a row lock, what happens? E.g. two users simultaneously fire an update on TABLE1, one setting AGE=1 and ...
4
votes
1answer
2k views

Creating 20,000 Posts or Pages using a .csv file?

Here's my challenge: I have a .csv file which contains 20,000 rows of data. Each row contains 5 columns of data on an particular individual. I need each row (each person) to be populated into a ...
2
votes
1answer
4k views

How can I debug my database connection for unit testing?

I've set up a wordpress environment on my Mac with MAMP and I'm running 3.5.1 locally (i.e. http://localhost:8888/blog works). I'm trying to run the unit test suit from wordpress.org and having ...
8
votes
3answers
4k views

Complex meta query with 3 keys

I think the problem essentially relates to sql query structure and I am not an expert.... I need to search for posts (custom post type) by 2 parameters: pd_city pd_country Please note that ...
6
votes
2answers
507 views

WordPress database scalability from the code perspective

I have read through multiple questions here on StackExchange that concern WordPress scaling and the common opinion is that WordPress is indeed highly scalable provided you have the infrastructure to ...
4
votes
2answers
3k views

simple sql query on wp_postmeta very slow

I have a wordpress installation and I need this query on every post: select post_id, meta_key from wp_postmeta where meta_key = 'mykey' and meta_value = 'somevalue' I have 3M rows on that table, and ...
1
vote
3answers
1k 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 125,...
0
votes
2answers
6k views

Query to delete all featured images and remove post meta?

I'd like to run an SQL query to find all featured images from posts and delete the file itself and any references to it. Can anyone tell me how to accomplish this? Many thanks!
0
votes
5answers
17k views

Manually delete post from database

For whatever reason, I have a post and a page with the same slug name and it causes the db to hang. I can't alter the slug on either so I need to go manually delete the posts from the database and ...
7
votes
2answers
4k views

Return only Count from a wp_query request?

Is it possible with the standard build-in tools in Wordpress to get wp_query to only return the count of an query? Right now, I’ve a query which has several meta_queries but what the only thing I’m ...
5
votes
2answers
925 views

Ordering posts by day (not time) AND meta value

I would like to have a list of posts that is first ordered by day, and then within that day ordered user votes (stored as a meta field). Would it be better to convert each timestamp to the day at ...
5
votes
1answer
2k views

$wpdb and MySQL Create Trigger

Do $wpdb's methods not accept a MySQL CREATE TRIGGER query? I tried it with $wpdb->query( $sql_trigger ) over and over again without success. Throwing the create-trigger-query on phpMyAdmin the ...
4
votes
2answers
4k views

Searching users with WP_List_Table plugin

I am trying to devlope a plugin that will search and return my users so I can edit some other metatdata that belongs to them. I have been using the plug-in listed on the Codex as my starting point. I ...
3
votes
1answer
3k views

Split WP install between 2 databases?

Is it possible for Wordpress to work from two databases? The reason I ask is that we're approaching our 100mb limit for database size on our host (1and1) but have up to 100 databases, so what I was ...
2
votes
3answers
631 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 [zdvideo]url-of-youtube-...
2
votes
1answer
755 views

Does WordPress cache get_user_meta() results?

If I call get_user_meta() to retrieve a value, does WordPress cache the value? If I call get_user_meta() to retrieve the same value, does WordPress have to query the database again or is it stored in ...
1
vote
4answers
9k views

query to create woocommerce products from images

I have hundreds of art images in my WP media library, each of which I want to convert into a woocommerce product, and set as featured image of that product. Rather than manually adding new products ...
0
votes
1answer
6k views

Jquery ajax to custom php file: returning blank data

I created a custom php file, put it in my folder. The files does insert some data to the database to a custom table i created. require wp_path() . "/wp-load.php"; global $wpdb; $favorite_table = $...
0
votes
1answer
148 views

Update some database fields when post is saved

I have a class that will count the Lines of Code, Source Lines of Code, and the Code disk space used. I would like to save these values into the database so that these values can be calculated only ...
0
votes
1answer
81 views

Extending the database

I'm trying to add an extra column to the comments database which will store the user ID of the post/page author. This is part of a plugin which will display new comments in reply to either a post or ...
0
votes
2answers
5k views

Group posts by meta_key

I have a Problem with grouping meta_values. The Query looks for posts with the meta key "company". I want a unique listing of the colors like: blue red yellow array_unique was not successful and also ...
0
votes
1answer
242 views

Is altering a default WordPress database table update safe?

I want to add some table columns to the wp_terms table. Is it safe to use the dbDelta function with a modified CREATE-MySQL query for this? Or will I run into problems in the long turn? Is it update ...
4
votes
1answer
495 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 ...
3
votes
5answers
3k 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 ...