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

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How to get the total number of meta_values based on a custom post type?

I need to display the total number of votes that have been made for a specific custom post type. Here's an example of how the wp_postmeta table looks for these keys/values: meta_id post_id meta_key ...
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3answers
898 views

Order By Multiple Meta Fields

I have two custom fields: meta_key1 is boolean (0 or 1). meta_key2 is a date value - 20150623 for example. Not all meta_key2 fields have an explicit value. It looks like their being treated as an ...
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1answer
204 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 ...
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2answers
2k 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 ...
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1answer
777 views

MySQL LIKE not working

It seems MySQL's LIKE operator behaves like a = operator. The following MySQL query returns the expected result (1 entry): $meta_key = '_locality'; $meta_value = 'The Hague'; $post_ids = ...
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2answers
2k 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 ...
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1answer
322 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 ...
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2answers
512 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 ...
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2answers
3k views

Increment value (value = value+1) of $wpdb->update

This sql query $wpdb->query("UPDATE log SET total=total+1 WHERE id='1')"); How do I turn it into $wpdb->update() statement? Ex. $wpdb->update('log', array('total'=>'total+1'), ...
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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 ...
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1answer
744 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 ...
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1answer
449 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 ...
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3answers
344 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 ...
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3answers
2k 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 ...
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2answers
3k 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 ...
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1answer
814 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 ...
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1answer
41 views

Custom Plugin For Converting CSV To MySQL

I wrote a plugin to add a csv file to the database. I created a custom table to use. My file path looks like this, wuno-uploader/wuno-uploader.php wuno-uploader/inventory.csv On an settings option ...
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2answers
69 views

PHP code inside shortcodes

Basically, I have this line of code: <?php echo do_shortcode('[O_U user_name="operator" blocked_message="This page is restricted for guests."] **Content Goes here** [/O_U]'); ?> Now, inside ...
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2answers
36 views

What happens if I overwrite the current wp_options table with a backup from a week ago?

I have a rather silly situation. I tried this query UPDATE wp_options SET option_value = 'a:0:{}' WHERE option_name = 'active_plugins'; which disabled all my plugins. I was testing some issues on ...
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2answers
125 views

Query All users that has post

I have this query so far : $user_args = array( 'role' => 'frontend_vendor', 'orderby' => 'display_name', 'order' => 'ASC', ...
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2answers
130 views

Changing Table Prefix for an Existing WordPresss Site

Hoping someone can assist with Wordpress table prefix for an already established site. What is the best approach in changing the existing table prefix within both DB and wp-config file to reflect new ...
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1answer
170 views

How to remove 'GROUP BY' from SQL query produced from get_posts?

Wordpress, Archive Cateory page. From default WP_Query->get_posts() we are getting something like this: SELECT wp_posts.ID FROM wp_posts INNER JOIN wp_term_relationships ON (wp_posts.ID = ...
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2answers
98 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 ...
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1answer
139 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=''){ ...
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1answer
103 views

Search and replace in post content

I am about to change themes on my site and also a plugin that creates tabs with a post. I need to replace multi-line text with other multi-line text and can't work out how to do it. I have tried ...
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2answers
153 views

wpdb custom post_type problem

I want to use custom post type in my custom SQL query, but, when I add the custom post type im my query, I get no results. Where's my probelm ? This is the code I've tried $top5_ov_performance = ...
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1answer
588 views

WP_USE_EXT_MYSQL

Here is the constructor for the wpdb class as found in the source code. According to a google search this has been recently renamed from USE_EXT_MYSQL. However I cannot find anywhere in the source ...
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1answer
233 views

Wordpress database error - Error in SQL syntax - I can't identify any error?

I am trying to write function that checks whether an email address is stored in my database or not. I've written the following PHP code:: function check_my_users( $email_address ) { global ...
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1answer
35 views

Why doesn't this code add a table to my database?

To get to the point, I'm trying to add a database table upon installation of my plugin. Here's my code: global $scimp_db_version; $scimp_db_version = "1.0"; function scimp_install () { global ...
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1answer
5k views

wpdb->insert multiple record at once

So after I have created the table 'settings-table' i want to add a couple of records to it. This is how I want to do it, not the best way, so I need a better way to do this because I will add more ...
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1answer
332 views

How to determine what is generating large amount of database queries?

For some reason, my Wordpress site is using a lot of memory (spiking at 72MB) and generating a huge amount of database queries (76923 according to Wp-Memory-Usage. I'm really not sure why this would ...
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1answer
81 views

SQL database export-import

I develop websites containing WordPress blogs as well as other PHP pages I design. When I make changes to sites locally on my test server I do a SQL database dump using myPHPAdmin. How can I avoid ...
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1answer
37 views

For best DB performance should I serialize all theme options together or by type?

If my theme has a lot of options is it better to store all options in one database entry, or to use a databse entry for each group of options? IE would I name all options like this ...
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1answer
190 views

How to adjust code to refresh a dropdown box with tags that are active on filtered category listing

I have multiple custom tags setup (ptags) and custom posttypes (products) and made it so i can filters posts by multiple tags in a category. Currently the code retrieves tags from posts relating to ...
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2answers
726 views

$wpdb: Counting posts corresponding to 3 terms in 3 different taxonomies

It's easier if I made an example: I have a custom post type MYPOSTTYPE, with 3 taxonomies TAX_1, TAX_2 and TAX_3 If I have 3 terms: 'TERM_TAX_1' in TAX_1, 'TERM_TAX_2' in TAX_2, and 'TERM_TAX_3' in ...
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2answers
664 views

Join new table with SQL query

I created a plugin with a new table (wp_soundcloud) and I need to retrieve the data from that new table along with the post data. Here is my query: $querystr = " SELECT $wpdb->posts.*, ...
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2answers
413 views

Distinction on meta value on pre_get_posts

I've got a special "position" meta field for posts which can be between 0 and 37. 0 Is ignored, and everything else can have obviously any number between and including 1 and 37. But this of course ...
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1answer
2k views

Accessing WordPress MySQL Database via Data Connection in Visual Studio 2010 using C#

So I've Googled and followed countless tutorials, read documentation on MySQL, Visual Studio, WordPress, and Plesk. I try to leave posting on this site as the final option and it seems it has come to ...
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2answers
656 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 ...
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1answer
2k 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 ...
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3answers
841 views

WordPress Custom Query

I have posts that use a custom field for start date and end date. query_posts returns an array of posts that exist in the category I'm filtering. How do I query posts using this custom field that has ...
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1answer
2k views

Tags to Post-ID mysql query. Tag Search

Im trying to implement a tag-based search. When i specify certain tags, tagged posts will be searched and the post-id will be displayed that matches the searchcriteria. Currently it only works for a ...
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1answer
387 views

MySql database help for a plugin

I am using a WordPress plugin called MyReview but I want some changes to it. That plugin has feature to review posts, where users will come and give star ratings to the post according to categories, ...
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2answers
56 views

Create WP_Query to search for posts by their categories or their parent/child categories

Hello I am really sorry if this has been asked before but I couldn't find the exact solution I need. So here's the problem I want to create a search in my Wordpress page. Whenever a user submits the ...
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2answers
54 views

What is a valid parent for get_terms()?

get_terms($taxonomy, array('parent' => $parent)); This works for some parents and returns an empty array for others. I checked if a term with the parent ID exists and if the same ID is in the ...
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1answer
56 views

Delete all post meta except featured image

My aim is to clear up my database entries. I did a migration from blogger which added many useless post_meta. I found a plugin (db reset) that has the option to reset/delete all post meta. However if ...
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1answer
13 views

My SQL function to change user_name

My wordPress database was hacked and all users_names were changed to the same thing. I'd like to write a mySql query to replace all usernames that = "x" to the user_nicename. I'm unsure how to do this ...
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1answer
114 views

Convert simple SQL Query to WordPress query

I'm trying to 'batch' update the value in my post_parent fields in my wp_posts table. I can do it from within phpmyadmin using the following SQL Query: UPDATE wp_posts SET post_parent = '8' WHERE ...
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1answer
42 views

WSoD being caused by this piece of code

This is a function I'm writing which is supposed to post an input along with some other information, to a database. As of right now, activating the plugin produces a WSoD, when the function is removed ...
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1answer
1k views

Wordpress database import: Row size too large

I've done a dump of my Wordpress database using Windows's command prompt: mysqldump -u username -p databasename > filename.sql Then, on a different server, imported it using: mysql -u username ...