Just place some SQL on in the box and save it as a report. You can save multiple reports and they will be listed on the Admin Menu so you can quickly run them again anytime with just one click. You can place your reports on the User’s Dashboard based on Roles. You can also put a report on a Page or Post using a shortcode like [SQLREPORT name=”My Report” style=”padding: 6px;” /]
There is also an shortcode for the wpdb::get_var function that you can use to display a single value from your database. For example, this will display the number of users on your site: 
[sqlgetvar]SELECT COUNT(*) FROM wp_users[/sqlgetvar] 
Note: because of a known exploit in the WordPress shortcode functionality it is required that an admin user create an SQL Report with the exact query that will be used in the sqlgetvar shotcode, otherwise any subscriber could white their own shortcode query.
If you want to include an “Export to CSV” button on your page or post then use the additional shortcode [SQLEXPORTCSV] once on any page or post that contains a report you want visitors to be able to download. Thanks to @loristictok and @rob66bnu for posting the suggestion with the JavaScript that I used to make this new Shortcode. 
Note: Adding this shortcode to the just one time will insert the “Export to CSV” button at the top of every HTML Table on the page.
<h4>Automatic Database Backups</h4>
Your database can be automatically saved and archived every hour and/or every day, and backups can be emailed to the address you specify. You can also restore the data to your WP DB or an external DB, which makes copying your database to another server and easy task.

EZ SQL Reports Shortcode Widget and DB Backup

Create and save SQL Reports in your WP Admin and place them on pages and posts with a shortcode. Keep your database safe with automatic backups.

it2911

TiDB is a high-performance database that is compatible with the MySQL protocol. Since MySQL has deprecated the SQL_CALC_FOUND_ROWS function, TiDB also has no intention of offering the SQL_CALC_FOUND_ROWS function. This leads to an error in WordPress when using TiDB, indicating that SQL_CALC_FOUND_ROWS is not supported, and submissions cannot be displayed correctly.
WordPress is also currently working on this issue, but it seems that more time is needed. #47280 Remove usage of deprecated MySQL SQL_CALC_FOUND_ROWS from WP_Query
This plugin solves the issue of TiDB not providing the SQL_CALC_FOUND_ROWS function. Once this plugin is activated, parts of WP_Query that use SQL_CALC_FOUND_ROWS will be replaced with the COUNT(*) function.
This plugin is entirely based on the method mentioned by @akramipro in the article, and this solution works perfectly and addresses the issue. I’ve turned this method into a plugin so that those using TiDB can easily resolve this problem. Many thanks to @akramipro for the excellent work, and I hope the official WordPress team can address this issue sooner.
<h3>Contribute</h3>
Contribute to this plugin on <a href="https://github.com/pingcap/wordpress-tidb-plugin" rel="nofollow ugc">github.com/pingcap/wordpress-tidb-plugin</a>

TiDB Compatibility


This plugin is a must-have if you are running TiDB as the database instead of MySQL/MariaDB.


Must have for TiDB users

This plugin is an official tool provided by PingCAP, designed to solve compatibility issues between TiDB and WordPress.

EZ SQL Reports Shortcode Widget and DB Backup vs TiDB Compatibility