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.

Frank Bueltge

Inpsyde GmbH

Simon Kraft

WP Media

ChriCo

Rene Reimann

s-hinse

With Search & Replace you can search for everything and replace this with everything but before you do this you can easily create a simple database backup and restore it.
For avoiding problem please keep in mind that this plugin search and replace strictly what is specified in “Replace With”. 
Common error example: 
Search For: http://web.com/wordpress/ 
Replace With: http://neuweb.com/wordpress 
The url become something like: http://neuweb.com/wordpresscontent/…
Correct “Replace with”: 
Search For: http://web.com/wordpress/ 
Replace With: http://neuweb.com/wordpress/ 
The url become something like: http://neuweb.com/wordpress/content/…
We have implemented special features!
The first one is “Replace a Domain / URL” that is useful for a quick and simple transfer or a migration of a WordPress site. 
The second feature is full support for serialized data. There are a lot more features – check them out! 🙂
Our goal with this plugin is to give you a good solution for manipulating your data for both Developers and Users of WordPress.
<blockquote>
Note: This plugin requires PHP 5.6 or higher to be activated.
</blockquote>
<a href="https://github.com/wp-media/search-and-replace" rel="nofollow ugc">Checkout our GitHub Repository</a>
<h4>Features</h4>
<ul>
<li>Search & replace data in your WordPress database</li>
<li>Change domain/URL of WordPress installation</li>
<li>Handle serialized data</li>
<li>Choose dry run or download SQL file</li>
<li>Change table prefix</li>
<li>Backup & restore your database</li>
<li>WordPress Multisite support</li>
<li>Localized and ready for your own language</li>
</ul>
<h4>Crafted by WP Media</h4>
Made by <a href="https://wp-media.me" rel="nofollow ugc">WP Media</a>.
<h4>Donation?</h4>
You want to donate – we prefer a <a href="https://wordpress.org/support/view/plugin-reviews/search-and-replace?rate=5#postform" rel="ugc">positive review</a>, not more.

Search & Replace

Search & Replace data in your database with WordPress admin, replace domains/URLs of your WordPress installation.

EZ SQL Reports Shortcode Widget and DB Backup vs Search & Replace