Step 1: Login to the Plesk panel and click on Databases button.
Step 2: There will be many databases. Select the database which you want to take backup. Then click on the Webadmin link.
Step 3: A new window will open. Click on the Export tab.
Step 4: Select the Export method as Quick and format as SQL. Click on Go.
It will create a zip file and automatically starts downloading once the backup is complete.
Step 5: Once the download completes, open the zip file and check the SQL backup.