Introduction
When applying an update to the WHMCS software an error stating Base table or view not found is displayed. The full error may look like:
Unable to complete incremental updates: Unable to import the 8.0.0 Alpha1 database file.
Unable to import /path/to/whmcs/resources/sql/upgrade800alpha1.sql: SQLSTATE[42S02]:
Base table or view not found: 1146 Table 'table_whmcs7.tbldomainpricing_premium' doesn't exist
This guide demonstrates how to resolve this error.
Cause
This error occurs when a table does not exist in the WHMCS MySQL database, but the update process needs to make a change to that table.
In this example the tbldomainpricing_premium table does not exist. It should be present.
A missing table could be caused by an update failure in the past, or accidental/malicious removal of the table.
Resolution
The table identified by the error message must be re-created. Follow these steps:
1. Navigate to the /resources/sql/install/ directory
2. Identify the .schema.sql file with the filename corresponding to the missing table name. In this example that's tbldomainpricing_premium.schema.sql:

3. Edit the file to view its contents
4. Copy the SQL CREATE TABLE command shown in the file. For example:

5. Using a database administration tool such as phpmyadmin, execute the SQL command copied from the .schema.sql file. For example:

6. Ensure the create query executes successfully:

7. You may now return to WHMCS and re-run the update process.