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Fix Illegal/Mismatched Collation Issue

This guide provides steps to resolve collation mismatches in the VLSM database using phpMyAdmin by standardizing all tables and columns to use utf8mb4_general_ci collation.

Steps

  1. Access phpMyAdmin — Open your browser and navigate to the phpMyAdmin interface. Authenticate with your credentials.

  2. Navigate to VLSM Database — Select the vlsm database from the left sidebar.

  3. Open Operations Tab — Click the "Operations" tab at the top of the page.

  4. Locate Collation Settings — Scroll down to find the "Collation" section.

  5. Configure Collation — Select utf8mb4_general_ci from the collation dropdown menu.

  6. Enable Bulk Changes:

  7. Check "Change all tables collations" checkbox

  8. Check "Change all tables columns collations" checkbox

  9. Execute Changes — Click the "Go" button to apply the collation updates.

  10. Monitor Completion — Allow phpMyAdmin to process the database modifications. Completion time depends on your database size.