How to Change MySQL Database Collation to UTF-8 Using phpMyAdmin

Article Information

Article ID: KB-MySQL-001
Last Updated: August 12, 2025
Difficulty Level: Intermediate
Estimated Time: 15-30 minutes

Overview

This knowledge base article provides step-by-step instructions for changing the collation of all tables in a MySQL database to UTF-8 character encoding using phpMyAdmin. UTF-8 collation ensures proper handling of international characters and symbols in your database.

Important: Always create a complete database backup before making any structural changes to your database.

Prerequisites

• Active hosting account with iFastNet.com
• Access to your hosting control panel (cPanel)
• Database with existing tables
• Basic understanding of database operations

Accessing phpMyAdmin

Method 1: Through iFastNet Client Portal

1. Navigate to https://ifastnet.com/portal/clientarea.php
2. Log in using your iFastNet account credentials
3. Locate and click on your hosting service from the services list
4. Click on "Login to cPanel" button
5. Once in cPanel, scroll down to the "Databases" section
6. Click on "phpMyAdmin" icon

Method 2: Direct cPanel Access

1. Navigate to https://yourdomain.com/cpanel (replace "yourdomain.com" with your actual domain name)
2. Enter your cPanel username and password
3. Once logged in, scroll down to the "Databases" section
4. Click on "phpMyAdmin" icon

Getting Support

If you encounter issues accessing your hosting account or cPanel:

1. Visit https://support.ifastnet.com/login.php
2. If this is your first time accessing support, click "Register" to create a support account
3. Once registered and logged in, create a new support ticket describing your access issue

Step-by-Step Instructions

Step 1: Create a Database Backup

1. In phpMyAdmin, select your database from the left sidebar
2. Click on the "Export" tab at the top of the interface
3. Ensure "Quick" export method is selected
4. Keep the format as "SQL"
5. Click "Go" to download the backup file
6. Save the backup file to a secure location on your computer

Step 2: Select Your Database

1. From the left sidebar in phpMyAdmin, click on the name of the database you want to modify
2. The database will expand to show all tables contained within it
3. Verify you have selected the correct database by checking the database name appears in the main content area

Step 3: Access Database Operations

1. With your database selected, click on the "Operations" tab in the main content area
2. This tab contains various database-level operations and settings

Step 4: Change Database Collation

1. In the Operations tab, locate the "Collation" section
2. Click on the dropdown menu next to "Collation"
3. Scroll through the list and select one of the following UTF-8 options:
   • utf8mb4_unicode_ci (Recommended - supports full UTF-8 including emojis)
   • utf8mb4_general_ci (Alternative UTF-8 option)
   • utf8_unicode_ci (Legacy UTF-8 support)
   • utf8_general_ci (Legacy UTF-8 alternative)
4. Click "Go" to apply the collation change to the database

Step 5: Change Collation for All Tables

1. After changing the database collation, you need to modify each table individually
2. From the left sidebar, click on the first table name in your database
3. Click on the "Operations" tab for that specific table
4. In the "Table options" section, locate the "Collation" dropdown
5. Select the same UTF-8 collation you chose for the database (e.g., utf8mb4_unicode_ci)
6. Click "Go" to apply the changes
7. Repeat steps 2-6 for each table in your database

Step 6: Alternative Bulk Method Using SQL

For databases with many tables, you can use SQL commands to change all table collations at once:

1. Click on the "SQL" tab in the main phpMyAdmin interface
2. Enter the following SQL command (replace your_database_name with your actual database name and adjust the collation as needed):

ALTER DATABASE your_database_name CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;

3. Click "Go" to execute the command
4. To change all table collations, you'll need to generate ALTER TABLE statements. Run this query to generate the commands:

SELECT CONCAT('ALTER TABLE ', table_name, ' CONVERT TO CHARACTER SET utf8mb4 COLLATE utf8mb4_unicode_ci;') AS sql_statements
FROM information_schema.tables
WHERE table_schema = 'your_database_name';

5. Copy the generated ALTER TABLE statements from the results
6. Paste them back into the SQL tab and execute them

Step 7: Verify Changes

1. Select your database from the left sidebar
2. Check that the database collation now shows your selected UTF-8 collation
3. Click on individual tables and verify their collations have been updated
4. Test your application to ensure it's functioning correctly with the new collation

Important Considerations

Character Set vs Collation

• Character Set: Defines which characters can be stored (utf8mb4 recommended)
• Collation: Defines how characters are sorted and compared (utf8mb4_unicode_ci recommended)

Recommended UTF-8 Options

• utf8mb4_unicode_ci: Best choice for new applications, supports full Unicode including emojis
• utf8_unicode_ci: Suitable for legacy applications that don't require full Unicode support

Data Integrity

• Changing collation does not alter existing data content
• However, sorting and comparison behavior may change
• Test thoroughly after making changes

Troubleshooting

Common Issues

Issue: phpMyAdmin times out during operation
Solution: Process tables in smaller batches or use SQL commands instead of the GUI

Issue: Foreign key constraints prevent table modification
Solution: Temporarily disable foreign key checks by running SET FOREIGN_KEY_CHECKS=0; before your changes, then re-enable with SET FOREIGN_KEY_CHECKS=1;

Issue: Application displays strange characters after change
Solution: Ensure your application's database connection also specifies UTF-8 encoding

Getting Additional Support

If you encounter technical difficulties:

1. Visit https://support.ifastnet.com/login.php
2. Log in to your support account (register if first time)
3. Create a new ticket with detailed information about the issue
4. Include your domain name, database name, and specific error messages

Post-Implementation Checklist

• [ ] Database backup created and verified
• [ ] Database collation changed to UTF-8
• [ ] All table collations updated to match
• [ ] Application tested for proper functionality
• [ ] Character display verified in application
• [ ] Performance impact assessed (if any)

Conclusion

Changing your MySQL database collation to UTF-8 ensures proper handling of international characters and modern text encoding standards. Following these steps through phpMyAdmin provides a user-friendly method to update your database structure while maintaining data integrity.

Remember to always maintain regular backups and test changes in a development environment when possible before applying them to production databases.