Collation defines how MySQL sorts and compares text. It determines case sensitivity, accent sensitivity, and character set rules. Sometimes you may need to change collation to ensure consistent behavior across tables or to support specific languages.

 

Why Change Collation?

  • To fix errors when joining tables with different collations.

  • To support special characters (e.g., accented letters, non‑Latin scripts).

  • To enforce case‑insensitive or case‑sensitive comparisons.

  • To standardize collation across a database.

 

Changing Collation for a Database

  1. Log in to cPanel → phpMyAdmin.

  2. In the left sidebar, select the database.

  3. Click the Operations tab.

  4. Under Collation, choose the desired collation (e.g., utf8_general_ci, utf8mb4_unicode_ci).

  5. Click Go.  This sets the default collation for new tables in the database. Existing tables are not automatically updated.

 

Changing Collation for a Table

  1. In phpMyAdmin, select the database → click the table.

  2. Click the Operations tab.

  3. Under Table options → Collation, select the new collation.

  4. Click Go.  This updates the table’s default collation. Existing columns remain unchanged.

 

Changing Collation for a Column

  1. In phpMyAdmin, select the database → click the table.

  2. Click the Structure tab.

  3. Locate the column → click Change.

  4. In the Collation dropdown, select the new collation.

  5. Click Save.  This updates how MySQL stores and compares values in that column.

Notes

  • utf8mb4_unicode_ci is recommended for modern applications (supports full Unicode, including emojis).

  • Changing collation does not automatically convert existing data; it only changes how MySQL interprets it.

  • Always back up your database before making collation changes.

  • Mixing collations across tables can cause query errors.

 
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