How to delete all values ​​of a certain field in mysql

Mysql method to delete all values ​​​​of a certain field: execute the [update table_name set field_name = ''] command. If you want to delete a field, execute the [ALTER TABLE table_name DROP COLUMN field] command.

Specific method:

(Learning video recommendation: mysql video tutorial)

Delete fields value, you can clear all values ​​

UPDATE table_name SET field_name = '';

(Related recommendations: mysql tutorial)

Delete the field (this field will no longer exist)

ALTER TABLE table_name DROP COLUMN field_name;

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