How can I update all the data in a table in MySQL?

To update data for the entire table, you can use the UPDATE statement without setting a WHERE clause, for example:

UPDATE 表名 SET 字段名1 = 新值1, 字段名2 = 新值2, ...;

In this case, “table name” refers to the name of the table being updated, while “field name 1,” “field name 2,” etc. represent the names of the fields being updated, and “new value 1,” “new value 2,” etc. are the new values for the respective fields.

For example, update all records in the “students” table where the “age” field is 20 and the “grade” field is 3.

UPDATE students SET age = 20, grade = 3;

Please be careful when updating the data in the entire table, as it will update all records in the table.