How to update table data in MySQL?

To update table data in MySQL using the UPDATE statement, you can follow these steps:

1. Open the MySQL command line client or other MySQL graphical interface tool, and connect to the MySQL database server.
2. Make sure to select the database where you want to update the data by using the USE statement to choose the database. For example, use the following statement to select a database named “mydatabase”:
3. Switch to mydatabase.
4. Write an UPDATE statement specifying the table to be updated, the field to be updated, and the update condition. Here is a basic syntax example of an UPDATE statement:
5. Update the table by setting column values to specific ones based on a condition.
6. name of the table to update data in.
7. column1 will be updated to value1, column2 to value2, etc.
8. Condition for updating data. If no condition is specified, all rows will be updated.
9. For example, the following statement updates the age of all users with the name “John” in the “users” table to 25.
10. Update the age of the user named John to 25.
11. Execute the UPDATE statement to update the table data. In the MySQL command line client, simply press the Enter key to execute the statement. In a graphical interface tool, you may need to click on “Execute” or a similar button.
12. Check the updated data. You can use a SELECT statement to check the updated results. For instance, the following statement will retrieve information of all users with the name “John” in the table “users”:
13. Show all the information of the users whose name is ‘John’.
14. The query will display the updated data, where the user’s age with the name of “John” has been updated to 25.

Please be careful when updating data, ensuring correct table names, field names, conditions, and new values are provided to avoid accidentally updating incorrect data. It is advisable to back up the database before updating data.