What is the command to update table data in mysql

The command to update table data in MySQL is UPDATE, which modifies existing data by updating all rows that meet the condition. The syntax is: UPDATE table_name SET column_name = new_value WHERE condition. It requires specifying the correct update conditions and taking into account primary keys and transactions to ensure data consistency.

MySQL table update data command

In MySQL, the command to update table data is UPDATE .

Syntax

<code class="sql">UPDATE table_name SET column_name = new_value
WHERE condition;</code>

Parameters

• table_name: The name of the table to update the data .
• column_name: The name of the column to be updated.
• new_value: The new value to be updated.
• condition: Update condition, used to specify the rows to be updated.

Example

Update the age of the student named "John" in the table students:

<code class="sql">UPDATE students SET age = 21 WHERE name = "John";</code>

Function

The UPDATE command is used to modify existing data in the table. It will update all rows that meet the conditions. If condition is omitted, all rows are updated.

Notes

• When using the UPDATE command, please make sure to specify the correct update conditions to avoid accidentally updating data.
• If the updated column is a primary key or foreign key, make sure the new value conforms to the table's constraints.
• Before using the UPDATE command, consider using transactions to ensure data consistency.

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