How can a single SQL query be used to update two rows within the same column?

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A single SQL query can update two rows within the same column by using the WHERE clause with the OR operator.

Here is a sample query:

UPDATE my_table 
SET column_name = 'new_value' 
WHERE id = 1 OR id = 2;

This query updates the column "columnname" with the value "newvalue" for the rows with ID 1 and 2. The OR operator allows us to update both rows in a single query.

Note that the WHERE clause can be customized to match the specific requirements of your use case.