How can you change "Hansen" into "Nilsen" in the LastName column in the Persons table?
UPFATE clause is used to modify values in database tables.
String literals should be enquoted.
UPDATE table_name SET column1 = value1, column2 = value2, ... WHERE condition;
  • The SQL UPDATE Statement

    The UPDATE statement is used to update existing records in a table.


    UPDATE table_name
    SET column1=value1,column2=value2,...
    WHERE some_column=some_value;


    Notice the WHERE clause in the SQL UPDATE statement! The WHERE clause specifies which record or records that should be updated. If you omit the WHERE clause, all records will be updated!
    Read more: The SQL UPDATE Statement

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