SQL Update語句是用來更新數據庫表中的記錄的，常見的寫法有以下幾種：
UPDATE table_name
SET column_name = new_value
WHERE condition;
UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;
UPDATE table_name
SET column_name = (SELECT new_value FROM another_table WHERE condition)
WHERE condition;
UPDATE table_name
SET column_name = CASE
WHEN condition1 THEN value1
WHEN condition2 THEN value2
ELSE default_value
END
WHERE condition;
UPDATE table1
JOIN table2 ON table1.id = table2.id
SET table1.column_name = table2.new_value
WHERE condition;
以上是SQL Update語句的常見寫法，根據實際需求選擇合適的方法來更新數據庫表中的記錄。
