Update 語句用於修改表中的數據。
UPDATE 表名稱 SET 列名稱 = 新值 WHERE 列名稱 = 某值
LastName
FirstName
Address
City
Gates
Bill
Xuanwumen 10
Beijing
Wilson
Champs教程-Elysees
我們為 lastname 是 "Wilson" 的人添加 firstname:
UPDATE Person SET FirstName = 'Fred' WHERE LastName = 'Wilson'
LastName
FirstName
Address
City
Gates
Bill
Xuanwumen 10
Beijing
Wilson
Fred
Champs-Elysees
我們會修改地址(address),並添加城市名稱(city):
UPDATE Person SET Address = 'Zhongshan 23', City = 'Nanjing'
WHERE LastName = 'Wilson'
LastName
FirstName
Address
City
Gates
Bill
Xuanwumen 10
Beijing
Wilson
Fred
Zhongshan 23
Nanjing