如何使用Where子句更新许多行

Question

我的桌子下面有行：

id |  s1  |  s2  |  s3  |  s4  |  s5  |
---------------------------------------
1  |  6   |  2   | null | null | null |
---------------------------------------
2  |  8   |  1   | null | null | null |

我已经有了这个值，我想将数据添加到 null

的单元格中

我的查询是：

UPDATE table1
SET s3 = "some_s3" WHERE id = 1
SET s4 = "some_s4" WHERE id = 1
SET s5 = "some_s5" WHERE id = 1
SET s3 = "some_s3" WHERE id = 2
SET s4 = "some_s4" WHERE id = 2
SET s5 = "some_s5" WHERE id = 2

像这样的东西。但我需要更新千行。

Answer 1

尝试：

 UPDATE table1
SET s3 = "some_s3" WHERE s3 is null
 UPDATE table1
SET s4 = "some_s4" WHERE s4 is null
 UPDATE table1
SET s5 = "some_s5" WHERE s5 is null

Answer 2

嗯，最简单的方法是编写PHP脚本，如果你想更新大量数据。

Answer 3

UPDATE table1 SET s3='some_value1',s4='some_value2',s5='some_value3'

WHERE s3 is null and s4 is null and s5 is null