如何更新Where子句

Question

我有表如下行很多行：

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

我已經這個值，我想將數據添加到細胞中，其中空

我的查詢：

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 

就像這樣。但我需要更新千行。

Answer 1

嘗試：

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

好，最簡單的方法是，如果你想更新大量數據寫一個PHP腳本。

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