mysql使用substring_index和通配符從字段中刪除不需要的文本

Question

我有一個名爲hamburgers的表。我想清理數據並從漢堡名稱周圍刪除一些垃圾文本，只在標題字段中使用漢堡包的名稱。到目前爲止，這是我的小腦袋可以鼓起...

UPDATE hamburgers 
SET title = SELECT SUBSTRING_INDEX(title, "My favorite hamburger is called %, I'm not really sure why. Yesterday was the first time I ate a %", -1) FROM hamburgers 
where title like "%My favorite hamburger is called %.%"; 

我吸在MySQL，但我只是想找出一種方法來去除環境漢堡包的名稱的文本。有三千條左右​​的記錄與漢堡包的名稱相同。 TIA。

Answer 1

這可能讓你在正確的方向前進：

select substring_index(substring_index("My favorite hamburger is called Whopper, I'm not really sure why. Yesterday was the first time I ate a Whopper","My favorite hamburger is called ",-1),",",1); 

這會給你：

Whopper 

所以：

UPDATE hamburgers 
SET title = substring_index(substring_index(title,"My favorite hamburger is called ",-1),",",1) 
where title like "My favorite hamburger is called %,"; 

它有點依賴於有是一個漢堡之後的逗號雖然....