mysql - mysql 使用带有通配符的 substring_index 从字段中删除不需要的文本

Question

我有一张桌子叫汉堡包。我想清理数据并从汉堡包名称周围删除一些垃圾文本，并且只在标题字段中使用汉堡包的名称。到目前为止，这就是我的小脑袋所能鼓起的全部......

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 %.%";

我对 MySql 很烂，但我只是想找到一种方法来删除围绕汉堡名称的文本。大约有 3,000 条记录在汉堡包名称周围具有相同的确切文本。TIA。

Answer 1

这可能会让你朝着正确的方向前进：

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);

这会给你：

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 %,";

不过，它确实有点依赖于汉堡包后面有一个逗号....