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

Question

我有一张名为汉堡包的 table 。我想清理数据并删除汉堡包名称周围的一些垃圾文本，并且仅在标题字段中使用汉堡包的名称。到目前为止，这是我的小脑袋所能聚集的一切......

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，但我只想找到一种方法来删除汉堡名称周围的文本。大约有 3,000 条记录的汉堡名称周围有完全相同的文本。 TIA。

Answer 1

这可能会让您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);

这将为您提供:

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 %,";

它确实有点依赖于汉堡包后面有一个逗号......