如何在mysql查询中查找和替换字符串

Question

I have something like this

No. | Incorrect_Keyword | Correct Keyword

1 | flash | Flash Player

2 | flash player | Flash Player

3 | flash player plugin | Flash Player

4 | flash player plgin | Flash Player

It's saved in csv file and I use PHP to read each line and replace

The problem is when I run query

$query="UPDATE keyword SET keyword= REPLACE(keyword, 'incorrect_keyword',  'correct_keyword') WHERE INSTR(keyword, 'incorrect_keyword') > 0"; 

It replace all the "flash" to "Flash Player" So record number 2 will become "FLash Player player" How to make it right? Thanks

Answer 1

如果您要将所有Flash值都删除到Flash Player中，则可以简单地使用like查询。

UPDATE `keyword` set `keyword` = 'Flash Player' where `keyword` like '%flash%';

Answer 2

You have to use LIKE instead of INSTR

So your query must be something like below

UPDATE keyword SET keyword= REPLACE(keyword, 'incorrect_keyword',  'correct_keyword') WHERE `keyword` LIKE CONCAT('%',`incorrect_keyword`,'%');

supposed incorrect_keyword and keyword are column names

Answer 3

为更新添加一个ORDER BY：

$query="UPDATE keyword SET keyword= REPLACE(keyword, `incorrect_keyword`,  `correct_keyword`) WHERE INSTR(keyword, 'incorrect_keyword') > 0" ORDER BY No DESC; 

Answer 4

Some php equivalent of ucwords is here.

https://www.thingy-ma-jig.co.uk/blog/30-09-2010/mysql-how-upper-case-words

A bit tedious but should be helpful.