替换多个mysql数据库列中的字符

Question

Hello I am new to mySQL and i am having trouble trying extracting data from my db by using keywords. I have 2 columns (tags and categories). I have done this before using the LIKE '%keyword%' in my query. The problem is in the db i am using now each keyword is separated with a ';' i would like to know if it is possible to somehow separate each keyword by replacing the semi-colon with a space? Or if it's easier use the same query but instead of using '%' to separate i use semi-colons? sorry if its a newbie question but i am struggling hard with this and really need some help.

Thanks

Answer 1

您可以使用REPLACE函数将分号替换为空格（或其他任何空格）：

UPDATE MyTable SET tags = REPLACE(tags,';',' '), categories = REPLACE(categories,';',' ')

Answer 2

The problem is in the db i am using now each keyword is separated with a ';' i would like to know if it is possible to somehow separate each keyword by replacing the semi-colon with a space? Or if it's easier use the same query but instead of using '%' to separate i use semi-colons?

Example table:

CREATE TABLE `test` (  
  `tags` varchar(255) NOT NULL,
  `categories`  varchar(255) NOT NULL  
) ENGINE=MyISAM DEFAULT CHARSET=latin1;

Sample data:

insert into `test` values ('tag', 'cat' );
insert into `test` values ('tag', 'cat1;cat2;cat3;' );

Example select:

select * from `test` where `categories` LIKE '%cat1;%';
+------+-----------------+
| tags | categories      |
+------+-----------------+
| tag  | cat1;cat2;cat3; |
+------+-----------------+
1 row in set (0.00 sec)