mysql concat拼接函数

<pre name="code" class="plain">mysql 拼接:

select concat('aa','bb') from zjzc.Notice

select title, concat("<a href='https://www.zjcap.cn/",replace(title,"<a href='",'')) from zjzc.Notice

where title like "%href='products%"

SET SQL_SAFE_UPDATES = 0;

update zjzc.Notice set title=concat("<a href='https://www.zjcap.cn/",replace

(title,"<a href='",''))   where title like "%href='products%"

SET SQL_SAFE_UPDATES = 0;

update zjzc.Notice set title=concat("<a href='https://www.zjcap.cn/",replace(title,"<a href='",'')) and detail= concat("<a href='https://www.zjcap.cn/",replace(title,"<a href='",''))  where title like "%href='products%"