Home Database Mysql Tutorial mySQL中replace的用法_MySQL

mySQL中replace的用法_MySQL

Jun 01, 2016 pm 01:23 PM
replace

bitsCN.com mysql replace实例说明:

UPDATE tb1 SET f1=REPLACE(f1, 'abc', 'def');
REPLACE(str,from_str,to_str)
在字符串 str 中所有出现的字符串 from_str 均被 to_str替换,然后返回这个字符串

这个函数用来批量替换数据中的非法关键字是很有用的!如下例子:

例1:UPDATE BBSTopic SET tcontents = replace(replace(tcontents,'共产党','') ,'找死','') where tcontents like '%共产党%' or tcontents like '%找死%'
例2:UPDATE typetable SET type_description=REPLACE(type_description,'360','http://www.bitsCN.com');

mysql replace用法

1.replace into
replace into table (id,name) values('1','aa'),('2','bb')
此语句的作用是向表table中插入两条记录。如果主键id为1或2不存在
就相当于
insert into table (id,name) values('1','aa'),('2','bb')
如果存在相同的值则不会插入数据

2.replace(object,search,replace)

把object中出现search的全部替换为replace

select replace('www.bitsCN.com','w','Ww')--->WwWwWw.bitsCN.com

例:把表table中的name字段中的aa替换为bb

update table set name=replace(name,'aa','bb')

MySQL replace函数我们经常用到,下面就为您详细介绍MySQL replace函数的用法,希望对您学习MySQL replace函数方面能有所启迪。

最近在研究CMS,在数据转换的时候需要用到mysql的MySQL replace函数,这里简单介绍一下。

比如你要将表 tb1里面的 f1字段的abc替换为def

UPDATE tb1 SET f1=REPLACE(f1, 'abc', 'def');
REPLACE(str,from_str,to_str)
在字符串 str 中所有出现的字符串 from_str 均被 to_str替换,然后返回这个字符串:
mysql> SELECT REPLACE('www.mysql.com', 'w', 'Ww');
-> 'WwWwWw.mysql.com'
这个函数是多字节安全的。

示例:
UPDATE `dede_addonarticle` SET body = REPLACE ( body,
'',
'' );
UPDATE `dede_addonarticle` SET body = REPLACE ( body,
'',
'' );
UPDATE `dede_addonarticle` SET body = REPLACE ( body,
'

',
'' );
UPDATE `dede_archives` SET title= REPLACE ( title,
'大洋新闻 - ',
'' );
UPDATE `dede_addonarticle` SET body = REPLACE ( body,
'../../../../../../',
'http://special.dayoo.com/meal/' );

mysql replace

用法1.replace intoreplace into table (id,name) values(‘1‘,‘aa‘),(‘2‘,‘bb‘)
此语句的作用是向表table中插入两条记录。
2.replace(object, search,replace)
把object中出现search的全部替换为replaceselect replace(‘www.bitsCN.com‘,‘w‘,‘Ww‘)--->WwW wWw.bitsCN.com

例:把表table中的name字段中的 aa替换为bbupdate table set name=replace(name,‘aa‘,‘bb‘)bitsCN.com
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