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sql字符替换与利用sql存储过程替换

  • 2020-03-24 13:12
  • 数据库知识
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如果你在替换数据库的指定字符串或字符,我们需要利用sql字符替换,但是对于超大容量的数据替换我们可能要用到sql存储过程替换 物,因为存储过程效率高于我们自己写的替换函数哦。

如果你在替换数据库教程的指定字符串或字符,我们需要利用sql字符替换,但是对于超大容量的数据替换我们可能要用到sql存储过程替换 物,因为存储过程效率高于我们自己写的替换函数哦。

update 数据表 set 字段=replace(字段,'.','')

下面看一款查询结果字符替换

--select * from sjz_dlfzb

--select replace (substring(tbrq,2,len(tbrq)-2),'$','-') from sjz_dlfzb

update sjz_dlfzb set tbrq=replace (substring(tbrq,2,len(tbrq)-2),'$','-')

update sjz_hpzb set wdm=replace (substring(wdm,2,len(wdm)-2),'$','-') where hp_id !='130121010001'

update sjz_hpzb set dxslx=replace (substring(dxslx,2,len(dxslx)-2),'$','-')

select * from sjz_nslzb

update sjz_nslzb set tbrq=replace (substring(tbrq,2,len(tbrq)),'$','-') where nsl_id='130131030061'

select * from sjz_nslzb where nsl_id='130131030061'

select * from sjz_nslzb where nsl_id='130132030033'update sjz_nslzb set tbrq=replace (tbrq,'$','-') where nsl_id='130132030033'sjz_xpzb

update sjz_xpzb set wd=replace (substring(wd,2,len(wd)),'$','-')

利用存储过程替换字符

create table hello(id int identity(1,1),content text) insert into hello select 'img align=baseline alt= border=0 src=/_p1.jpgbr' union all select 'img align=baseline alt= border=0 src=_p1.jpgbr' --定义替换/删除的字符串 declare @s_str varchar(8000),@d_str varchar(8000) select @s_str='' --要替换的字符串 ,@d_str='' --替换成的字符串 --定义游标,循环处理数据 declare @id int declare #tb cursor for select id from hello open #tb fetch next from #tb into @id while @@fetch_status=0 begin --字符串替换处理 declare @p varbinary(16),@postion int,@rplen int select @p=textptr(content),@rplen=len(@s_str),@postion=charindex(@s_str,content)-1 from hello where id=@id while @postion0 begin updatetext hello.content @p @postion @rplen @d_str select @postion=charindex(@s_str,content)-1 from hello where id=@id end fetch next from #tb into @id end close #tb deallocate #tb --显示结果 select * from hello --删除数据测试环境 drop table hello