sql server 利用游标搜索一个数据库内所有表固定类型的字段

alter procedure Full_Search(@string varchar(100))
as
begin
declare @tbname varchar(100) 
declare tbroy cursor  for select name from sysobjects  
where xtype='u' and (name like 'T0%' or name like 'T2%')  --第一个游标遍历以T0,T2开头的所有表
 
open tbroy
fetch next from tbroy into @tbname  --填充数据
while @@fetch_status=0 --假如检索到数据才处理
begin
   
 declare @colname varchar(100)
 declare colroy cursor for select name from syscolumns
 where id=object_id(@tbname) and xtype in (
 select xtype from systypes
 where name in ('varchar','nvarchar','char','nchar') --数据类型为字符型的字段
 ) --第二个游标是第一个游标的嵌套游标，遍历某个表的所有字段
 
 open colroy
 fetch next from colroy into @colname
 while @@fetch_status=0
 begin
  
 declare @sql nvarchar(4000),@j int
 select @sql='select @i=count(1) from ' +quotename(@tbname) +'  where '+ quotename(@colname)+' like '+'''%'+@string+'%'''
 exec sp_executesql @sql,N'@i int output',@i=@j output   --输出满足条件表的记录数
 if @j>0
 begin
 declare @v varchar(8000)
 set @v='select  distinct * from ' +quotename(@tbname) +'  where '+ quotename(@colname)+' like '+'''%'+@string+'%'''  ---输入满足条件表的信息
 --set @v='select  distinct  ' +quotename(@colname)+' from ' +quotename(@tbname) +'  where '+ quotename(@colname)+' like '+'''%'+@string+'%'''
 exec(@v)
 --print @v 
 end
 fetch next from colroy into @colname
 end      
  
 close colroy  --关闭游标
 deallocate colroy  --释放游标
 
 fetch next from tbroy into @tbname
 end
 close tbroy
 deallocate tbroy
 end


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