在sqlserver数据库中查询所有表的任意字段中某个值（例如值为a）

use sql  --sql改为数据库名
CREATE TABLE qResults (tName nvarchar(370), cname nvarchar(3630),[count] int)

declare @tname nvarchar(200)
declare @cname nvarchar(200)

declare @countOut nvarchar(200)
declare @sql nvarchar(max)
declare c_search cursor for 
select t.name,c.name from sysobjects t inner join syscolumns c on t.id=c.id where t.type='u'  and c.xtype in(56,167,175,231,239) order by t.name --xtype 这个地方限制类型为int varchar char nvarchar nchar 五种类型
open c_search
fetch next from c_search into @tname,@cname
while @@FETCH_STATUS=0
begin
   
   set @sql=N'select @countx=COUNT(*) from '+@tname +' where [' +@cname +'] =''a'' '
   
   print @sql
   EXECUTE sp_executesql @sql,N'@countx nvarchar(200) out ', @countx=@countOUT OUT

   insert into qResults values (@tname,@cname,@countOUT)

   
   fetch next from c_search into @tname,@cname
end
select tName 'Table',cname 'Field' from qResults where [count]>0 order by tname
close c_search
deallocate c_search

drop table qResults