-- 批量修改所有表中字段名为 aaa 的字段类型
-- 要保证字段是可以修改的
declare @sql varchar(1000)
declare cur_sql cursor for
select 'alter table ' + a.name + ' alter column ' + b.name + ' varchar(20) '
from sys.objects a,sys.columns b
where a.object_id = b.object_id and b.name = 'aaa' and a.type = 'U'
open cur_sql
fetch cur_sql into @sql
while @@fetch_status = 0
begin
-- 每次修改
execute ( @sql )
fetch cur_sql into @sql
end
close cur_sql
deallocate cur_sql
-- 还有一种方案是把所有的语句 取 出来，然后再运行
-- 如下，把结果集里的语句copy到查询分析器里
select 'alter table ' + a.name + ' alter column ' + b.name + ' varchar(20) '
from sys.objects a,sys.columns b
where a.object_id = b.object_id and b.name = 'aaa' and a.type = 'U'