-- 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"
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