begin tran
commit
--rollback
--声明一个变量
```sql
declare @tbname as nvarchar(100);
```
--声明一个游标用来遍历查询到的结果
```sql
declare C_userID CURSOR for
select distinct TABLE_NAME from information_schema.COLUMNS
where TABLE_NAME like '%_STC' or TABLE_NAME like '%_DYN' or TABLE_NAME like '%_RTK'
```
--打开游标
```sql
open C_userID;
```
--获取游标指向的数据
```sql
fetch next from C_userID into @tbname;
while @@FETCH_STATUS = 0
```
BEGIN
--执行具体的操作
--删除未来的数据
--DELETE
--FROM [HiMonitorDB].[dbo].[11350069_STC]
--WHERE aDatetime >'2020-02-03'

--create NONCLUSTERED INDEX 索引名称 ON 表名(字段名)
EXEC('delete from [HiMonitorDB].[dbo].['+@tbname+'] where aDatetime>getdate()')
--游标指向下一条数据
```sql
FETCH next from C_userID into @tbname;
```
END
--关闭游标
CLose C_userID
--释放游标
DEALLOCATE C_userID;