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数据库/批量删除超前数据脚本.md

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+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;