Yes . In the previous. chapter , we see how to generate "partition function" "parttiton schema" and "parttiton table" what can we do if we need to add or drop an table partition ? Here is exist status: /* add partition (oracl…
demo/* add partitions */ alter database xxx add filegroup FG_=fff_201708;alter database xxx add file (name = FG_fff_201708,filename = "M:\DATA\SQLDATA\fff_201708.ndf",size = 10MB,maxsize = unlimited,filegrowth = 10MB) to filegroup fff_201708;;al…
Dear all, Let get into business, the partitions on sql server is very different with that on oracle. I do not want to speak too much, Here is an example. At beginning, we should create a partition function CREATE PARTITION FUNCTION [PF_DATETIME_M_TES…
I can not believe that I had done this about two years Now we know there is totally different between oracle parttion table and sqlserver partition table. Here we go to show them , it used for range right, by the way, /****** Object: View [dbo].[part…
--假设已经存在Event Session删除 IF EXISTS (SELECT * FROM sys.server_event_sessions WHERE name='MonitorLongQuery') DROP EVENT SESSION MonitorLongQuery ON SERVER GO --创建Extended Event session CREATE EVENT SESSION MonitorLongQuery ON SERVER --添加Event(SQL完毕事件) A…
MySQL:5.6.35 OS:redhat5.8 今天更新数据库某些表字段,有如下两SQL: ①alter table xx modify xxxx;(表大概是77w) ②alter table sb add sbsb;(表大概是95w) 奇怪的是①产生的state为:copy to tmp table ②产生的state为:altering table 两表同样是百万级别的:后者执行虽慢,但是消耗时间不到1200s,而后者跑了2800s. 开始怀疑alter中的add 和modify 两个操…
Create a new table (using the structure of the current table) with the new column(s) included. execute a INSERT INTO new_table SELECT (column1,..columnN) FROM current_table; rename the current table rename the new table using the name of the current…
setp 1. First create New Edit. setp 2.Create New Table First Table Name is NParentRel then drag and drop the newly created Edt in NParentRel Table setp 3.Create Index for new created EDT in NParentRel Table the properties on index is AllowDuplicates…
In this article we will see how we can remove partitions from a table in a database in SQL server. In my previous post i had demonstrated how we can partition a table via T-SQL. Lets now remove the partitions and merge the data in a single partition.…
在更改分区内的文件后刷新表 refresh table tablename ; 我们平时通常是通过alter table add partition方式增加Hive的分区的,但有时候会通过HDFS put/cp命令往表目录下拷贝分区目录,如果目录多,需要执行多条alter语句,非常麻烦.Hive提供了一个"Recover Partition"的功能. 具体语法如下: MSCK REPAIR TABLE table_name; 原理相当简单,执行后,Hive会检测如果HDFS目录下存在但…