进行数据拆分,我们将利用 SQL Server 的STRING_SPLIT函数,但需注意STRING_SPLIT返回的是一个行集,不适合直接用来生成多个列。我们可以通过ROW_NUMBER()函数为每个拆分的值标上行号。 WITHSplitNamesAS(SELECTID,valueASNamePart,ROW_NUMBER()OVER(PARTITIONBYIDORDERBY(SELECTNULL))ASPartNumberFROMOriginalTableCROSSAPP...
In the 1st part of this post, I explained how to create a partitioned table using a partition function as well as a partition schema. Now I’ll continue talking about how to merge or split partitions changing the partition function and the partition schema and how to move data between part...
Regards, SQL Server Lover. Anonymous June 23, 2014 Would you recommend split range operation in case of existing table with the data? Or do you suggest to have drop cluster index, partition schema/function and re-create with the required addition/modification? As...
(@s,@i+1,@nextSptrIndex-1-@i) INSERT INTO @t VALUES(@tmp) SET @i+=DATALENGTH(@tmp)/2+@lenSptr END IF @removeEmpty=1 BEGIN DELETE @t WHERE S='' END IF @unique=1 BEGIN WITH cteA AS (SELECT ROW_NUMBER() OVER(PARTITION BY S ORDER BY S) AS 'ID' FROM @t) DELETE cteA...
本文要做的就是单句SQL实现该功能。 先分析一下,该业务有两个关键点。 一是字符串拼接,oracle(11.2)提供了listagg函数已经实现了该功能,我们直接使用就可以。 二是字符串拆分,oracle没有实现该功能,但是java提供了split函数实现了字符串拆分功能。 我们可以参考java的split函数写一个oracle版split函数。split函数的功...
有这样一个case , 用户的10g产品数据库中有一张按照月份划分的RANGE分区表 , 其范围为Less than (maxvalue)的最后一个Partition分区总是为空Empty的, 用户每隔半年会对这个MaxValue Partition 执行Split Partition 操作, 以便存放后续月份的数据, 同时这个表上还有一个非分区索引Nonpartitioned indexes。 满以为Split...
A new file group, data file, and partition are created for the next month during the last week of the current month. This monthly maintenance task occurred without issue while DW was hosted in SQL2K8 R2, however, it failed after ...
You split a partition of the table by using the ALTER PARTITION function. In this scenario, an access violation may occur. Cause This issue occurs because SQL Server 2012 typically checks whether the identity column increases or decreases when you sp...
SplitRangePartition 方法Splits an existing range partition into two parts based on a supplied boundary value.命名空間: Microsoft.SqlServer.Management.Smo 組件: Microsoft.SqlServer.Smo (在 Microsoft.SqlServer.Smo.dll 中)語法 C# 複製 public void SplitRangePartition( Object boundaryValue ) 參數 ...
Assume that you use partitioned graph tables in SQL Server 2017 on Linux or Windows. When you merge or split a partition, such as by using the ALTER PARTITION FUNCTION statement and the partition is not empty,...