批次的序号 [英] Sequence number for a Batch
问题描述
我有一种情况，我有多个批次，每批都是
序列号。对于每批，数字应从1开始。
例如：
Col.no1 Col.no2
- ---- -------
batch1 1
batch1 2
batch1 3
批次2 1
批次2 2
批次3 1
批次4 1
..... .....
在创建表时，在DB2中有一种简单的方法吗？
DB2中的Identity列只是按顺序创建数字。
请指教
Jignesh
Hi,
I have a situation where i have multiple batch and the each batch are
sequence numbers. For each batch, the number should start with 1.
For example:
Col.no1 Col.no2
------ -------
batch1 1
batch1 2
batch1 3
batch 2 1
batch 2 2
batch 3 1
batch4 1
..... .....
Is there a easy way to do it in DB2 while creating a table?
Identity column in DB2 simply creates numbers in sequence.
Please advise
Jignesh
推荐答案
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我有一种情况，我有多个批次，每批都是序列号。对于每批，数字应从1开始。
例如：
Col.no1 Col.no2
------ ------- <批次1 1批次1批次1批次2批次2 1批次2批次3 1
批次3 1
batch4 1
..... .....
在创建表时，有没有简单的方法在DB2中执行它？
DB2中的Identity列只是按顺序创建数字。
请建议
Jignesh
Hi,
I have a situation where i have multiple batch and the each batch are
sequence numbers. For each batch, the number should start with 1.
For example:
Col.no1 Col.no2
------ -------
batch1 1
batch1 2
batch1 3
batch 2 1
batch 2 2
batch 3 1
batch4 1
..... .....
Is there a easy way to do it in DB2 while creating a table?
Identity column in DB2 simply creates numbers in sequence.
Please advise
Jignesh
您的批次是否有限？您可以创建一个序列/批处理并编写一个
函数来执行动态SQL以使用适当的序列。
否则你可以使用thr ROW_NUMBER（）OVER（ PARTITION by
< batchcolumn>）OLAP函数可能会在插入之前被
批次的最大数量抵消。
干杯
Serge
-
Serge Rielau
DB2解决方案开发
IBM多伦多实验室
Are your batches finite? You could create a sequence/batch and write a
function doing dynamic SQL to use the appropriate sequence.
Otherwise you could use thr ROW_NUMBER() OVER(PARTITION BY
<batchcolumn>) OLAP function possibly offset by the max number for the
batch before the insert.
Cheers
Serge
--
Serge Rielau
DB2 Solutions Development
IBM Toronto Lab
批次是否会删除项目？如果是，他们是否需要重新订购？
您可能需要一个功能来为您重新排序所有内容。如果
序列中的间隙无关紧要，可以使用SEQEUNCE。
B.
Will the batches ever have items removed? If they are, will they need
reordering?
You may need a FUNCTION to reorder everything for you. If gaps in the
sequence to not matter, a SEQEUNCE can be used.
B.
嗨Serge，
不，我的批次是无限的。我创建了一个序列但它只是
即使在有一个新批次之后也会增加序列号。
请指教。
Jignesh
Hi Serge,
Nopes, my batch are infinite. I created a sequence but it just
increments the sequence number even after a having a new batch.
Please advise.
Jignesh
你的批次是否有限？你可以创建一个序列/批处理并编写一个执行动态SQL的函数来使用适当的序列。
否则你可以使用thr ROW_NUMBER（）OVER（PARTITION BY
< batchcolumn>）OLAP函数可能会在插入之前被
批次的最大数量所抵消。
Serge
-
Serge Rielau
DB2解决方案开发
IBM多伦多实验室
Are your batches finite? You could create a sequence/batch and write a
function doing dynamic SQL to use the appropriate sequence.
Otherwise you could use thr ROW_NUMBER() OVER(PARTITION BY
<batchcolumn>) OLAP function possibly offset by the max number for the
batch before the insert.
Cheers
Serge
--
Serge Rielau
DB2 Solutions Development
IBM Toronto Lab
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