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Insert Query in between rows - SQL [message #630834]

Mon, 05 January 2015 11:25

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Guys can any one help me with below query where i need to insert two records by shifting the sequence number two ahead where sequence is having unique constraint,
For e.g. my table has records
xyz 1
zz 2
aa 3
bb 4
cc 5
I need to insert two records in between 3rd and 4th sequence

xyz 1
zz 2
aa 3
new 4
new_1 5
bb 6
cc 7

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Re: Insert Query in between rows - SQL [message #630835 is a reply to message #630834]

Mon, 05 January 2015 11:37

Michel Cadot
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1/ Update the rows you want/have to shift
2/ Insert the new rows.

Please read OraFAQ Forum Guide and How to use [code] tags and make your code easier to read.

[Updated on: Mon, 05 January 2015 11:37]

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Re: Insert Query in between rows - SQL [message #630837 is a reply to message #630835]

Mon, 05 January 2015 11:38

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Yeah thats what i did is it way to achieve in single query i some what tried with merge statement but not able to get the query

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Re: Insert Query in between rows - SQL [message #630838 is a reply to message #630837]

Mon, 05 January 2015 11:50

BlackSwan
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Registered: January 2009
Location: SoCal

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Did you read in the Posting Guidelines where we don't do homework assignments?

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Re: Insert Query in between rows - SQL [message #630840 is a reply to message #630837]

Mon, 05 January 2015 11:56

Michel Cadot
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It may be possible but we have to check so you have to post a working Test case: create table and insert statements along with the result you want with these data then we will work with your table and data.

Please read the links I posted.

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Re: Insert Query in between rows - SQL [message #630842 is a reply to message #630840]

Mon, 05 January 2015 12:09

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Please find my table created, kindly ignore the data which i posted in original post

create table T(name, seq unique) as  
select chr(ascii('a')+level-1) name, level seq
from dual  
connect by level <= 5;

I need to insert a record between 3rd and 4th sequence

output

a	1
b	2
c	3
y	4
z	5
d	6
e	7

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Re: Insert Query in between rows - SQL [message #630844 is a reply to message #630842]

Mon, 05 January 2015 12:18

BlackSwan
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Registered: January 2009
Location: SoCal

Senior Member

explain how/why INSERT changes values in existing rows.

rows in a table are like balls in a basket.
There is no inherent row order in a heap table.

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Re: Insert Query in between rows - SQL [message #630846 is a reply to message #630844]

Mon, 05 January 2015 12:22

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Hi

Since I am inserting two records in between the sequence the existing sequence will be update which would shift two sequences ahead

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Re: Insert Query in between rows - SQL [message #630847 is a reply to message #630842]

Mon, 05 January 2015 12:23

John Watson
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Registered: January 2010
Location: Global Village

Senior Member

I looks as though you have to insert two rows and update two other rows. But which rows? I think you need to explain further what the rules for this operation are. For example, is either the column NAME or the column SEQ a primary key that can never be updated? If you can answer that question, then it will become clear which rows should be inserted and which rows should be updated.

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Re: Insert Query in between rows - SQL [message #630849 is a reply to message #630834]

Mon, 05 January 2015 12:28

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Hi

I would be updating the sequence which is primary key column and insert two records with new name And obviously the sequence numbers which will be update the exiting sequence in order to shift the existing name and sequence two sequences ahead. So ideally it's inserting Two records with name and sequence in between two records

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Re: Insert Query in between rows - SQL [message #630850 is a reply to message #630842]

Mon, 05 January 2015 12:29

Michel Cadot
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It is not possible to do it with merge.

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Re: Insert Query in between rows - SQL [message #630851 is a reply to message #630849]

Mon, 05 January 2015 12:30

BlackSwan
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>I would be updating the sequence which is primary key column

What happens when FK exists which depends upon PK?

This whole problem is ameteurish & boderline nonsensical.

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Re: Insert Query in between rows - SQL [message #630852 is a reply to message #630849]

Mon, 05 January 2015 12:31

Michel Cadot
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Quote:

I would be updating the sequence which is primary key column

You never update a primary key otherwise it is not a primary key.
And this is for this reason than you cannot do it with MERGE.

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Re: Insert Query in between rows - SQL [message #630853 is a reply to message #630851]

Mon, 05 January 2015 12:31

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

There is no foreign key

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Re: Insert Query in between rows - SQL [message #630855 is a reply to message #630853]

Mon, 05 January 2015 12:34

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Any other away a part from merge and moreoevr I don't wanted to disable the constraint. I can achieve this by normal insert and update statements . Is there any other way

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Re: Insert Query in between rows - SQL [message #630856 is a reply to message #630855]

Mon, 05 January 2015 12:38

Michel Cadot
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No.
Of course this can't be a real case.
As I said, in real world, you do not, you MUST not update a primary key.
If you do this in an application the design of this one is definitely flawed and BIG problems will come sooner or later.

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Re: Insert Query in between rows - SQL [message #630857 is a reply to message #630856]

Mon, 05 January 2015 12:40

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Ok what if I disable the key I mean if there Is a unique key on that column

[Updated on: Mon, 05 January 2015 12:42]

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Re: Insert Query in between rows - SQL [message #630858 is a reply to message #630857]

Mon, 05 January 2015 12:45

Michel Cadot
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Not more, the priblem is not in the existence of the PK in the database.
The primary key exists at MODEL level first, then you (and Oracle) implement it.
You cannot update it at MODEL, design level, then at implementation one. But at implementation level you can always do anything, you can delete your data , you can drop the database.

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Re: Insert Query in between rows - SQL [message #630859 is a reply to message #630858]

Mon, 05 January 2015 12:47

rohit_shinez
Messages: 139
Registered: January 2015

Senior Member

Yes of course it's the implementation level only where this table act as a temporary table

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Re: Insert Query in between rows - SQL [message #630860 is a reply to message #630859]

Mon, 05 January 2015 12:51

Michel Cadot
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Post the complete description of your actual issue otherwise the answer is move the data into another temporary table.
Note that temporary tables are mostly not used in Oracle world and mainly misused.

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Re: Insert Query in between rows - SQL [message #630862 is a reply to message #630853]

Mon, 05 January 2015 14:21

EdStevens
Messages: 1377
Registered: September 2013

Senior Member

rohit_shinez wrote on Mon, 05 January 2015 12:31

There is no foreign key

Not today anyway.
What about that requirement the application architect is going to walk in tomorrow morning?

Like others have said, if that value is part of your primary key, then you have poorly chosen a primary key.

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