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Inserting  data into table

Posted on 2002-04-30
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Last Modified: 2012-05-05


We have a table in a database that maintains a list of orders.

Each order has a position in a queue.

Order position               order name

1                                   g
2                                   s
3                                   f
4                                   x
5                                   a


New orders may ‘come in’ and have to be inserted between two
excisting orders.

Eg

A new order named P with a position 3 comes in.

The current order in position 3 named f  will be pushed down to
position 4 and the existing order in position 4 will be pushed to
position 5 and so on.

So the table ends up looking like this:


Order position               order name

1                               g
2                               s
3                               P
4                               f
5                               x
6                               a


The problem is how do I renumber (increment) the OrderPosition of
existing orders  as new Orders are entered ‘above’

I am using VB DAO to connect to an ACESS database.
I don’t want to write code to go and renumber the Order Positions.
Is they a way to insert a record between two records?

Any help greatly appreciated.


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Question by:martinnetquote
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Expert Comment

by:Anthony Perkins
ID: 6982505
Please maintain your open questions:

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Thanks,
Anthony
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Expert Comment

by:crazyman
ID: 6982962
This will update everything after you new position by one

update table set position = position +1 where position > newpostion

now add your new record

insert into table (position,name) values (newposition,newname)
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Expert Comment

by:gron
ID: 6983063
Why don't you use decimals for the inserts. You will have an infinite supply of insert positions without changing the original order. So the new insert before 3 could be 2.5
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Expert Comment

by:Moondancer
ID: 7018358
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