>Hi All,
>
>I have a problem to order a set of data.
>
>I have a given set of data.
>Initialy it is ordered by a logic over some columns. (Like SELECT * FROM myTable Order 2,4,6)
>
>My customer need to change this order later by either:
>-moving the position of record(s)
>-insert a record(s) between given records (or on top / bottom)
>
>My basic idea was to store the order in a separate, nonvisible field.
>
>The UI works on a view on a multiuser database.
>
>My problem is:
>
>Since I have never done a multiline TABLEUPDATE, I would prefer to change only the moved record.
>
>If I move are insert a record, there must be a gap between two records.
>
>If I initaly store order as 1,2,3,... I have to come between the values.
>
>In case 1,2 are numerical I can put something at 1.5. but if I have later to put something between 1 and 1.5 I will go to 1.25. This way seems to be limited because every new division by 2 will give me a new decimal place.
>
>
>I'm not happy with this.
>
>My question is:
>Is there a common way to solve problems like this?
>
>Would it be easier to renumber the whole view and TABLEUPDATE it (and also handle conflicts) than to build up a logic to calculate a number the fits between two given numbers?
>
>If calculation is easier is there a good way to calculate?
>
>
>TIA
>
>Agnes

Agnes,

Never done it.

If I were you I would add an Integer field

Start numbering from a power of 2 (eg 2^10), and increment by it

Insert = eg (1024 + 2048)/2

index on bintoc() (Collating sequence = 'Machine')

if the order is changed, update the underlying table, renumbering and incrementing by 2^10

You may choose that the user changes the order by entering a value