I'm trying to create the most efficient way to allow a user to change the display order of a group of rows in a table.
Lets say the basic table is:
id group_id name sort_order
The query to display it would be
"SELECT id, name FROM mytable WHERE group_id = $x ORDER BY sort_order"
Now when I display it they currenlty all have the same sort_order value so they come in the order however the db finds them.
In my PHP app... I have a small arrow that allow them to move a row up or down changing the display order.
Currently this is done by looping through the results of all the items in a group and reassigning a new sort_order value to each one.
Meaning 1 SELECT and MANY updates (1 for each item in the group).
I was wondering if anyone has come up with a better way to do this.
Thanks, Mike
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