Question

I have to create Customer/agent relationship, in which each agent may handle 100 customers, and each customer will have order/position/priority to handle. And when i update a customer’s order/position/priority to some other priority.

For example from 5 to 25 then the position already occupied customer needs to go one step down 24 so then the 24 th to 23 it will goes upto the 6 th customer goes to 5th.

So is there anyway to have custom sql query or php script (For loop can do that, but i want something else if it is possible)) to handle this situation.

Answer 1

UPDATE yourTable SET priority = priority + 1 WHERE priority >= 24
UPDATE yourTable SET priority = 24 WHERE priority = 5
UPDATE yourTable SET priority = priority - 1 WHERE priority > 5

Preferablu it should be done within a transaction.