Select all the rows that fulfill the criteria: only the first 2 occurences of a value in column B

[Cristian Tanasa]

Dear all,

Could please someone help out?
It is quite difficult to describe what I need:
Select all the rows that fulfill the criteria: only the first 2 occurences of a value in column B.
Therefore I conceived the example below:

I would need a query that would yield as results the entire rows 1, 2, 5, 6, 7.
= the query should check column B and select only 2 rows for the customer 55555. Which rows are selected is not relevant: it could be also 3 and 4.
Important is, that not more than 2 rows for each customer are selected. Some customers have only one occurence (customer 88888) - for these should be selected only this available row.

Many thanks for your help,
Cristian

Nr. Cust. OrderID ProdID Quantity
1 55555 10248 11 12
2 55555 10249 42 10
3 55555 10250 72 5
4 55555 10251 14 9
5 88888 10252 51 40
6 44444 10253 56 11
7 44444 10254 33 45
8 55555 10255 74 22