lookup-loop.amp

%%[ var @rows, @row, @rowCount, @subKey, @counter, @orderItem 

set @subKey = _subscriberkey 
set @rows = LookupRows("Orders","CustomerId", @subKey) 
set @rowCount = rowcount(@rows) 

for @counter = 1 to @rowCount do /* repeat in a loop for as many times as defined in rowCount */ 
set @row = row(@rows, @counter) /* get row based on counter */ 
set @orderItem = field(@row,"OrderItem") 
]%%

<br>
Order item %%=v(@counter)=%%: %%=v(@orderItem)=%%<br>

%%[ next ]%%