How to handle when select single is not allowed in loop

What happens when select single is not allowed in the LOOP
Examples: Materials are available at a variety of prices and have expiry dates

    this part of the first I contact processing, was conducted in DSO itself in a transformation:
    first result_package according to the actual delivery date to heavy, and then for the first and the last one, make sure the date range of package
    based on the above date range to need to get the data in the table
    then LOOP itself, try to reduce data after
    LOOP itself, split the date range a a

    This approach requires setting up semantic groups
    Note: this article is my daily record of learning, do not carry out any commercial so do not support reprint please understand

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