Question: In sql without creating new columns, and without nesting, grouping, or aggregation. users(email, name, pwd, city, gender) products(pid, descr) sales(sid, lister, pid, edate, descr, cond,

In sql without creating new columns, and without nesting, grouping, or aggregation.
users(email, name, pwd, city, gender)
products(pid, descr)
sales(sid, lister, pid, edate, descr, cond, rprice)
bids(bid, bidder, sid, bdate, amount)
items(sid, no, pid, descr)
reviews(reviewer, reviewee, rating, rtext, rdate)
previews(rid, pid, reviewer, rating, rtext, rdate)
List sid and lister of all sales that end over the next 3 days but have no bids with an amount reaching or exceeding the reserved price

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