select
  s_acctbal,
  s_name,
  n_name,
  p_partkey,
  p_mfgr,
  s_address,
  s_phone,
  s_comment
from
  part,
  supplier,
  partsupp,
  nation,
  region
where
  p_partkey = ps_partkey
  and s_suppkey = ps_suppkey
  and p_size = 15
  and p_type like '%BRASS'
  and s_nationkey = n_nationkey
  and n_regionkey = r_regionkey
  and r_name = 'EUROPE'
  and ps_supplycost = (
    select
      min(ps_supplycost)
    from
      partsupp,
      supplier,
      nation,
      region
    where
      p_partkey = ps_partkey
      and s_suppkey = ps_suppkey
      and s_nationkey = n_nationkey
      and n_regionkey = r_regionkey
      and r_name = 'EUROPE'
  )
order by
  s_acctbal desc,
  n_name,
  s_name,
  p_partkey
limit 10;

select
  s_acctbal,
  s_name,
  n_name,
  p_partkey,
  p_mfgr,
  s_address,
  s_phone,
  s_comment
from
  part,
  supplier,
  partsupp,
  nation,
  region
where
  p_partkey = ps_partkey
  and s_suppkey = ps_suppkey
  and p_size = 15
  and p_type like '%BRASS'
  and s_nationkey = n_nationkey
  and n_regionkey = r_regionkey
  and r_name = 'EUROPE'
  and ps_supplycost = (
    select
      min(ps_supplycost)
    from
      partsupp,
      supplier,
      nation,
      region
    where
      p_partkey = ps_partkey
      and s_suppkey = ps_suppkey
      and s_nationkey = n_nationkey
      and n_regionkey = r_regionkey
      and r_name = 'EUROPE'
  )
order by
  s_acctbal desc,
  n_name,
  s_name,
  p_partkey
limit 100;

-- demo2
select
  s_acctbal,
  s_name,
  n_name,
  p_partkey,
  p_mfgr,
  s_address,
  s_phone,
  s_comment
from
  part,
  supplier,
  partsupp,
  nation,
  region
where
  p_partkey = ps_partkey
  and s_suppkey = ps_suppkey
  and p_size = 2
  and p_type like '%STEEL'
  and s_nationkey = n_nationkey
  and n_regionkey = r_regionkey
  and r_name = 'AMERICA'
  and ps_supplycost = (
    select
      min(ps_supplycost)
    from
      partsupp,
      supplier,
      nation,
      region
    where
      p_partkey = ps_partkey
      and s_suppkey = ps_suppkey
      and s_nationkey = n_nationkey
      and n_regionkey = r_regionkey
      and r_name = 'AMERICA'
  )
order by
  s_acctbal desc,
  n_name,
  s_name,
  p_partkey
limit 100;

-- demo3
select
  s_acctbal,
  s_name,
  n_name,
  p_partkey,
  p_mfgr,
  s_address,
  s_phone,
  s_comment
from
  part,
  supplier,
  partsupp,
  nation,
  region
where
  p_partkey = ps_partkey
  and s_suppkey = ps_suppkey
  and p_size = 16
  and p_type like '%COPPER'
  and s_nationkey = n_nationkey
  and n_regionkey = r_regionkey
  and r_name = 'MIDDLE EAST'
  and ps_supplycost = (
    select
      min(ps_supplycost)
    from
      partsupp,
      supplier,
      nation,
      region
    where
      p_partkey = ps_partkey
      and s_suppkey = ps_suppkey
      and s_nationkey = n_nationkey
      and n_regionkey = r_regionkey
      and r_name = 'MIDDLE EAST'
  )
order by
  s_acctbal desc,
  n_name,
  s_name,
  p_partkey
limit 10;

select
  o_orderpriority,
  count(*) as order_count
from
  orders
where
  o_orderdate >= date '1993-07-01'
  and o_orderdate < date '1993-07-01' + interval '3' month
  and exists (
    select
      *
    from
      lineitem
    where
      l_orderkey = o_orderkey
      and l_commitdate < l_receiptdate
  )
group by
  o_orderpriority
order by
  o_orderpriority
limit 10;

select
  o_orderpriority,
  count(*) as order_count
from
  orders
where
  o_orderdate >= date '1993-07-01'
  and o_orderdate < date '1993-07-01' + interval '3' month
  and exists (
    select
      *
    from
      lineitem
    where
      l_orderkey = o_orderkey
      and l_commitdate < l_receiptdate
  )
group by
  o_orderpriority
order by
  o_orderpriority
limit 100;

-- demo2
select
  o_orderpriority,
  count(*) as order_count
from
  orders
where
  o_orderdate >= date '1996-10-01'
  and o_orderdate < date '1996-10-01' + interval '3' month
  and exists (
    select
      *
    from
      lineitem
    where
      l_orderkey = o_orderkey
      and l_commitdate < l_receiptdate
  )
group by
  o_orderpriority
order by
  o_orderpriority
limit 100;

-- demo3
select
  o_orderpriority,
  count(*) as order_count
from
  orders
where
  o_orderdate >= date '1997-09-01'
  and o_orderdate < date '1997-09-01' + interval '3' month
  and exists (
    select
      *
    from
      lineitem
    where
      l_orderkey = o_orderkey
      and l_commitdate < l_receiptdate
  )
group by
  o_orderpriority
order by
  o_orderpriority
limit 100;

select
  p_brand,
  p_type,
  p_size,
  count(distinct ps_suppkey) as supplier_cnt
from
  partsupp,
  part
where
  p_partkey = ps_partkey
  and p_brand <> 'Brand#45'
  and p_type not like 'MEDIUM POLISHED%'
  and p_size in (49, 14, 23, 45, 19, 3, 36, 9)
  and ps_suppkey not in (
    select
      s_suppkey
    from
      supplier
    where
      s_comment like '%Customer%Complaints%'
  )
group by
  p_brand,
  p_type,
  p_size
order by
  supplier_cnt desc,
  p_brand,
  p_type,
  p_size
limit 10;

select
  p_brand,
  p_type,
  p_size,
  count(distinct ps_suppkey) as supplier_cnt
from
  partsupp,
  part
where
  p_partkey = ps_partkey
  and p_brand <> 'Brand#45'
  and p_type not like 'MEDIUM POLISHED%'
  and p_size in (49, 14, 23, 45, 19, 3, 36, 9)
  and ps_suppkey not in (
    select
      s_suppkey
    from
      supplier
    where
      s_comment like '%Customer%Complaints%'
  )
group by
  p_brand,
  p_type,
  p_size
order by
  supplier_cnt desc,
  p_brand,
  p_type,
  p_size;

-- demo2
select
  p_brand,
  p_type,
  p_size,
  count(distinct ps_suppkey) as supplier_cnt
from
  partsupp,
  part
where
  p_partkey = ps_partkey
  and p_brand <> 'Brand#32'
  and p_type not like 'PROMO POLISHED%'
  and p_size in (27, 25, 46, 12, 20, 4, 42, 44)
  and ps_suppkey not in (
    select
      s_suppkey
    from
      supplier
    where
      s_comment like '%Customer%Complaints%'
  )
group by
  p_brand,
  p_type,
  p_size
order by
  supplier_cnt desc,
  p_brand,
  p_type,
  p_size;

-- demo3
select
  p_brand,
  p_type,
  p_size,
  count(distinct ps_suppkey) as supplier_cnt
from
  partsupp,
  part
where
  p_partkey = ps_partkey
  and p_brand <> 'Brand#42'
  and p_type not like 'SMALL PLATED%'
  and p_size in (47, 50, 4, 38, 1, 15, 2, 24)
  and ps_suppkey not in (
    select
      s_suppkey
    from
      supplier
    where
      s_comment like '%Customer%Complaints%'
  )
group by
  p_brand,
  p_type,
  p_size
order by
  supplier_cnt desc,
  p_brand,
  p_type,
  p_size;

select
  sum(l_extendedprice) / 7.0 as avg_yearly
from
  lineitem,
  part
where
  p_partkey = l_partkey
  and p_brand = 'Brand#23'
  and p_container = 'MED BOX'
  and l_quantity < (
    select
      0.2 * avg(l_quantity)
    from
      lineitem
    where
      l_partkey = p_partkey
  );

select
  sum(l_extendedprice) / 7.0 as avg_yearly
from
  lineitem,
  part
where
  p_partkey = l_partkey
  and p_brand = 'Brand#23'
  and p_container = 'MED BOX'
  and l_quantity < (
    select
      0.2 * avg(l_quantity)
    from
      lineitem
    where
      l_partkey = p_partkey
  );

-- demo2
select
  sum(l_extendedprice) / 7.0 as avg_yearly
from
  lineitem,
  part
where
  p_partkey = l_partkey
  and p_brand = 'Brand#25'
  and p_container = 'MED PACK'
  and l_quantity < (
    select
      0.2 * avg(l_quantity)
    from
      lineitem
    where
      l_partkey = p_partkey
  );

-- demo3
select
  sum(l_extendedprice) / 7.0 as avg_yearly
from
  lineitem,
  part
where
  p_partkey = l_partkey
  and p_brand = 'Brand#22'
  and p_container = 'WRAP PACK'
  and l_quantity < (
    select
      0.2 * avg(l_quantity)
    from
      lineitem
    where
      l_partkey = p_partkey
  );

select
  c_name,
  c_custkey,
  o_orderkey,
  o_orderdate,
  o_totalprice,
  sum(l_quantity)
from
  customer,
  orders,
  lineitem
where
  o_orderkey in (
    select
      l_orderkey
    from
      lineitem
    group by
      l_orderkey having
        sum(l_quantity) > 300
  )
  and c_custkey = o_custkey
  and o_orderkey = l_orderkey
group by
  c_name,
  c_custkey,
  o_orderkey,
  o_orderdate,
  o_totalprice
order by
  o_totalprice desc,
  o_orderdate
limit 10;

select
  s_name,
  s_address
from
  supplier,
  nation
where
  s_suppkey in (
    select
      ps_suppkey
    from
      partsupp
    where
      ps_partkey in (
        select
          p_partkey
        from
          part
        where
          p_name like 'black%'
      )
      and ps_availqty > (
        select
          0.5 * sum(l_quantity)
        from
          lineitem
        where
          l_partkey = ps_partkey
          and l_suppkey = ps_suppkey
          and l_shipdate >= date '1994-01-01'
          and l_shipdate < date '1994-01-01' + interval '1' year
      )
  )
  and s_nationkey = n_nationkey
  and n_name = 'MOROCCO'
order by
  s_name;

select
  s_name,
  count(*) as numwait
from
  supplier,
  lineitem l1,
  orders,
  nation
where
  s_suppkey = l1.l_suppkey
  and o_orderkey = l1.l_orderkey
  and o_orderstatus = 'F'
  and l1.l_receiptdate > l1.l_commitdate
  and exists (
    select
      *
    from
      lineitem l2
    where
      l2.l_orderkey = l1.l_orderkey
      and l2.l_suppkey <> l1.l_suppkey
  )
  and not exists (
    select
      *
    from
      lineitem l3
    where
      l3.l_orderkey = l1.l_orderkey
      and l3.l_suppkey <> l1.l_suppkey
      and l3.l_receiptdate > l3.l_commitdate
  )
  and s_nationkey = n_nationkey
  and n_name = 'ETHIOPIA'
group by
  s_name
order by
  numwait desc,
  s_name
limit 10;

select
  cntrycode,
  count(*) as numcust,
  sum(c_acctbal) as totacctbal
from
  (
    select
      substr(c_phone ,1 ,2) as cntrycode,
      c_acctbal
    from
      customer
    where
      substr(c_phone ,1 ,2) in
        ('25', '20', '18', '19', '29', '16', '22')
      and c_acctbal > (
        select
          avg(c_acctbal)
        from
          customer
        where
          c_acctbal > 0.00
          and substr(c_phone ,1 ,2) in
            ('25', '20', '18', '19', '29', '16', '22')
      )
      and not exists (
        select
          *
        from
          orders
        where
          o_custkey = c_custkey
      )
  ) custsale
group by
  cntrycode
order by
  cntrycode;