Q13
select
	c_count,
	count(*) as custdist
from
	(
		select
			c_custkey,
			count(o_orderkey)
		from
			customer left outer join orders on
				c_custkey = o_custkey
				and o_comment not like '%:1%:2%'
		group by
			c_custkey
	) as c_orders (c_custkey, c_count)
group by
	c_count
order by
	custdist desc,
	c_count desc;
	
Oracle Execution Plan	

Operation: table access
Options: FULL
Object_type: TABLE
Other: 
Object_owner: CALUSER01
Search_columns: 
Projection: C_CUSTKEY
Object_name: CUSTOMER
Alias: CUSTOMER@SEL$3
Extended_information: 
Access_predicates: 
Filter_predicates: 
Select_level: SEL$54D64B3C
--------------------
Operation: table access
Options: FULL
Object_type: TABLE
Other: 
Object_owner: CALUSER01
Search_columns: 
Projection: ORDERS.O_ORDERKEY^O_CUSTKEY
Object_name: ORDERS
Alias: ORDERS@SEL$2
Extended_information:    FP:O_COMMENT(+) NOT LIKE '%:1%:2%'
Access_predicates: 
Filter_predicates: O_COMMENT(+) NOT LIKE '%:1%:2%'
Select_level: SEL$54D64B3C
--------------------
Operation: hash join
Options: OUTER
Object_type: 
Other: 
Object_owner: 
Search_columns: 
Projection:  C_CUSTKEY^ORDERS.O_ORDERKEY
Object_name: 
Alias: 
Extended_information:    AP:C_CUSTKEY=O_CUSTKEY(+)
Access_predicates: C_CUSTKEY=O_CUSTKEY(+)
Filter_predicates: 
Select_level: 
--------------------
Operation: hash
Options: GROUP BY
Object_type: 
Other: 
Object_owner: 
Search_columns: 
Projection:  CUSTOMER.C_CUSTKEY^COUNT(ORDERS.O_ORDERKEY)
Object_name: 
Alias: 
Extended_information: 
Access_predicates: 
Filter_predicates: 
Select_level: SEL$54D64B3C
--------------------
Operation: view
Options: 
Object_type: 
Other: 
Object_owner: CALUSER01
Search_columns: 
Projection: C_COUNT
Object_name: 
Alias: C_ORDERS@SEL$1
Extended_information: 
Access_predicates: 
Filter_predicates: 
Select_level: SEL$54D64B3C
--------------------
Operation: hash
Options: GROUP BY
Object_type: 
Other: 
Object_owner: 
Search_columns: 
Projection:  C_COUNT^COUNT(ALL)
Object_name: 
Alias: 
Extended_information: 
Access_predicates: 
Filter_predicates: 
Select_level: 
--------------------
Operation: sort
Options: ORDER BY
Object_type: 
Other: 
Object_owner: 
Search_columns: 
Projection:  COUNT(ALL)^INTERNAL_FUNCTION(C_COUNT)
Object_name: 
Alias: 
Extended_information: 
Access_predicates: 
Filter_predicates: 
Select_level: SEL$1
--------------------
Operation: select statement
Options: 
Object_type: 
Other: 
Object_owner: 
Search_columns: 
Projection: 
Object_name: 
Alias: 
Extended_information: 
Access_predicates: 
Filter_predicates: 
Select_level: 
--------------------
