本文以一個簡單的樣本,為您介紹使用Hologres查詢外部表格和內部表中資料的基本步驟,協助您直觀體驗Hologres查詢資料效能。
前提條件
已購買並開通Hologres執行個體,開通方法請參見購買Hologres。
如果您使用RAM使用者進行操作,需具備相關操作許可權,授權方法請參見RAM使用者權限授權快速入門。
背景資訊
Hologres在查詢資料方面具有極速響應的優勢。本樣本說明如何建立Hologres的資料庫、外部表格、內部表以及如何匯入資料至內部表中,使用Hologres分別查詢內部表和外部表格中的資料,協助您快速體驗Hologres查詢資料的效能。
操作流程
通過Hologres快速建立資料庫,用於後續存放執行個體資料進行查詢使用。
在已建立的資料庫中,建立表用於儲存樣本資料。表分為外部表格和內部表:
外部表格指在Hologres中不儲存資料,只進列欄位映射的表。
內部表指資料存放區在Hologres中的表。
本樣本為您提供TPC-H標準資料集資料,您可以通過Hologres將資料匯入表中,用於後續查詢使用。
本樣本為您提供了22條標準的TPC-H測試查詢SQL語句,協助您快速體驗在Hologres中查詢資料的時效性和穩定性。
步驟一:建立資料庫
登入Hologres管理主控台,單擊左側執行個體列表。
在執行個體列表頁面,單擊對應執行個體名稱。
在執行個體詳情頁左側導覽列,單擊資料庫管理。
在DB授權頁面,單擊右上方新增資料庫。
在新增資料庫對話方塊,配置如下參數。
參數
說明
執行個體名
選擇在哪個Hologres執行個體上建立資料庫。預設展示當前已登入執行個體的名稱,您也可以在下拉框中選擇其他Hologres執行個體。
資料庫名稱
本樣本資料庫名稱為tpch_10g。
說明配置的資料庫名稱必須唯一。
簡單權限原則
您可以為建立的資料庫選擇一種權限原則。更多關於權限原則的說明,請參見:
SPM:簡單許可權模型,該許可權模型授權是以DB為粒度,劃分admin(管理員)、developer(開發人員)、writer(讀寫者)以及viewer(分析師)四種角色,您可以通過少量的許可權管理函數,即可對DB中的對象進行方便且安全的許可權管理。
SLPM:基於Schema層級的簡單許可權模型,該許可權模型以Schema為粒度,劃分 <db>.admin(DB管理員)、<db>.<schema>.developer(開發人員)、<db>.<schema>.writer(讀寫者)以及 <db>.<schema>.viewer(分析師),相比於簡單許可權模型更為細粒度。
專家許可權模型:Hologres相容PostgreSQL,使用與Postgres完全一致的許可權系統。
步驟二:建立表
資料庫建立成功後,您需在資料庫中建立對應的表。建立表時,根據您資料存放的位置不同,分為建立外部表格和內部表。
建立外部表格
登入資料庫
在HoloWeb開發頁面,單擊中繼資料管理。
在中繼資料管理頁面,雙擊左側分類樹中已建立成功的資料庫名稱,單擊確認。
建立外部表格
在SQL編輯器頁面,單擊左上方的表徵圖。
在新增的臨時Query查詢頁面,選擇已建立的執行個體名和資料庫後,請您在SQL查詢的編輯框輸入如下語句,單擊運行。
以下SQL語句用來建立一個映射到MaxCompute公用空間MAXCOMPUTE_PUBLIC_DATA中odps_customer_10g、odps_lineitem_10g等表的外部表格,用於後續查詢。
DROP FOREIGN TABLE IF EXISTS odps_customer_10g; DROP FOREIGN TABLE IF EXISTS odps_lineitem_10g; DROP FOREIGN TABLE IF EXISTS odps_nation_10g; DROP FOREIGN TABLE IF EXISTS odps_orders_10g; DROP FOREIGN TABLE IF EXISTS odps_part_10g; DROP FOREIGN TABLE IF EXISTS odps_partsupp_10g; DROP FOREIGN TABLE IF EXISTS odps_region_10g; DROP FOREIGN TABLE IF EXISTS odps_supplier_10g; IMPORT FOREIGN SCHEMA "MAXCOMPUTE_PUBLIC_DATA#default" LIMIT to ( odps_customer_10g, odps_lineitem_10g, odps_nation_10g, odps_orders_10g, odps_part_10g, odps_partsupp_10g, odps_region_10g, odps_supplier_10g ) FROM SERVER odps_server INTO public OPTIONS(if_table_exist'error',if_unsupported_type'error');
建立內部表
登入資料庫
在HoloWeb開發頁面,單擊中繼資料管理。
在中繼資料管理頁面,雙擊左側分類樹中已建立成功的資料庫名稱,單擊確認。
建立內部表
在SQL編輯器頁面,單擊左上方的建立SQL視窗。
在新增的臨時Query查詢頁面,選擇已建立的執行個體名和資料庫後,請您在SQL查詢的編輯框輸入如下語句,單擊運行。
以下SQL語句用來建立名稱分別為LINEITEM、ORDERS、PARTSUPP、PART、CUSTOMER、SUPPLIER、NATION和REGION的表,用於後續儲存資料。
DROP TABLE IF EXISTS LINEITEM; BEGIN; CREATE TABLE LINEITEM ( L_ORDERKEY bigint NOT NULL, L_PARTKEY int NOT NULL, L_SUPPKEY int NOT NULL, L_LINENUMBER int NOT NULL, L_QUANTITY DECIMAL(15, 2) NOT NULL, L_EXTENDEDPRICE DECIMAL(15, 2) NOT NULL, L_DISCOUNT DECIMAL(15, 2) NOT NULL, L_TAX DECIMAL(15, 2) NOT NULL, L_RETURNFLAG text NOT NULL, L_LINESTATUS text NOT NULL, L_SHIPDATE date NOT NULL, L_COMMITDATE date NOT NULL, L_RECEIPTDATE date NOT NULL, L_SHIPINSTRUCT text NOT NULL, L_SHIPMODE text NOT NULL, L_COMMENT text NOT NULL, PRIMARY KEY (L_ORDERKEY, L_LINENUMBER) ); CALL set_table_property ('LINEITEM', 'clustering_key', 'L_SHIPDATE,L_ORDERKEY'); CALL set_table_property ('LINEITEM', 'segment_key', 'L_SHIPDATE'); CALL set_table_property ('LINEITEM', 'distribution_key', 'L_ORDERKEY'); CALL set_table_property ('LINEITEM', 'bitmap_columns', 'L_RETURNFLAG,L_LINESTATUS,L_SHIPINSTRUCT,L_SHIPMODE'); CALL set_table_property ('LINEITEM', 'dictionary_encoding_columns', 'l_comment:off,l_returnflag,l_linestatus,l_shipinstruct,l_shipmode'); COMMIT; DROP TABLE IF EXISTS ORDERS; BEGIN; CREATE TABLE ORDERS ( O_ORDERKEY bigint NOT NULL PRIMARY KEY, O_CUSTKEY int NOT NULL, O_ORDERSTATUS text NOT NULL, O_TOTALPRICE DECIMAL(15, 2) NOT NULL, O_ORDERDATE date NOT NULL, O_ORDERPRIORITY text NOT NULL, O_CLERK text NOT NULL, O_SHIPPRIORITY int NOT NULL, O_COMMENT text NOT NULL ); CALL set_table_property ('ORDERS', 'segment_key', 'O_ORDERDATE'); CALL set_table_property ('ORDERS', 'colocate_with', 'lineitem'); CALL set_table_property ('ORDERS', 'distribution_key', 'O_ORDERKEY'); CALL set_table_property ('ORDERS', 'bitmap_columns', 'O_ORDERSTATUS,O_ORDERPRIORITY,O_CLERK,O_SHIPPRIORITY'); CALL set_table_property ('ORDERS', 'dictionary_encoding_columns', 'o_comment:off,o_orderstatus,o_orderpriority,o_clerk'); COMMIT; DROP TABLE IF EXISTS PARTSUPP; BEGIN; CREATE TABLE PARTSUPP ( PS_PARTKEY int NOT NULL, PS_SUPPKEY int NOT NULL, PS_AVAILQTY int NOT NULL, PS_SUPPLYCOST DECIMAL(15, 2) NOT NULL, PS_COMMENT text NOT NULL, PRIMARY KEY (PS_PARTKEY, PS_SUPPKEY) ); CALL set_table_property ('PARTSUPP', 'distribution_key', 'PS_PARTKEY'); CALL set_table_property ('PARTSUPP', 'colocate_with', 'lineitem'); CALL set_table_property ('PARTSUPP', 'bitmap_columns', 'ps_availqty'); CALL set_table_property ('PARTSUPP', 'dictionary_encoding_columns', ''); COMMIT; DROP TABLE IF EXISTS PART; BEGIN; CREATE TABLE PART ( P_PARTKEY int NOT NULL PRIMARY KEY, P_NAME text NOT NULL, P_MFGR text NOT NULL, P_BRAND text NOT NULL, P_TYPE text NOT NULL, P_SIZE int NOT NULL, P_CONTAINER text NOT NULL, P_RETAILPRICE DECIMAL(15, 2) NOT NULL, P_COMMENT text NOT NULL ); CALL set_table_property ('PART', 'distribution_key', 'P_PARTKEY'); CALL set_table_property ('PART', 'colocate_with', 'lineitem'); CALL set_table_property ('PART', 'bitmap_columns', 'P_SIZE,P_MFGR,P_BRAND,P_TYPE,P_CONTAINER'); CALL set_table_property ('PART', 'dictionary_encoding_columns', 'p_name:off,p_comment:off,p_mfgr,p_brand,p_type,p_container'); COMMIT; DROP TABLE IF EXISTS CUSTOMER; BEGIN; CREATE TABLE CUSTOMER ( C_CUSTKEY int NOT NULL PRIMARY KEY, C_NAME text NOT NULL, C_ADDRESS text NOT NULL, C_NATIONKEY int NOT NULL, C_PHONE text NOT NULL, C_ACCTBAL DECIMAL(15, 2) NOT NULL, C_MKTSEGMENT text NOT NULL, C_COMMENT text NOT NULL ); CALL set_table_property ('CUSTOMER', 'distribution_key', 'C_CUSTKEY'); CALL set_table_property ('CUSTOMER', 'colocate_with', 'lineitem'); CALL set_table_property ('CUSTOMER', 'bitmap_columns', 'C_NATIONKEY,C_MKTSEGMENT'); CALL set_table_property ('CUSTOMER', 'dictionary_encoding_columns', 'c_name:off,c_address:off,c_phone:off,c_comment:off,c_mktsegment'); COMMIT; DROP TABLE IF EXISTS SUPPLIER; BEGIN; CREATE TABLE SUPPLIER ( S_SUPPKEY int NOT NULL PRIMARY KEY, S_NAME text NOT NULL, S_ADDRESS text NOT NULL, S_NATIONKEY int NOT NULL, S_PHONE text NOT NULL, S_ACCTBAL DECIMAL(15, 2) NOT NULL, S_COMMENT text NOT NULL ); CALL set_table_property ('SUPPLIER', 'distribution_key', 'S_SUPPKEY'); CALL set_table_property ('SUPPLIER', 'colocate_with', 'lineitem'); CALL set_table_property ('SUPPLIER', 'bitmap_columns', 'S_NATIONKEY'); CALL set_table_property ('SUPPLIER', 'dictionary_encoding_columns', ''); COMMIT; DROP TABLE IF EXISTS NATION; BEGIN; CREATE TABLE NATION ( N_NATIONKEY int NOT NULL PRIMARY KEY, N_NAME text NOT NULL, N_REGIONKEY int NOT NULL, N_COMMENT text NOT NULL ); CALL set_table_property ('NATION', 'distribution_key', 'N_NATIONKEY'); CALL set_table_property ('NATION', 'colocate_with', 'lineitem'); CALL set_table_property ('NATION', 'bitmap_columns', ''); CALL set_table_property ('NATION', 'dictionary_encoding_columns', ''); COMMIT; DROP TABLE IF EXISTS REGION; BEGIN; CREATE TABLE REGION ( R_REGIONKEY int NOT NULL PRIMARY KEY, R_NAME text NOT NULL, R_COMMENT text ); CALL set_table_property ('REGION', 'distribution_key', 'R_REGIONKEY'); CALL set_table_property ('REGION', 'colocate_with', 'lineitem'); CALL set_table_property ('REGION', 'bitmap_columns', ''); CALL set_table_property ('REGION', 'dictionary_encoding_columns', ''); COMMIT;
步驟三:匯入樣本資料
內部表建立成功後,可以通過以下步驟將資料匯入Hologres內部表中。
外部表格在Hologres中不儲存資料,只進列欄位映射。通過外部表格您可以使用Hologres直接調用儲存於MaxCompute公用空間MAXCOMPUTE_PUBLIC_DATA的資料。
在SQL編輯器頁面,單擊左上方的建立SQL視窗。
在新增的臨時Query查詢頁面,選擇已建立的執行個體名和資料庫後,請您在SQL查詢的編輯框輸入如下語句,單擊運行。
以下SQL語句將MaxCompute公用空間MAXCOMPUTE_PUBLIC_DATA中public.odps_customer_10g、public.odps_lineitem_10g等表中資料匯入到對應名稱的內部表中,用於後續查詢。
INSERT INTO public.customer SELECT * FROM public.odps_customer_10g ; INSERT INTO public.lineitem SELECT * FROM public.odps_lineitem_10g ; INSERT INTO public.nation SELECT * FROM public.odps_nation_10g ; INSERT INTO public.orders SELECT * FROM public.odps_orders_10g ; INSERT INTO public.part SELECT * FROM public.odps_part_10g ; INSERT INTO public.partsupp SELECT * FROM public.odps_partsupp_10g ; INSERT INTO public.region SELECT * FROM public.odps_region_10g ; INSERT INTO public.supplier SELECT * FROM public.odps_supplier_10g ; vacuum nation; vacuum region; vacuum supplier; vacuum customer; vacuum part; vacuum partsupp; vacuum orders; vacuum lineitem; analyze nation; analyze region; analyze lineitem; analyze orders; analyze customer; analyze part; analyze partsupp; analyze supplier; analyze lineitem (l_orderkey,l_partkey,l_suppkey); analyze orders (o_custkey); analyze partsupp(ps_partkey,ps_suppkey);
步驟四:查詢表中資料
在SQL編輯器頁面,單擊左上方的建立SQL視窗。
在新增的臨時Query查詢頁面,選擇已建立的執行個體名和資料庫後,請您在SQL查詢的編輯框輸入如下語句,單擊運行。
說明下述SQL代碼均為查詢內部表資料使用,如需查詢外部表格,請將對應代碼查詢的表名更換為外部表格名。
基於TPC-H演化的22條查詢語句如下所示,您可以單擊表格中的連結進行查看。
名稱
查詢語句
TPC-H 22條查詢語句
-
-
Q1
select l_returnflag, l_linestatus, sum(l_quantity) as sum_qty, sum(l_extendedprice) as sum_base_price, sum(l_extendedprice * (1 - l_discount)) as sum_disc_price, sum(l_extendedprice * (1 - l_discount) * (1 + l_tax)) as sum_charge, avg(l_quantity) as avg_qty, avg(l_extendedprice) as avg_price, avg(l_discount) as avg_disc, count(*) as count_order from lineitem where l_shipdate <= date '1998-12-01' - interval '120' day group by l_returnflag, l_linestatus order by l_returnflag, l_linestatus;
Q2
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 = 48 and p_type like '%STEEL' 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;
Q3
select l_orderkey, sum(l_extendedprice * (1 - l_discount)) as revenue, o_orderdate, o_shippriority from customer, orders, lineitem where c_mktsegment = 'MACHINERY' and c_custkey = o_custkey and l_orderkey = o_orderkey and o_orderdate < date '1995-03-23' and l_shipdate > date '1995-03-23' group by l_orderkey, o_orderdate, o_shippriority order by revenue desc, o_orderdate limit 10;
Q4
select o_orderpriority, count(*) as order_count from orders where o_orderdate >= date '1996-07-01' and o_orderdate < date '1996-07-01' + 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;
Q5
select n_name, sum(l_extendedprice * (1 - l_discount)) as revenue from customer, orders, lineitem, supplier, nation, region where c_custkey = o_custkey and l_orderkey = o_orderkey and l_suppkey = s_suppkey and c_nationkey = s_nationkey and s_nationkey = n_nationkey and n_regionkey = r_regionkey and r_name = 'EUROPE' and o_orderdate >= date '1996-01-01' and o_orderdate < date '1996-01-01' + interval '1' year group by n_name order by revenue desc;
Q6
select sum(l_extendedprice * l_discount) as revenue from lineitem where l_shipdate >= date '1996-01-01' and l_shipdate < date '1996-01-01' + interval '1' year and l_discount between 0.02 - 0.01 and 0.02 + 0.01 and l_quantity < 24;
Q7
set hg_experimental_enable_double_equivalent=on; select supp_nation, cust_nation, l_year, sum(volume) as revenue from ( select n1.n_name as supp_nation, n2.n_name as cust_nation, extract(year from l_shipdate) as l_year, l_extendedprice * (1 - l_discount) as volume from supplier, lineitem, orders, customer, nation n1, nation n2 where s_suppkey = l_suppkey and o_orderkey = l_orderkey and c_custkey = o_custkey and s_nationkey = n1.n_nationkey and c_nationkey = n2.n_nationkey and ( (n1.n_name = 'CANADA' and n2.n_name = 'BRAZIL') or (n1.n_name = 'BRAZIL' and n2.n_name = 'CANADA') ) and l_shipdate between date '1995-01-01' and date '1996-12-31' ) as shipping group by supp_nation, cust_nation, l_year order by supp_nation, cust_nation, l_year;
Q8
set hg_experimental_enable_double_equivalent=on; select o_year, sum(case when nation = 'BRAZIL' then volume else 0 end) / sum(volume) as mkt_share from ( select extract(year from o_orderdate) as o_year, l_extendedprice * (1 - l_discount) as volume, n2.n_name as nation from part, supplier, lineitem, orders, customer, nation n1, nation n2, region where p_partkey = l_partkey and s_suppkey = l_suppkey and l_orderkey = o_orderkey and o_custkey = c_custkey and c_nationkey = n1.n_nationkey and n1.n_regionkey = r_regionkey and r_name = 'AMERICA' and s_nationkey = n2.n_nationkey and o_orderdate between date '1995-01-01' and date '1996-12-31' and p_type = 'LARGE ANODIZED COPPER' ) as all_nations group by o_year order by o_year;
Q9
set hg_experimental_enable_double_equivalent=on; select nation, o_year, sum(amount) as sum_profit from ( select n_name as nation, extract(year from o_orderdate) as o_year, l_extendedprice * (1 - l_discount) - ps_supplycost * l_quantity as amount from part, supplier, lineitem, partsupp, orders, nation where s_suppkey = l_suppkey and ps_suppkey = l_suppkey and ps_partkey = l_partkey and p_partkey = l_partkey and o_orderkey = l_orderkey and s_nationkey = n_nationkey and p_name like '%maroon%' ) as profit group by nation, o_year order by nation, o_year desc;
Q10
select c_custkey, c_name, sum(l_extendedprice * (1 - l_discount)) as revenue, c_acctbal, n_name, c_address, c_phone, c_comment from customer, orders, lineitem, nation where c_custkey = o_custkey and l_orderkey = o_orderkey and o_orderdate >= date '1993-02-01' and o_orderdate < date '1993-02-01' + interval '3' month and l_returnflag = 'R' and c_nationkey = n_nationkey group by c_custkey, c_name, c_acctbal, c_phone, n_name, c_address, c_comment order by revenue desc limit 20;
Q11
select ps_partkey, sum(ps_supplycost * ps_availqty) as value from partsupp, supplier, nation where ps_suppkey = s_suppkey and s_nationkey = n_nationkey and n_name = 'EGYPT' group by ps_partkey having sum(ps_supplycost * ps_availqty) > ( select sum(ps_supplycost * ps_availqty) * 0.0001000000 from partsupp, supplier, nation where ps_suppkey = s_suppkey and s_nationkey = n_nationkey and n_name = 'EGYPT' ) order by value desc;
Q12
select l_shipmode, sum(case when o_orderpriority = '1-URGENT' or o_orderpriority = '2-HIGH' then 1 else 0 end) as high_line_count, sum(case when o_orderpriority <> '1-URGENT' and o_orderpriority <> '2-HIGH' then 1 else 0 end) as low_line_count from orders, lineitem where o_orderkey = l_orderkey and l_shipmode in ('FOB', 'AIR') and l_commitdate < l_receiptdate and l_shipdate < l_commitdate and l_receiptdate >= date '1997-01-01' and l_receiptdate < date '1997-01-01' + interval '1' year group by l_shipmode order by l_shipmode;
Q13
select c_count, count(*) as custdist from ( select c_custkey, count(o_orderkey) as c_count from customer left outer join orders on c_custkey = o_custkey and o_comment not like '%special%deposits%' group by c_custkey ) c_orders group by c_count order by custdist desc, c_count desc;
Q14
select 100.00 * sum(case when p_type like 'PROMO%' then l_extendedprice * (1 - l_discount) else 0 end) / sum(l_extendedprice * (1 - l_discount)) as promo_revenue from lineitem, part where l_partkey = p_partkey and l_shipdate >= date '1997-06-01' and l_shipdate < date '1997-06-01' + interval '1' month;
Q15
with revenue0(SUPPLIER_NO, TOTAL_REVENUE) as ( select l_suppkey, sum(l_extendedprice * (1 - l_discount)) from lineitem where l_shipdate >= date '1995-02-01' and l_shipdate < date '1995-02-01' + interval '3' month group by l_suppkey ) select s_suppkey, s_name, s_address, s_phone, total_revenue from supplier, revenue0 where s_suppkey = supplier_no and total_revenue = ( select max(total_revenue) from revenue0 ) order by s_suppkey;
Q16
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 'SMALL ANODIZED%' and p_size in (47, 15, 37, 30, 46, 16, 18, 6) 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;
Q17
select sum(l_extendedprice) / 7.0 as avg_yearly from lineitem, part where p_partkey = l_partkey and p_brand = 'Brand#51' and p_container = 'WRAP PACK' and l_quantity < ( select 0.2 * avg(l_quantity) from lineitem where l_partkey = p_partkey );
Q18
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) > 312 ) 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 100;
Q19
select sum(l_extendedprice* (1 - l_discount)) as revenue from lineitem, part where ( p_partkey = l_partkey and p_brand = 'Brand#52' and p_container in ('SM CASE', 'SM BOX', 'SM PACK', 'SM PKG') and l_quantity >= 3 and l_quantity <= 3 + 10 and p_size between 1 and 5 and l_shipmode in ('AIR', 'AIR REG') and l_shipinstruct = 'DELIVER IN PERSON' ) or ( p_partkey = l_partkey and p_brand = 'Brand#43' and p_container in ('MED BAG', 'MED BOX', 'MED PKG', 'MED PACK') and l_quantity >= 12 and l_quantity <= 12 + 10 and p_size between 1 and 10 and l_shipmode in ('AIR', 'AIR REG') and l_shipinstruct = 'DELIVER IN PERSON' ) or ( p_partkey = l_partkey and p_brand = 'Brand#52' and p_container in ('LG CASE', 'LG BOX', 'LG PACK', 'LG PKG') and l_quantity >= 21 and l_quantity <= 21 + 10 and p_size between 1 and 15 and l_shipmode in ('AIR', 'AIR REG') and l_shipinstruct = 'DELIVER IN PERSON' );
Q20
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 'drab%' ) 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 '1996-01-01' and l_shipdate < date '1996-01-01' + interval '1' year ) ) and s_nationkey = n_nationkey and n_name = 'KENYA' order by s_name;
Q21
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 = 'PERU' group by s_name order by numwait desc, s_name limit 100;
Q22
select cntrycode, count(*) as numcust, sum(c_acctbal) as totacctbal from ( select substring(c_phone from 1 for 2) as cntrycode, c_acctbal from customer where substring(c_phone from 1 for 2) in ('24', '32', '17', '18', '12', '14', '22') and c_acctbal > ( select avg(c_acctbal) from customer where c_acctbal > 0.00 and substring(c_phone from 1 for 2) in ('24', '32', '17', '18', '12', '14', '22') ) and not exists ( select * from orders where o_custkey = c_custkey ) ) as custsale group by cntrycode order by cntrycode;