SQL演習課題

1.三階松/SQL_exercises/1.製品マスタの全件.sql

+select * from M_PRODUCT;
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1.三階松/SQL_exercises/10.製品マスタで PRICE が 5,000 以上 10,000 以下のもの.sql

+--select * from M_PRODUCT;
+select * from M_PRODUCT where (5000 <= price) and (price <= 10000);
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1.三階松/SQL_exercises/11.製品マスタで PRONAME が『T』から始まるもの.sql

+--select * from M_PRODUCT;
+select * from M_PRODUCT where proname like 'T%' ;
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1.三階松/SQL_exercises/12.製品マスタで PRONAME が『T』を含むもの.sql

+--select * from M_PRODUCT;
+select * from M_PRODUCT where proname like '%T%' ;
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1.三階松/SQL_exercises/13.製品マスタで PRONAME の文字数が 8文字以上でかつ、ENABLE が True のもの.sql

+--select * from M_PRODUCT;
+select * from M_PRODUCT where (len(proname) >= 8) and (enable = 'True');
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1.三階松/SQL_exercises/14.製品マスタで PRICE と COST の差額が 1000 以上のデータの PRONAME と PRICE と COST.sql

+--select *, (price - cost) as sagaku from M_PRODUCT;
+select proname, price, cost from M_PRODUCT  where price - cost >= 1000;

1.三階松/SQL_exercises/15.製品マスタで ENABLE が True のデータを、PRICE の昇順.sql

+--select * from M_PRODUCT;
+select * from M_PRODUCT where enable = 'true' order by price;
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1.三階松/SQL_exercises/16.製品マスタで ENABLE が True のデータを、COST の降順.sql

+--select * from M_PRODUCT;
+select * from M_PRODUCT where enable = 'true' order by cost desc;
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1.三階松/SQL_exercises/17.製品マスタで ENABLE が True のデータを、PRICE の降順 かつ COST の昇順.sql

+--select * from M_PRODUCT;
+select * from M_PRODUCT where enable = 'true' order by price desc, cost asc;
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1.三階松/SQL_exercises/18.製品マスタの PRICE を重複せずに一覧表示、かつ PRICE の昇順 (表示は PRICE のみ).sql

+select * from M_PRODUCT;
+select distinct price from M_PRODUCT order by price asc;
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1.三階松/SQL_exercises/19.製品マスタの全製品の平均 RPICE.sql

+--select * from M_PRODUCT;
+select avg(price) as avg_price from M_PRODUCT;
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1.三階松/SQL_exercises/2.顧客マスタの全件.sql

+select * from M_CUSTOMER;
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1.三階松/SQL_exercises/20.製品マスタの最大と最小 COST.sql

+--select * from M_PRODUCT;
+select max(cost) as max_cost, min(cost) as min_cost from M_PRODUCT;
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1.三階松/SQL_exercises/21.顧客マスタで ADDRESS が『日本』ではないデータのデータ数.sql

+--select * from M_CUSTOMER;
+select count(address) as cnt_country_excluding_Japan from M_CUSTOMER where address != '日本'; --Nullを除外した場合
+select count(*) as cnt_country_excluding_Japan from M_CUSTOMER where (address != '日本') or (address is null); --Nullを除外した場合
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1.三階松/SQL_exercises/22.製品マスタで PRONAME の最初の 5 文字に『O』を含むデータの、PRICE の合計.sql

+--select * from M_PRODUCT;
+--select left(proname,5), price from M_PRODUCT where left(proname,5) like '%O%';
+select sum(price) sum_price from M_PRODUCT where left(proname,5) like '%O%';
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1.三階松/SQL_exercises/23.顧客マスタと従業員マスタを EMPCODE でつなげて表示(従業員マスタとつながらない顧客データは表示しない).sql

+--gp
+--select * from M_CUSTOMER order by empcode asc;
+--select * from M_EMPLOYEE order by empcode asc;
+
+select * from M_CUSTOMER inner join  M_EMPLOYEE on M_CUSTOMER.empcode = M_EMPLOYEE.empcode order by M_EMPLOYEE.empcode asc;

1.三階松/SQL_exercises/25.顧客マスタと従業員マスタを EMPCODE でつなげて表示 (従業員マスタとつながらない顧客データも表示する).sql

+--SOgp
+--select * from M_CUSTOMER order by empcode asc;
+--select * from M_EMPLOYEE order by empcode asc;
+
+select * from M_CUSTOMER full join  M_EMPLOYEE on M_CUSTOMER.empcode = M_EMPLOYEE.empcode order by M_CUSTOMER.empcode asc;

1.三階松/SQL_exercises/26.売上データと顧客マスタと従業員マスタをつなげて表示(それぞれ、つながるデータがない場合は表示しない).sql

+--内部結合を使用
+--select * from M_CUSTOMER order by empcode asc;
+--select * from M_EMPLOYEE order by empcode asc;
+--select * from T_SALE;
+
+/*
+M_CUSTOMERとM_EMPLOYEEには、empcodeが共通
+M_CUSTOMERとT_SALEには、cuscodeが共通
+M_EMPLOYEEとT_SALEには、共通する列名がない
+*/
+
+select * from M_CUSTOMER inner join  M_EMPLOYEE on M_CUSTOMER.empcode = M_EMPLOYEE.empcode inner join T_SALE on M_CUSTOMER.cuscode = T_SALE.cuscode;

1.三階松/SQL_exercises/27.2010年売上のデータを、商品マスタとつなげて表示(それぞれ、つながるデータが無い場合は表示しない).sql

+--内部結合を使用
+--select * from M_PRODUCT;
+--select * from T_SALE where saledate >= ;
+
+/*
+M_PRODUCTとT_SALEには、procodeが共通
+*/
+
+select * from T_SALE inner join  M_PRODUCT on T_SALE.procode = M_PRODUCT.procode where year(T_SALE.SALEDATE) = 2010 order by T_SALE.procode asc;

1.三階松/SQL_exercises/28.2009年度売上で、価格が 10,000 以上のもの.sql

+--左外部結合
+/*
+T_SALE内にprice(値段)のデータがないから外部から参照する必要あり
+M_PRODUCTにpriceあり、procodeが共通
+M_PRODUCT内の情報はpriceだけでよくないか？
+*/
+--select * from T_SALE order by saledate asc;
+--select * from M_PRODUCT;
+
+--select * from T_SALE where year(saledate) = 2009 order by saledate asc; --2009年のT_SALE
+--select * from T_SALE left join M_PRODUCT on T_SALE.procode = M_PRODUCT.procode where (year(saledate) = 2009) and (M_PRODUCT.price >= 10000) order by saledate asc; --2009年のT_SALEとM_PRODUCT(全体)を左外部結合
+select T_SALE.saleid, T_SALE.cuscode, T_SALE.procode, T_SALE.number,  M_PRODUCT.price, T_SALE.saledate from T_SALE left join M_PRODUCT on T_SALE.procode = M_PRODUCT.procode where (year(saledate) = 2009) and (M_PRODUCT.price >= 10000) order by saledate asc;--2009年のT_SALEにM_PRODUCTのpriceのみを結合
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