From 91c4cfbe2e915b6e89091ebc289f411699e9822d Mon Sep 17 00:00:00 2001
From: Harshreich <773407390@qq.com>
Date: Tue, 27 Sep 2022 22:19:26 +0800
Subject: [PATCH] .

---
 .../\344\275\234\344\270\232/22.9.27.sql"     | 44 ++++++++++++
 .../\347\254\224\350\256\260/22.9.27.md"      | 72 +++++++++++++++++++
 2 files changed, 116 insertions(+)
 create mode 100644 "10\351\231\210\346\230\212\347\253\245/\344\275\234\344\270\232/22.9.27.sql"
 create mode 100644 "10\351\231\210\346\230\212\347\253\245/\347\254\224\350\256\260/22.9.27.md"

diff --git "a/10\351\231\210\346\230\212\347\253\245/\344\275\234\344\270\232/22.9.27.sql" "b/10\351\231\210\346\230\212\347\253\245/\344\275\234\344\270\232/22.9.27.sql"
new file mode 100644
index 0000000..9d06103
--- /dev/null
+++ "b/10\351\231\210\346\230\212\347\253\245/\344\275\234\344\270\232/22.9.27.sql"
@@ -0,0 +1,44 @@
+--1）编写视图实现查询出所有银行卡账户信息，显示卡号，身份证，姓名，余额。
+go
+create view V_newab(卡号,身份证,姓名,余额)
+as
+select BankCard.CardNo,AccountInfo.AccountCode,AccountInfo.RealName,BankCard.CardMoney from BankCard left join AccountInfo on BankCard.AccountId=AccountInfo.AccountId
+go
+
+--2）行转列
+create table record (
+ name varchar(10),
+ year int ,
+ month int ,
+ amount float
+  )
+insert into record values
+(1991,1,1.1),
+(1991,2,1.2),
+(1991,3,1.3),
+(1991,4,1.4),
+(1992,1,2.1),
+(1992,2,2.2),
+(1992,3,2.3),
+(1992,4,2.4)
+select * from record
+go
+create view V_RErecord(year,m1,m2,m3,m4)
+as
+ select * from record 
+ pivot (sum(amount) for month in ([1],[2],[3],[4])) as RErecord
+ go
+ select * from V_RErecord
+ --3)列转行
+ create table sc (
+ name varchar(10),
+ english int ,
+ maths int ,
+ music int
+  )
+insert into sc values ('Jim',90,88,99)
+ select name,'english' subject,english as score from sc 
+ union
+  select name,'maths' subject,maths as score from sc 
+  union
+   select name,'music' subject,music as score from sc
\ No newline at end of file
diff --git "a/10\351\231\210\346\230\212\347\253\245/\347\254\224\350\256\260/22.9.27.md" "b/10\351\231\210\346\230\212\347\253\245/\347\254\224\350\256\260/22.9.27.md"
new file mode 100644
index 0000000..868d058
--- /dev/null
+++ "b/10\351\231\210\346\230\212\347\253\245/\347\254\224\350\256\260/22.9.27.md"
@@ -0,0 +1,72 @@
+#                                          瑙嗗浘
+
+瑙嗗浘鏃惰櫄鎷熺殑琛ㄣ�備笌鍖呭惈鏁版嵁鐨勮〃涓嶄竴鏍凤紝瑙嗗浘鍊煎寘鍚娇鐢ㄦ椂鍔ㄦ�佹绱㈡暟鎹殑鏌ヨ銆�
+
+## 1.1銆佷负浠�涔堜娇鐢ㄨ鍥�
+
+閲嶇敤SQL璇彞
+绠�鍖栧鏉傜殑SQL鎿嶄綔
+浣跨敤琛ㄧ殑涓�閮ㄥ垎鑰屼笉鏄暣涓〃
+淇濇姢鏁版嵁銆傚彲浠ユ巿鏉冪敤鎴疯闂〃鐨勭壒瀹氶儴鍒嗙殑鏉冮檺锛岃�屼笉鏄暣涓〃鐨勮闂潈闄�
+鏇存敼鏁版嵁鏍煎紡鍜岃〃绀�
+娉ㄦ剰锛�
+1銆佽鐭ラ亾瑙嗗浘浠呬粎鏃剁敤鏉ユ煡鐪嬪瓨鍌ㄥ湪鍒鏁版嵁鐨勪竴绉嶆帾鏂姐�傝鍥炬湰韬笉鍖呭惈鏁版嵁锛屽洜姝よ繑鍥炵殑鏁版嵁鏄粠鍏朵粬琛ㄤ腑妫�绱㈠嚭鏉ョ殑銆傚湪娣诲姞鎴栨洿鏀硅繖浜涜〃鐨勬暟鎹椂锛岃鍥惧皢杩斿洖鏀瑰彉杩囩殑鏁版嵁銆�
+
+1.2銆佽鍥剧殑瑙勫垯鍜岄檺鍒�
+
+鍒涘缓瑙嗗浘鍓嶏紝搴旇鐭ラ亾浠栫殑涓�浜涢檺鍒躲�備笉杩囪繖浜涢檺鍒堕殢涓嶅悓鐨凞BMS鑰屼笉鍚岋紝鍥犳鍦ㄥ垱寤鸿鍥炬椂搴旇鏌ョ湅鍏蜂綋鐨凞BMS鏂囨。銆�
+
+鍜岃〃涓�鏍凤紝瑙嗗浘蹇呴』鍞竴鍛藉悕
+瀵逛簬鍙互鍒涘缓鐨勮鍥炬暟鐩病鏈夐檺鍒�
+鍒涘缓瑙嗗浘锛屽繀椤诲叿鏈夎冻澶熺殑璁块棶鏉冮檺
+瑙嗗浘鍙互宓屽锛屽嵆鍙互鍒╃敤浠庡叾浠栬鍥句腑妫�绱㈡暟鎹殑鏌ヨ鏉ユ瀯閫犺鍥�
+璁稿DBMS绂佹鍦ㄨ鍥炬煡璇腑浣跨敤ORDER BY瀛愬彞
+鏈変簺DBMS瑕佹眰瀵硅繑鍥炵殑鎵�鏈夊垪杩涜鍛藉悕锛屽鏋滃垪鏃惰绠楀瓧娈碉紝鍒欓渶瑕佷娇鐢ㄥ埆鍚�
+瑙嗗浘涓嶈兘绱㈠紩锛屼篃涓嶈兘鏈夊叧鑱旂殑瑙﹀彂鍣ㄦ垨榛樿鍊�
+鏈変簺DBMS鎶婅鍥句綔涓哄彧璇荤殑鏌ヨ锛岃繖琛ㄧず鍙互浠庤鍥炬绱㈡暟鎹紝浣嗕笉鑳藉皢鏁版嵁鍐欏洖搴曞眰琛�
+鏈変簺DBMS鍏佽鍒涘缓杩欐牱鐨勮鍥撅紝瀹冧笉鑳借繘琛屽鑷磋涓嶅啀灞炰簬瑙嗗浘鐨勬彃鍏ュ拰鏇存柊銆�
+2.1銆佸埄鐢ㄨ鍥剧畝鍖栧鏉傜殑鑱旂粨
+
+CREATE VIEW ProductCustomers AS
+SELECT cust_name,cust_contact,prod_id
+FROM customers,orders,orderItems
+WHERE customers.cust_id=orders.cust_id
+AND orderitems.order_num=orders.order_num;
+\#鍒涘缓涓�涓悕涓篜roductCustomers鐨勮鍥�
+1
+2
+3
+4
+5
+6
+2.2銆佺敤瑙嗗浘閲嶆柊鏍煎紡鍖栨绱㈠嚭鐨勬暟鎹�
+
+CREATE VendorLoactions AS
+SELECT RTRIM(vend_name)+'('+RTTIM(vend_country)+')' AS vend_title
+FROM Vendors;
+1
+2
+3
+2.3銆佺敤瑙嗗浘杩囨护涓嶆兂瑕佺殑鏁版嵁
+
+CREATE VIEW CustomersEMailList AS
+SELECT cust_id,cust_name,cust_email
+FROM customers
+WHERE Customers
+WHERE cust_email IS NOT NULL;
+\#瀹氫箟CustomersEMailList瑙嗗浘锛岃繃婊ゆ病鏈夌數瀛愰偖浠跺湴鍧�鐨勯【瀹�
+1
+2
+3
+4
+5
+6
+2.4銆佷娇鐢ㄨ鍥惧拰璁＄畻瀛楁
+
+CREATE VIEW orderitemsexpand AS
+SELECT order_num,
+prod_id,
+quantity,
+item_price,
+quantity*item_price AS expanded_price
+FROM orderitems;
\ No newline at end of file
-- 
Gitee