diff --git "a/05\345\215\240\345\277\227\346\226\260/9.26/.keep" "b/05\345\215\240\345\277\227\346\226\260/9.26/.keep"
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git "a/05\345\215\240\345\277\227\346\226\260/9.26/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232.sql" "b/05\345\215\240\345\277\227\346\226\260/9.26/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232.sql"
new file mode 100644
index 0000000000000000000000000000000000000000..8ce2fb50f77c0b9ac397d9820f3e0bbcee530e53
--- /dev/null
+++ "b/05\345\215\240\345\277\227\346\226\260/9.26/\347\254\254\344\270\203\346\254\241\344\275\234\344\270\232.sql"
@@ -0,0 +1,14 @@
+select * from AccountInfo
+select * from BankCard
+select * from CardExchange
+select * from CardStateChange
+select * from CardTransfer
+go
+--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。
+create view v_ac (卡号,身份证,姓名,余额)
+as
+select cardno,AccountCode,RealName,cardmoney from AccountInfo
+join BankCard on AccountInfo.AccountId=BankCard.AccountId
+go
+select * from v_ac
+--2）行转列常用做法: group by + sum(case when) /+count(case when)  数据分析+ over (paritition by, order by)
diff --git "a/05\345\215\240\345\277\227\346\226\260/9.26/\347\264\242\345\274\225\344\270\216\350\247\206\345\233\276\347\254\224\350\256\260.txt" "b/05\345\215\240\345\277\227\346\226\260/9.26/\347\264\242\345\274\225\344\270\216\350\247\206\345\233\276\347\254\224\350\256\260.txt"
new file mode 100644
index 0000000000000000000000000000000000000000..a86994706082f4abeb653cc6d2c751a3b5959f60
--- /dev/null
+++ "b/05\345\215\240\345\277\227\346\226\260/9.26/\347\264\242\345\274\225\344\270\216\350\247\206\345\233\276\347\254\224\350\256\260.txt"
@@ -0,0 +1,14 @@
+瑙嗗浘锛圴iew锛夋槸涓�绉嶈櫄鎷熷瓨鍦ㄧ殑琛紝瀵逛簬浣跨敤瑙嗗浘鐨勭敤鎴锋潵璇村熀鏈笂鏄�忔槑鐨勩�傝鍥惧苟 涓嶅湪鏁版嵁搴撲腑瀹為檯瀛樺湪锛� 琛屽拰鍒楁暟鎹潵鑷畾涔夎鍥剧殑鏌ヨ涓娇鐢ㄧ殑琛紝 骞朵笖鏄湪浣跨敤瑙嗗浘鏃� 鍔ㄦ�佺敓鎴愮殑銆� 
+瑙嗗浘鐩稿浜庢櫘閫氱殑琛ㄧ殑浼樺娍涓昏鍖呮嫭浠ヤ笅鍑犻」銆� 
+飦�  绠�鍗曪細 浣跨敤瑙嗗浘鐨勭敤鎴峰畬鍏ㄤ笉闇�瑕佸叧蹇冨悗闈㈠搴旂殑琛ㄧ殑缁撴瀯銆� 鍏宠仈鏉′欢鍜岀瓫閫夋潯浠讹紝 瀵圭敤鎴锋潵璇村凡缁忔槸杩囨护濂界殑澶嶅悎鏉′欢鐨勭粨鏋滈泦銆� 
+飦�  瀹夊叏锛� 浣跨敤瑙嗗浘鐨勭敤鎴峰彧鑳借闂粬浠鍏佽鏌ヨ鐨勭粨鏋滈泦锛� 瀵硅〃鐨勬潈闄愮鐞嗗苟涓嶈兘 闄愬埗鍒版煇涓鏌愪釜鍒楋紝浣嗘槸閫氳繃瑙嗗浘灏卞彲浠ョ畝鍗曠殑瀹炵幇銆� 
+飦�  鏁版嵁鐙珛锛氫竴鏃﹁鍥剧殑缁撴瀯纭畾浜嗭紝鍙互灞忚斀琛ㄧ粨鏋勫彉鍖栧鐢ㄦ埛鐨勫奖鍝嶏紝婧愯〃澧炲姞 鍒楀瑙嗗浘娌℃湁褰卞搷锛涙簮琛ㄤ慨鏀瑰垪鍚嶏紝鍒欏彲浠ラ�氳繃淇敼瑙嗗浘鏉ヨВ鍐筹紝涓嶄細閫犳垚瀵硅闂� 鑰呯殑褰卞搷銆�
+
+瑙嗗浘鐨勫彲鏇存柊鎬у拰瑙嗗浘涓煡璇㈢殑瀹氫箟鏈夊叧绯伙紝浠ヤ笅绫诲瀷鐨勮鍥炬槸涓嶅彲鏇存柊鐨勩�� 
+飩�  鍖呭惈浠ヤ笅鍏抽敭瀛楃殑 SQL 璇彞锛� 鑱氬悎鍑芥暟 锛圫UM銆� MIN銆� MAX銆� COUNT 绛夛級 銆� DISTINCT銆� GROUP  BY銆丠AVING銆乁NION 鎴栬�匲NION ALL銆� 
+飩�  甯搁噺瑙嗗浘銆� 
+飩�  SELECT 涓寘鍚瓙鏌ヨ銆� 
+飩�  JOIN銆� 
+飩�  FROM 涓�涓笉鑳芥洿鏂扮殑瑙嗗浘銆� 
+飩�  WHERE 瀛楀彞鐨勫瓙鏌ヨ寮曠敤浜� FROM 瀛楀彞涓殑琛ㄣ�� 
+鈥斺�斺�斺�斺�斺�斺�斺�斺�斺�斺�斺�斺�斺�斺�斺��
\ No newline at end of file