Add 实验八

实验八

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+create database cs;
+
+use cs;
+
+create table ygxx(    #员工信息表
+Ygbh char(8) not null primary key,   #员工编号
+Name varchar(8) not null,     #姓名
+Sex Char(2) not null,     #性别
+Zw varchar(10) not null,   #职务
+Kl varchar(20) not null,    #口令
+Qxjb char(1) not null,     #权限级别
+Sfzh Char(18),   #身份证号
+ssbmbh char(4)   #所属部门编号
+)engine = InnoDB default charset=utf8;
+
+
+create table bmxx(
+bmbh char(8) NOT NULL primary key,
+bmmc varchar(4) not null
+)engine=InnoDB default charset=utf8;
+
+create table spxx(
+Spbh char(8) not null primary key,
+Spmc varchar(20) not null,
+Sslb char(8) not null,
+Jg FLOAT(10,2) not null,
+sl int(4) not null
+)engine=InnoDB default charset=utf8;
+
+create table supplier(
+Gysbh Char(8) not null primary key,
+Gysmc varchar(8) not null,
+Dz varchar(20) not null,
+Yzbm char(6) not null,
+Dhhm varchar(15) not null,
+Sh varchar(3) not null,
+Yhzh varchar(20) not null,
+Khyh varchar(8) not null,
+Lxr varchar(8) not null,
+beizhu varchar(16)
+)engine=InnoDB default charset=utf8;
+
+SET SQL_SAFE_UPDATES = 0;
+
+
+#添加数据
+insert into ygxx(Ygbh,Name,Sex,Zw,Kl,QXjb,ssbmbh)values('10000001','张利','男','主管','123','5','1001');
+insert into ygxx(Ygbh,Name,Sex,Zw,Kl,QXjb,ssbmbh)values('10000002','刘程','男','副主管','123','4','1002');
+insert into ygxx values('10000003','张三','男','员工','12','1',null,'1003'),
+					   ('10000004','李四','男','员工','12','1',null,'1004');
+insert into bmxx values('1001','业务'),('1002','技术'),('1003','售后'),('1004','管理');
+insert into spxx values('10000001','空调','电器','1500','10'),('10000002','书包','文具','100','20'),
+					   ('10000003','卷纸','日用品','30','50'),('10000004','铅笔','文具','10','100'),
+                       ('10000005','橡皮','文具','5','1000'),('10000006','风扇','电器','1000','10'),
+                       ('10000007','水杯','日用品','20','100'),('10000008','牙刷','日用品','20','100');
+
+create table spsupp
+(ssbh char(4) primary key,           # 供应商品编号
+spbh char(8) not null,               # 商品编号
+gysbh char(80) not null,            # 供应商编号
+price float,                       # 供应价格
+sl int,                           #供应数量
+sj datetime );                     #供应时间
+insert into supplier values
+('10000001','格力公司','佛山','528200','07576326535','dw','330625325','工商银行','jary',null), ('10000002','美的公司','佛山','528201','07576326536','dt','330625326','工商银行','jarat',null),
+('10000003','宝洁公司','广州','520660','0206326538','dp','330625328','工商银行','teey',null);
+
+insert into spsupp values
+('1001','10000001','10000001',2500,300,'2020-10-1'),
+('1002','10000001','10000002',2380,500,'2020-10-2'),
+('1003','10000003','10000003',30,1500,'2020-10-3');
+
+select * from bmxx;
+select * from spxx;
+select * from supplier;
+select * from ygxx;
+select * from spsupp;
+
+#1
+select Ygbh,Name,Zw,Qxjb from Ygxx where ssbmbh=(select bmbh from bmxx where bmmc='业务');
+
+#2
+select Gysbh,Gysmc,Dz,Dhhm from supplier where Gysbh=(select Spbh from spxx where Spmc='空调');
+
+#3
+select spxx.spmc,spxx.sslb,supplier.gysmc from (spsupp inner join spxx on spsupp.spbh=spxx.spbh) inner join supplier on spsupp.gysbh=supplier.gysbh 
+where spsupp.sj>='2020-10-01 00:00:00' and spsupp.sj<'2020-10-03 00:00:00';
+
+#4