MySQL基础练习---牛客网的数据以及典型题目

1 部门表departments

部门no和部门名称

2 部门员工表 dept_emp

每个部门对应的员工信息

3 部门经理表 dept_manager

每个部门的经理信息

4 员工表 employees

员工的具体信息

5 薪水表 salaries

所有员工的薪水

6 职称表 titles

所有员工的职称

MySQL代码

CREATE DATABASE /*!32312 IF NOT EXISTS*/`sqlpractice_nk` /*!40100 DEFAULT CHARACTER SET utf8 */;
 
USE `sqlpractice_nk`;
 
/*Table structure for table `departments` */
 
DROP TABLE IF EXISTS `departments`;
 
CREATE TABLE `departments` (
  `dept_no` char(4) NOT NULL,
  `dept_name` varchar(40) NOT NULL,
  PRIMARY KEY (`dept_no`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
/*Data for the table `departments` */
 
insert  into `departments`(`dept_no`,`dept_name`) values ('d001','Marketing'),('d002','Finance'),('d003','Human Resources'),('d004','Production'),('d005','Development'),('d006','Quality Management');
 
/*Table structure for table `dept_emp` */
 
DROP TABLE IF EXISTS `dept_emp`;
 
CREATE TABLE `dept_emp` (
  `emp_no` int(11) NOT NULL,
  `dept_no` char(4) NOT NULL,
  `from_date` date NOT NULL,
  `to_date` date NOT NULL,
  PRIMARY KEY (`emp_no`,`dept_no`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
/*Data for the table `dept_emp` */
 
insert  into `dept_emp`(`emp_no`,`dept_no`,`from_date`,`to_date`) values (10001,'d001','1986-06-26','9999-01-01'),(10002,'d001','1996-08-03','9999-01-01'),(10003,'d004','1995-12-03','9999-01-01'),(10004,'d004','1986-12-01','9999-01-01'),(10005,'d003','1989-09-12','9999-01-01'),(10006,'d002','1990-08-05','9999-01-01'),(10007,'d005','1989-02-10','9999-01-01'),(10008,'d005','1998-03-11','2000-07-31'),(10009,'d006','1985-02-18','9999-01-01'),(10010,'d005','1996-11-24','2000-06-26'),(10010,'d006','2000-06-26','9999-01-01');
 
/*Table structure for table `dept_manager` */
 
DROP TABLE IF EXISTS `dept_manager`;
 
CREATE TABLE `dept_manager` (
  `dept_no` char(4) NOT NULL,
  `emp_no` int(11) NOT NULL,
  `from_date` date NOT NULL,
  `to_date` date NOT NULL,
  PRIMARY KEY (`emp_no`,`dept_no`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
/*Data for the table `dept_manager` */
 
insert  into `dept_manager`(`dept_no`,`emp_no`,`from_date`,`to_date`) values ('d001',10002,'1996-08-03','9999-01-01'),('d004',10004,'1986-12-01','9999-01-01'),('d003',10005,'1989-09-12','9999-01-01'),('d002',10006,'1990-08-05','9999-01-01'),('d005',10010,'1996-11-24','2000-06-26'),('d006',10010,'2000-06-26','9999-01-01');
 
/*Table structure for table `employees` */
 
DROP TABLE IF EXISTS `employees`;
 
CREATE TABLE `employees` (
  `emp_no` int(11) NOT NULL,
  `birth_date` date NOT NULL,
  `first_name` varchar(14) NOT NULL,
  `last_name` varchar(16) NOT NULL,
  `gender` char(1) NOT NULL,
  `hire_date` date NOT NULL,
  PRIMARY KEY (`emp_no`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
/*Data for the table `employees` */
 
insert  into `employees`(`emp_no`,`birth_date`,`first_name`,`last_name`,`gender`,`hire_date`) values (10001,'1953-09-02','Georgi','Facello','M','1986-06-26'),(10002,'1964-06-02','Bezalel','Simmel','F','1985-11-21'),(10003,'1959-12-03','Parto','Bamford','M','1986-08-28'),(10004,'1954-05-01','Chirstian','Koblick','M','1986-12-01'),(10005,'1955-01-21','Kyoichi','Maliniak','M','1989-09-12'),(10006,'1953-04-20','Anneke','Preusig','F','1989-06-02'),(10007,'1957-05-23','Tzvetan','Zielinski','F','1989-02-10'),(10008,'1958-02-19','Saniya','Kalloufi','M','1994-09-15'),(10009,'1952-04-19','Sumant','Peac','F','1985-02-18'),(10010,'1963-06-01','Duangkaew','Piveteau','F','1989-08-24'),(10011,'1953-11-07','Mary','Sluis','F','1990-01-22');
 
/*Table structure for table `salaries` */
 
DROP TABLE IF EXISTS `salaries`;
 
CREATE TABLE `salaries` (
  `emp_no` int(11) NOT NULL,
  `salary` int(11) NOT NULL,
  `from_date` date NOT NULL,
  `to_date` date NOT NULL,
  PRIMARY KEY (`emp_no`,`from_date`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
/*Data for the table `salaries` */
 
insert  into `salaries`(`emp_no`,`salary`,`from_date`,`to_date`) values (10001,60117,'1986-06-26','1987-06-26'),(10001,62102,'1987-06-26','1988-06-25'),(10001,66074,'1988-06-25','1989-06-25'),(10001,66596,'1989-06-25','1990-06-25'),(10001,66961,'1990-06-25','1991-06-25'),(10001,71046,'1991-06-25','1992-06-24'),(10001,74333,'1992-06-24','1993-06-24'),(10001,75286,'1993-06-24','1994-06-24'),(10001,75994,'1994-06-24','1995-06-24'),(10001,76884,'1995-06-24','1996-06-23'),(10001,80013,'1996-06-23','1997-06-23'),(10001,81025,'1997-06-23','1998-06-23'),(10001,81097,'1998-06-23','1999-06-23'),(10001,84917,'1999-06-23','2000-06-22'),(10001,85112,'2000-06-22','2001-06-22'),(10001,85097,'2001-06-22','2002-06-22'),(10001,88958,'2002-06-22','9999-01-01'),(10002,72527,'1996-08-03','1997-08-03'),(10002,72527,'1997-08-03','1998-08-03'),(10002,72527,'1998-08-03','1999-08-03'),(10002,72527,'1999-08-03','2000-08-02'),(10002,72527,'2000-08-02','2001-08-02'),(10002,72527,'2001-08-02','9999-01-01'),(10003,40006,'1995-12-03','1996-12-02'),(10003,43616,'1996-12-02','1997-12-02'),(10003,43466,'1997-12-02','1998-12-02'),(10003,43636,'1998-12-02','1999-12-02'),(10003,43478,'1999-12-02','2000-12-01'),(10003,43699,'2000-12-01','2001-12-01'),(10003,43311,'2001-12-01','9999-01-01'),(10004,40054,'1986-12-01','1987-12-01'),(10004,42283,'1987-12-01','1988-11-30'),(10004,42542,'1988-11-30','1989-11-30'),(10004,46065,'1989-11-30','1990-11-30'),(10004,48271,'1990-11-30','1991-11-30'),(10004,50594,'1991-11-30','1992-11-29'),(10004,52119,'1992-11-29','1993-11-29'),(10004,58326,'1994-11-29','1995-11-29'),(10004,60770,'1995-11-29','1996-11-28'),(10004,62566,'1996-11-28','1997-11-28'),(10004,64340,'1997-11-28','1998-11-28'),(10004,67096,'1998-11-28','1999-11-28'),(10004,69722,'1999-11-28','2000-11-27'),(10004,70698,'2000-11-27','2001-11-27'),(10004,74057,'2001-11-27','9999-01-01'),(10005,78228,'1989-09-12','1990-09-12'),(10005,82621,'1990-09-12','1991-09-12'),(10005,83735,'1991-09-12','1992-09-11'),(10005,85572,'1992-09-11','1993-09-11'),(10005,85076,'1993-09-11','1994-09-11'),(10005,86050,'1994-09-11','1995-09-11'),(10005,88448,'1995-09-11','1996-09-10'),(10005,89724,'1997-09-10','1998-09-10'),(10005,90392,'1998-09-10','1999-09-10'),(10005,90531,'1999-09-10','2000-09-09'),(10005,91453,'2000-09-09','2001-09-09'),(10005,94692,'2001-09-09','9999-01-01'),(10006,43311,'1990-08-05','1991-08-05'),(10006,43311,'1991-08-05','1992-08-04'),(10006,43311,'1992-08-04','1993-08-04'),(10006,43311,'1993-08-04','1994-08-04'),(10006,43311,'1994-08-04','1995-08-04'),(10006,43311,'1995-08-04','1996-08-03'),(10006,43311,'1996-08-03','1997-08-03'),(10006,43311,'1997-08-03','1998-08-03'),(10006,43311,'1998-08-03','1999-08-03'),(10006,43311,'1999-08-03','2000-08-02'),(10006,43311,'2000-08-02','2001-08-02'),(10006,43311,'2001-08-02','9999-01-01'),(10007,56724,'1989-02-10','1990-02-10'),(10007,60740,'1990-02-10','1991-02-10'),(10007,62745,'1991-02-10','1992-02-10'),(10007,63475,'1992-02-10','1993-02-09'),(10007,63208,'1993-02-09','1994-02-09'),(10007,64563,'1994-02-09','1995-02-09'),(10007,68833,'1995-02-09','1996-02-09'),(10007,70220,'1996-02-09','1997-02-08'),(10007,73362,'1997-02-08','1998-02-08'),(10007,75582,'1998-02-08','1999-02-08'),(10007,79513,'1999-02-08','2000-02-08'),(10007,80083,'2000-02-08','2001-02-07'),(10007,84456,'2001-02-07','2002-02-07'),(10007,88070,'2002-02-07','9999-01-01'),(10008,46671,'1998-03-11','1999-03-11'),(10008,48584,'1999-03-11','2000-03-10'),(10008,52668,'2000-03-10','2000-07-31'),(10009,60929,'1985-02-18','1986-02-18'),(10009,64604,'1986-02-18','1987-02-18'),(10009,64780,'1987-02-18','1988-02-18'),(10009,66302,'1988-02-18','1989-02-17'),(10009,69042,'1989-02-17','1990-02-17'),(10009,70889,'1990-02-17','1991-02-17'),(10009,71434,'1991-02-17','1992-02-17'),(10009,74612,'1992-02-17','1993-02-16'),(10009,76518,'1993-02-16','1994-02-16'),(10009,78335,'1994-02-16','1995-02-16'),(10009,80944,'1995-02-16','1996-02-16');
 
/*Table structure for table `titles` */
 
DROP TABLE IF EXISTS `titles`;
 
CREATE TABLE `titles` (
  `emp_no` int(11) NOT NULL,
  `title` varchar(50) NOT NULL,
  `from_date` date NOT NULL,
  `to_date` date NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 
/*Data for the table `titles` */
 
insert  into `titles`(`emp_no`,`title`,`from_date`,`to_date`) values (10001,'Senior Engineer','1986-06-26','9999-01-01'),(10002,'Staff','1996-08-03','9999-01-01'),(10003,'Senior Engineer','1995-12-03','9999-01-01'),(10004,'Engineer','1986-12-01','1995-12-01'),(10004,'Senior Engineer','1995-12-01','9999-01-01'),(10005,'Senior Staff','1996-09-12','9999-01-01'),(10005,'Staff','1989-09-12','1996-09-12'),(10006,'Senior Engineer','1990-08-05','9999-01-01'),(10007,'Senior Staff','1996-02-11','9999-01-01'),(10007,'Staff','1989-02-10','1996-02-11'),(10008,'Assistant Engineer','1998-03-11','2000-07-31'),(10009,'Assistant Engineer','1985-02-18','1990-02-18'),(10009,'Engineer','1990-02-18','1995-02-18'),(10009,'Senior Engineer','1995-02-18','9999-01-01'),(10010,'Engineer','1996-11-24','9999-01-01'),(10010,'Engineer','1996-11-24','9999-01-01');

典型题目汇总

以下题目是在第二遍做时遇到困难的：

（1）从titles表获取按照title进行分组，注意对于重复的title进行忽略

（2）查找所有员工自入职以来的薪水涨幅情况

（3）对所有员工的薪水按照salary进行按照1-N的排名

（4）获取员工其当前的薪水比其manager当前薪水还高的相关信息

（5）汇总各个部门当前员工的title类型的分配数目

（6）

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