最近本人整理了一些Oracle sql,现分享给大家,后续还会更新.如果有错误的地方,请指正,共同学习.贴上去的sql都是我测试过的,大家可以粘贴在自己的电脑上试试. 1.查询部门的名称,及最低收入雇员姓名,要进行表关联 select e.deptno,min(e.sal) from emp e group by e.deptno; select ee.ename, d.dname,ee.sal from emp ee ,dept d where ee.deptno = d.deptno and
题目描述 查找排除当前最大.最小salary之后的员工的平均工资avg_salary.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`));输出格式: avg_salary 69462.5555555556 SQL: sele
题目描述 统计出当前各个title类型对应的员工当前薪水对应的平均工资.结果给出title以及平均工资avg.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`));CREATE TABLE IF NOT EXISTS "titl
--根据每个部门来统计部门工资总和 select deptid, sum(sal) 工资合计 from emp group by deptid; --根据每个部门来统计部门工资总和select deptid, 工资合计, sum(工资合计) over() as 总合计 from (select deptid, sum(sal) 工资合计 from emp group by deptid) x; select deptid 部门, 工资合计, 总
drop table #Area; CREATE TABLE #Area ( id INT NOT NULL, city_name NVARCHAR(100) NOT NULL, parent_id INT NOT NULL ) INSERT INTo #Area(id,city_name,parent_id) VALUES(1,'江苏省',0) INSERT INTo #Area(id,city_name,parent_id) VALUES(2,'常州市',1) INSERT INTo #Ar
), Salary int, DepartmentId int) )) Truncate table Employee ') ') ') ') Truncate table Department ', 'IT') ', 'Sales') ---第一种 SELECT D.Name AS Department ,E.Name AS Employee ,E.Salary FROM Employee E, (SELECT DepartmentId,max(Salary) as max FROM Empl
#进阶8 分页查询 /* 应用场景: 当要显示的数据,一页显示不全,需要分页提交sql请求 语法: select 查询列表 #7 from 表1 #执行顺序:#1 [join type join 表2 #2 on 连接条件 #3 where 筛选条件 #4 group by 分组字段 #5 having 分组后筛选或函数 #6 order by 排序的字段 #8 ] limit offset, size ; #9 #offset 要显示条目的起始索引(从0开始,0想可以省略),size 要显示的
#1.查询工资最低的员工信息:last name, salary SELECT last_name, salary FROM employees WHERE salary = ( SELECT MIN(salary) FROM employees ); #2.查询平均工资最低的部门信息 SELECT * FROM departments WHERE department_id = ( SELECT department_id FROM employees GROUP BY department_
