SELECTMAX( salary ) SecondHighestSalaryFROMEmployeeWHEREsalary<(SELECTMAX( salary )FROMEmployee ) 为什么这个代码可以应对只有一行的情况呢?让我们一起看一下MAX函数的定义 MAX函数返回expr列的最大值,此外,除了作用于数值型的列,还可以作用于字符串类型的列。当MAX函数应用于字符串类型的列时,它会返回具有最大...
解决方案:SELECTproduct_id,MAX(IF(store='store1', price,null))ASstore1,MAX(IF(store='store2', price,null))ASstore2,MAX(IF(store='store3', price,null))ASstore3, 来自产品GROUPBYproduct_id; 1757. 可回收和低脂产品[文档] 解决方案: 从产品中选择 product_id,其中 low_fats ='Y'ANDrecycla...
where hire_date = (select max(hire_date) from employees); 1. 2. 3. 4. 5. 6. 7. 推荐优先使用子查询,因为如果最大的同时有N个,子查询可以全部查询到,但排序只能排一个 口试: 如果我只需要知道该字段的最值的具体value,那我直接select max from table即可,当然order by XX desc 接limit 0,1也...
selectFirstName,LastName,City,StatefromPersonpleftjoinAddressaonp.PersonId=a.PersonId; 176.第二高薪水 编写一个 SQL 查询,获取Employee表中第二高的薪水(Salary) 。 例如上述Employee表,SQL查询应该返回200作为第二高的薪水。如果不存在第二高的薪水,那么查询应返回null。 select max(Salary) as SecondHighes...
SELECT max( Salary ) AS SecondHighestSalary FROM Employee WHERE Salary < ( SELECT max( Salary ) FROM Employee ); 5,min函数 返回查询到的数据的最⼩值,不是数字没有意义 – 返回 > 60 分以上的数学最低分 SELECT MIN(math) FROM exam_result WHERE math > 60; ...
编写一个SQL查询,找出每个部门工资最高的员工。例如,根据上述给定的表格,Max在IT部门有最高工资,Henry 在 Sales 部门有最高工资。 正确答案: select d.Name as Department, e.Name as Employee, Salary from Employee e inner join Department d on e.DepartmentId = d.Id ...
-＞ SELECT monthname(payment_date) payment_month, -＞ sum(amount) month_total, -＞ CASE sum(amount) -＞ WHEN max(sum(amount)) over () THEN 'Highest' -＞ WHEN min(sum(amount)) over () THEN 'Lowest' -＞ ELSE 'Middle' -＞ END descriptor -＞...
Employee |+---+| Joe |+---+解释: Joe 是唯一挣得比经理多的雇员。2.2解题sam是joe的领导，max 是henry的领导。一表多用，解法如下：SELECT a.name as "Employee"FROMEmployee as a,Employee as bWHERE(a. managerId=b.IdAND a.salary>b.salary);执行：3分数排名3.1题目描述表: ...
SELECTIFNULL((SELECT DISTINCT SalaryFROM EmployeeORDER BY Salary DESCLIMIT 1 OFFSET 1), null) as SecondHighestSalaryFROM EmployeeLIMIT 1 1. 2)解决方案B:使用MAX() 此查询表示选择的MAX薪水不等于最高薪水,这等于选择第二高的薪水。 SELECT MAX(salary) AS SecondHighestSalaryFROM EmployeeWHERE salary !
Select a product SQL Server Syntax Arguments Show 9 more Backs up a SQL database. Select a product In the following row, select the product name you're interested in, and only that product's information is displayed. For more information about the syntax conventions, see Transact-SQL ...