) as SecondHeighestSalary; 找第n个数: 1 2 3 4 5 6 7 8 9 10 CREATE FUNCTION getNthHighestSalary(N INT) RETURNS INT BEGIN DECLARE M INT; set N=N-1; RETURN ( # Write your MySQL query statement below. select Salary from Employee order by Salary desc limit 1 offset N ); END 1 ...
题目: 解题:题目要有思路,最先想到的是去掉最大值,读取第二最大值思路一:where语句限定salary的取值要去掉最大值,从只有第二最大值里面寻找最大值 思路二:limit offset 语句直接选取 需要注意如果原来的表…
这样做是取表中第二个数字为空时,即表中只有一个数字,或者全部数字都是一样的并列第一,无法返回空值 SELECT(SELECTDISTINCTSalaryFROMEmployeeORDERBYSalaryDESCLIMIT1OFFSET1)ASsecondHighestSalary
Below are the several ways of finding the Nth highest salary: How to find the second highest salary in SQL Server using a Sub-Query How to find the second highest salary in SQL Server using a CTE How to find the 3rd, 5th highest salary Here we will be using SQL Server 2017, or you...
In this case, the ranking of each employee is specific to each department. Now let’s extend the same query to find the employee with the second highest salary in each department from the table. select * from ( SELECT [id], [name], ...
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Use the SQL Server:Latches object and associated counters in Performance Monitor to gather information about SuperLatches, including the number of SuperLatches, SuperLatch promotions per second, and SuperLatch demotions per second. For more information about the SQL Server:Latches object and ...
A Microsoft extension to the ANSI SQL language that includes procedural programming, local variables, and various support functions. 4,706 questions 1 answer Group By and it's Highest Value using SQL Query In the table below, how do I group by Unit and then get the highest value from Quanti...
Write an SQL query to find the number of times each student attended each exam. Order the result table by student_id and subject_name. The query result format is in the following example: # Students table: +---+---+ | student_id | student_name | +---+---+ | 1 | Alice | |...
Queries that become more expensive over time due to growth of the underlying data resulting in the need to perform additional logical reads of memory-resident data. Changes in query plans resulting in suboptimal execution. If all of these conditions are true, perform further investigation into possi...