Sql 如何找到前三个工资的总和,其中表上的总行数为六行
如何找到前三个工资的总和,其中表上的总行数为六行Sql 如何找到前三个工资的总和,其中表上的总行数为六行,sql,Sql,如何找到前三个工资的总和,其中表上的总行数为六行 id Salary 01 100 02 200 03 300 04 400 05 500 06 600 你是说: SELECT SUM(Salary) FROM ( SELECT Salary FROM your_table ORDER BY id LIMIT 3 ) A 假设它是SQL Server: SELECT SUM(Salary) As Sa
id Salary
01 100
02 200
03 300
04 400
05 500
06 600
你是说:
SELECT SUM(Salary)
FROM (
SELECT Salary FROM your_table ORDER BY id LIMIT 3
) A
假设它是SQL Server:
SELECT SUM(Salary) As SalaryTotal
(
SELECT TOP 3 * FROM your_table ORDER BY ID
)
如果您希望获得最高3份工资的总和,则可以按工资排序:
SELECT SUM(Salary) As SalaryTotal
(
SELECT TOP 3 * FROM your_table ORDER BY salary DESC
)
试着用这个
SELECT SUM(salary)
FROM
(SELECT
ROW_NUMBER() OVER (ORDER BY id ASC) AS ROW_NUMBER, salary
FROM tablename) AS foo
WHERE
ROW_NUMBER <= 3