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這篇“SQL搜索前三名的方法是什么”文章的知識(shí)點(diǎn)大部分人都不太理解,所以小編給大家總結(jié)了以下內(nèi)容,內(nèi)容詳細(xì),步驟清晰,具有一定的借鑒價(jià)值,希望大家閱讀完這篇文章能有所收獲,下面我們一起來看看這篇“SQL搜索前三名的方法是什么”文章吧。
具體數(shù)據(jù)和SQL是這樣的
WITH Employee AS(
SELECT 1 Id, 'joe' Name,70000 SALARY,1 DepartmentId FROM DUAL UNION ALL
SELECT 2 Id, 'Henry' Name,80000 SALARY,2 DepartmentId FROM DUAL UNION ALL
SELECT 3 Id, 'Sam' Name,60000 SALARY,2 DepartmentId FROM DUAL UNION ALL
SELECT 4 Id, 'Max' Name,90000 SALARY,1 DepartmentId FROM DUAL UNION ALL
SELECT 5 Id, 'Janet' Name,69000 SALARY,1 DepartmentId FROM DUAL UNION ALL
SELECT 6 Id, 'Randy' Name,85000 SALARY,1 DepartmentId FROM DUAL
),
Department AS (
SELECT 1 Id, 'IT' Name FROM DUAL UNION ALL
SELECT 2 Id, 'Sales' Name FROM DUAL
)
SELECT T1.Name,T2.*
FROM
Department T1
,Employee T2
WHERE T1.Id= T2.DepartmentId
AND 3>
(
SELECT COUNT(distinct T3.SALARY) RN
FROM Employee T3
WHERE T2.DepartmentId = T3.DepartmentId
AND T2.SALARY < T3.SALARY
)
ORDER BY T2.DEPARTMENTID,T2.SALARY
以上就是關(guān)于“SQL搜索前三名的方法是什么”這篇文章的內(nèi)容,相信大家都有了一定的了解,希望小編分享的內(nèi)容對(duì)大家有幫助,若想了解更多相關(guān)的知識(shí)內(nèi)容,請(qǐng)關(guān)注億速云行業(yè)資訊頻道。
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