[英]Select Negation of one table from another along with data in master table sql query for oracle
[英]How to Select master table data and select referance table top one data sql query
我需要一个sql查询,它应该返回主表项和它的子表项( 仅最新的一个条目 )。 我使用了内部联接。 但我不能正常工作。 任何人都可以给我一个适当的查询
提前致谢
在SQLServer2005中使用选项和OUTER APPLY运算符
SELECT *
FROM master t1 OUTER APPLY (
SELECT TOP 1 t2.Col1, t2.Col2 ...
FROM child t2
WHERE t1.Id = t2.Id
ORDER BY t2.CreatedDate DESC
) o
带有CTE和ROW_NUMBER()排名功能的OR选项
;WITH cte AS
(
SELECT *,
ROW_NUMBER() OVER(PARTITION BY t1.Id ORDER BY t2.CreatedDate DESC) AS rn
FROM master t1 JOIN child t2 ON t1.Id = t2.Id
)
SELECT *
FROM cte
WHERE rn = 1
尝试这个,
SELECT ID, DATE
(
SELECT M.ID, C.DATE, ROW_NUMBER() OVER(PARTITION BY M.ID ORDER BY C.DATE DESC) RN
FROM MASTER M
JOIN CHILD C
ON C.ID = M.ID
) A
WHERE RN = 1
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