Question

我有一张表CUST1，里面有数据。每个都有一个唯一的member_ID，如图所示。

现在还有另一个表CUST1_TREE，如图所示。

我想表明谁是孩子的父母。我希望得到的结果是新表，如图所示

我无法嵌入图片，所以请点击链接查看图片。任何有关上述的帮助将受到高度赞赏。感谢

Answer 1

下面是一个脚本，根据您的示例构建2个临时表，并按您的请求查询结果。随意提出任何问题。

编辑：我理解你的学习，而事实是我们都在学习。坚持下去！

create TABLE #CUST1
(
    MEMBER_ID INT,
    MEMBER_NAME VARCHAR(10),
    MEMBER_D VARCHAR(25)
)

CREATE TABLE #CUST1_TREE
(
    MEMBER_ID INT,
    MEMBER_PARENT_ID INT
)

INSERT INTO #CUST1
(MEMBER_ID, MEMBER_NAME, MEMBER_D)
VALUES
(10,'N1','EMIL'),
(20,'N2','MARIA'),
(30,'N3','AMIR'),
(1005,'N4','VIVI'),
(2006,'N5','RJ'),
(1007,'N6','EMIL J'),
(2095,'N7','EMILY'),
(1055,'N8','TESSAN'),
(10055,'N9','MIKE')

INSERT INTO #CUST1_TREE
(MEMBER_ID, MEMBER_PARENT_ID)
VALUES
(10, NULL),
(20, NULL),
(30, NULL),
(1005, 20),
(2006, 20),
(1007, 10),
(2095, 10),
(1055, 30),
(10055, 1055)

SELECT 
    C1.MEMBER_ID,
    C1.MEMBER_NAME,
    C1.MEMBER_D,
    CT1.MEMBER_ID,
    C2.MEMBER_NAME,
    C2.MEMBER_D,
    CT2.MEMBER_ID,
    C3.MEMBER_NAME,
    C3.MEMBER_D
FROM #CUST1 C1
    LEFT JOIN #CUST1_TREE CT1
        ON C1.MEMBER_ID = CT1.MEMBER_PARENT_ID
    LEFT JOIN #CUST1 C2
        ON CT1.MEMBER_ID = C2.MEMBER_ID
    LEFT JOIN #CUST1_TREE CT2
        ON CT1.MEMBER_ID = CT2.MEMBER_PARENT_ID
    LEFT JOIN #CUST1 C3
        ON CT2.MEMBER_ID = C3.MEMBER_ID
WHERE CT1.MEMBER_ID IS NOT NULL

希望这有帮助！如果这回答了您的问题，请务必查看此答案。谢谢！

与父母和孩子里面的表

1 个答案: