mysql - INNERJOINはtable2から列を選択します

Question

INNER JOINを使用して、2番目と3番目のテーブルから特定の列を選択するにはどうすればよいですか。

SELECT 
    *
FROM
    1_packages_plu AS p
        INNER JOIN
    1_stock as s ON p.fk_products_id = s.fk_products_id
        AND branch = 1
        INNER JOIN
    1_products AS j ON p.fk_products_id = j.id
WHERE
    fk_packages_id = 54;

テーブルでは、列1_stockの値のみを返したいのですが、必要なのはmake、model列だけです。stock-repair1_products

Answer 1

SELECT
    p.* -- All columns from p
    ,
    s.columnName -- Just that column from s
    ,
    j.columnName -- And just that column from j

FROM
    1_packages_plu AS p

    INNER JOIN 1_stock as s
        ON p.fk_products_id = s.fk_products_id
        AND
        branch = 1

    INNER JOIN 1_products AS j
        ON p.fk_products_id = j.id

WHERE
    fk_packages_id = 54

Answer 2

列にアクセスするには（。）演算子が必要です。

SELECT 
    p.* , 
    s.stock-repair, 
    j.make, j.model
FROM
    1_packages_plu AS p
        INNER JOIN 1_stock as s 
          ON p.fk_products_id = s.fk_products_id
               AND branch = 1
        INNER JOIN 1_products AS j 
          ON p.fk_products_id = j.id
WHERE
    fk_packages_id = 54

ORDER BY p.colunmname 
;

Answer 3

SELECT Table1.*, Table2.FK, Table2.SomeColumn, Table2.SomeColumn, Table3.SomeColumn, Table3.SomeColumn
FROM   
Table1 INNER JOIN
Table2 ON Table1.FK = Table2.Table1FK INNER JOIN
Table3 ON Table2.FK = Table3.Table2FK