1

我有一张看起来像这样的表：

国家 + form_ID + Original_form_Id + 目录

country  original_form   catalog form_id
1        6                  42           6
1        7                  368           7
1        69                  722         69
1        69                 1837         697
1        659                  2           659
1        666                 2           666

original_form_id 和form id 的点：除了国家+original_form-id 去不同目录的情况外，它总是相等的，在这行中的含义：

country  original_form   catalog form_id
1        69                  722         69
1        69                 1837         697

我需要从中创建 3 个表。一张表用于所有行 1:1（country+original_form 到目录）、第二个 N:1 和第三个 1:N 案例。意义：

第一桌1:1

country  original_form   catalog
1        6      42
1        7      368

第二表1：N

country  original_form catalog
1        69      722
1        69     1837

第三桌N:1

country  original_form   catalog
1        659      2
1        666     2

我使用下面的答案实现它，但有重复：

INSERT INTO Mapping_1ToN
(SELECT  ot1.Country_id, ot1.original_form_id, ot1.catalog_id, ot1.Local_id
FROM    mappingtable ot1
WHERE   EXISTS -- Multiple catalogs for same country+form
        (
        SELECT  *
        FROM    mappingtable ot2
        WHERE   ot1.country_id = ot2.country_id
                AND ot1.original_form_id = ot2.original_form_id
                AND ot1.form_id <> ot2.form_id
                AND ot1.catalog_id <> ot2.catalog_id
        ));

INSERT  INTO Mapping_NTo1
(SELECT  ot1.Country_id, ot1.original_form_id, ot1.catalog_id, ot1.Local_id
FROM    mappingtable ot1
WHERE   EXISTS -- Multiple forms for same catalog
        (
        SELECT  *
        FROM    mappingtable ot2
        WHERE   ot1.country_id = ot2.country_id
                AND ot1.original_form_id <> ot2.original_form_id
                AND ot1.catalog_id = ot2.catalog_id
        ));


INSERT  INTO Mapping_1To1
(SELECT  ot1.Country_id, ot1.original_form_id, ot1.catalog_id, ot1.Local_id
FROM    mappingtable ot1
WHERE   NOT EXISTS -- form+catalog unique per country
        (
        SELECT  ot2.Country_id, ot2.original_form_id, ot2.catalog_id, ot2.Local_id
        FROM    mappingtable ot2
        WHERE   ot1.country_id = ot2.country_id
                AND (
                    (ot1.original_form_id = ot2.original_form_id AND ot1.catalog_id <> ot2.catalog_id AND ot1.form_id = ot2.form_id)
                    OR
                    (ot1.original_form_id <> ot2.original_form_id AND ot1.catalog_id = ot2.catalog_id)
                )
        ));
4

1 回答 1

1

第一张表：

insert  Table1
select  *
from    OriginalTable ot1
where   not exists -- form+catalog unique per country
        (
        select  *
        from    OriginalTable ot2
        where   ot1.country = ot2.country
                and (
                    (ot1.form = ot2.form and ot1.catalog <> ot2.catalog)
                    or
                    (ot1.form <> ot2.form and ot1.catalog = ot2.catalog)
                )
        )

第二张表：

insert  Table2
select  ot1.*
from    OriginalTable ot1
where   exists -- Multiple catalogs for same country+form
        (
        select  *
        from    OriginalTable ot2
        where   ot1.country = ot2.country
                and ot1.form = ot2.form
                and ot1.catalog <> ot2.catalog
        )

第三张表：

insert  Table3
select  ot1.*
from    OriginalTable ot1
where   exists -- Multiple forms for same country+catalog
        (
        select  *
        from    OriginalTable ot2
        where   ot1.country = ot2.country
                and ot1.form <> ot2.form
                and ot1.catalog = ot2.catalog
        )

要查找最终会出现在 Table2 和 Table3 中的行，请运行：

select  *
from    OriginalTable ot1
where   exists
        (
        select  *
        from    OriginalTable ot2
        where   ot1.country = ot2.country
                and ot1.form <> ot2.form
                and ot1.catalog = ot2.catalog
        )
        and exists
        (
        select  *
        from    OriginalTable ot2
        where   ot1.country = ot2.country
                and ot1.form = ot2.form
                and ot1.catalog <> ot2.catalog
        )
于 2013-02-03T12:19:38.913 回答