Insert INTO NOT EXISTS SQL 访问

Question

我正在尝试使用 sql 将来自另一个 table 的记录插入到 Access 中的 table 中。我已经粘贴了下面的声明。我想插入存在于 ImportMetricsIDs01262015 但不存在于 ShouldImportMetricsIDs 中的记录。它运行完美，没有任何错误，但即使我实际添加新记录，它也不会插入任何内容。

INSERT INTO ShouldImportMetricsIDsTable ( [Formulary ID], [Market Segment] )
SELECT ImportMetricsIDs01262015.[Formulary ID], ImportMetricsIDs01262015.[Market Segment]
FROM ImportMetricsIDs01262015
WHERE NOT EXISTS (SELECT *
FROM ShouldImportMetricsIDsTable);

Answer 1

您需要关联子句。子查询只检查 table 是否为空。类似于：

INSERT INTO ShouldImportMetricsIDsTable( [Formulary ID], [Market Segment] )
    SELECT im.[Formulary ID], im.[Market Segment]
    FROM ImportMetricsIDs01262015 as im
    WHERE NOT EXISTS (SELECT 1
                      FROM ShouldImportMetricsIDsTable as sim
                      WHERE im.[Formulary ID] = sim.[Formulary ID] AND
                            im.[Market Segment] = sim.[Market Segment]
                     );

Answer 2

您需要将 NOT Exist 查询与 ImportMetricsIDs01262015 table

相关联

此代码假设 FormularyID 是 table 中的键。

INSERT INTO ShouldImportMetricsIDsTable (
    [Formulary ID]
    ,[Market Segment]
    )
SELECT ImportMetricsIDs01262015.[Formulary ID]
    ,ImportMetricsIDs01262015.[Market Segment]
FROM ImportMetricsIDs01262015
WHERE NOT EXISTS (
        SELECT *
        FROM ShouldImportMetricsIDsTable
        where ShouldImportMetricsIDsTable.[Formulary ID] = ImportMetricsIDs01262015.[Formulary ID]
        );

Answer 3

关键字"TOP"是访问所必需的，在代码中加粗斜体

INSERT INTO ShouldImportMetricsIDsTable( [Formulary ID], [Market Segment] )
SELECT im.[Formulary ID], im.[Market Segment]
FROM ImportMetricsIDs01262015 as im
WHERE NOT EXISTS (SELECT 
***TOP*** 1
                  FROM ShouldImportMetricsIDsTable as sim
                  WHERE im.[Formulary ID] = sim.[Formulary ID] AND
                        im.[Market Segment] = sim.[Market Segment]
                 );

Insert INTO NOT EXISTS SQL 访问

Insert INTO NOT EXISTS SQL access

sql

ms-access

vba

insert