Question

我有一个Access Query，我用它来根据表单生成报告。我在查询中遇到了重复记录的问题。

经过一番调查后，我发现这是因为我有一个包含多个潜在值的查找字段，并且每次在该字段中存在值时查询都会创建记录，尽管每个值都显示所有值（其中是预期的结果。）

知道如何解决这个问题吗？我只是希望它在查询结果中显示每个记录的一个实例。

我已经尝试将查询设置为使用唯一值和唯一记录，而唯一值只会导致它在我运行查询时提示我输入查找字段的数据。

查询的SQL是：

PARAMETERS [Enter Start Date:] DateTime, [Enter End Date:] DateTime;
SELECT DISTINCTROW RA_Generic.ID, RA_Generic.Title, RA_Generic.Description, 
RA_Generic.[Person Carrying Out], RA_Generic.Hazard_1, 
RA_Generic.Level_Of_Risk_1, RA_Generic.Control_Measures_1, 
RA_Generic.Worst_Possible_Outcome_1, RA_Generic.Level_Of_Risk_1_After, 
RA_Generic.Hazard_2, RA_Generic.Level_Of_Risk_2, 
RA_Generic.Control_Measures_2, RA_Generic.Worst_Possible_Outcome_2, 
RA_Generic.Level_Of_Risk_2_After, RA_Generic.Hazard_3, 
RA_Generic.Level_Of_Risk_3, RA_Generic.Control_Measures_3, 
RA_Generic.Worst_Possible_Outcome_3, RA_Generic.Level_Of_Risk_3_After, 
RA_Generic.Hazard_4, RA_Generic.Level_Of_Risk_4, 
RA_Generic.Control_Measures_4, RA_Generic.Worst_Possible_Outcome_4, 
RA_Generic.Level_Of_Risk_4_After, RA_Generic.Hazard_5, 
RA_Generic.Level_Of_Risk_5, RA_Generic.Control_Measures_5, 
RA_Generic.Worst_Possible_Outcome_5, RA_Generic.Level_Of_Risk_5_After, 
RA_Generic.Hazard_6, RA_Generic.Level_Of_Risk_6, 
RA_Generic.Control_Measures_6, RA_Generic.Worst_Possible_Outcome_6, 
RA_Generic.Level_Of_Risk_6_After, RA_Generic.Date_Updated, 
RA_Generic.Type_Of_RA, RA_Generic.Specific, RA_Generic.[Hazard Types]
FROM RA_Generic
GROUP BY RA_Generic.ID, RA_Generic.Title, RA_Generic.Description, 
RA_Generic.[Person Carrying Out], RA_Generic.Hazard_1, 
RA_Generic.Level_Of_Risk_1, RA_Generic.Control_Measures_1, 
RA_Generic.Worst_Possible_Outcome_1, RA_Generic.Level_Of_Risk_1_After, 
RA_Generic.Hazard_2, RA_Generic.Level_Of_Risk_2, 
RA_Generic.Control_Measures_2, RA_Generic.Worst_Possible_Outcome_2, 
RA_Generic.Level_Of_Risk_2_After, RA_Generic.Hazard_3, 
RA_Generic.Level_Of_Risk_3, RA_Generic.Control_Measures_3, 
RA_Generic.Worst_Possible_Outcome_3, RA_Generic.Level_Of_Risk_3_After, 
RA_Generic.Hazard_4, RA_Generic.Level_Of_Risk_4, 
RA_Generic.Control_Measures_4, RA_Generic.Worst_Possible_Outcome_4, 
RA_Generic.Level_Of_Risk_4_After, RA_Generic.Hazard_5, 
RA_Generic.Level_Of_Risk_5, RA_Generic.Control_Measures_5, 
RA_Generic.Worst_Possible_Outcome_5, RA_Generic.Level_Of_Risk_5_After, 
RA_Generic.Hazard_6, RA_Generic.Level_Of_Risk_6, 
RA_Generic.Control_Measures_6, RA_Generic.Worst_Possible_Outcome_6, 
RA_Generic.Level_Of_Risk_6_After, RA_Generic.Date_Updated, 
RA_Generic.Type_Of_RA, RA_Generic.Specific
HAVING (((RA_Generic.Date_Updated) Between [Enter Start Date:] And [Enter 
End Date:]))
ORDER BY RA_Generic.ID DESC;

导致问题的字段是HazardTypes

Answer 1

我将删除GROUP BY子句DISTINCTROW，并将HAVING子句移到WHERE子句，因为您没有进行任何聚合。< / p>

PARAMETERS [Enter Start Date:] DateTime, [Enter End Date:] DateTime;
SELECT RA_Generic.ID, RA_Generic.Title, RA_Generic.Description, 
RA_Generic.[Person Carrying Out], RA_Generic.Hazard_1, 
RA_Generic.Level_Of_Risk_1, RA_Generic.Control_Measures_1, 
RA_Generic.Worst_Possible_Outcome_1, RA_Generic.Level_Of_Risk_1_After, 
RA_Generic.Hazard_2, RA_Generic.Level_Of_Risk_2, 
RA_Generic.Control_Measures_2, RA_Generic.Worst_Possible_Outcome_2, 
RA_Generic.Level_Of_Risk_2_After, RA_Generic.Hazard_3, 
RA_Generic.Level_Of_Risk_3, RA_Generic.Control_Measures_3, 
RA_Generic.Worst_Possible_Outcome_3, RA_Generic.Level_Of_Risk_3_After, 
RA_Generic.Hazard_4, RA_Generic.Level_Of_Risk_4, 
RA_Generic.Control_Measures_4, RA_Generic.Worst_Possible_Outcome_4, 
RA_Generic.Level_Of_Risk_4_After, RA_Generic.Hazard_5, 
RA_Generic.Level_Of_Risk_5, RA_Generic.Control_Measures_5, 
RA_Generic.Worst_Possible_Outcome_5, RA_Generic.Level_Of_Risk_5_After, 
RA_Generic.Hazard_6, RA_Generic.Level_Of_Risk_6, 
RA_Generic.Control_Measures_6, RA_Generic.Worst_Possible_Outcome_6, 
RA_Generic.Level_Of_Risk_6_After, RA_Generic.Date_Updated, 
RA_Generic.Type_Of_RA, RA_Generic.Specific, RA_Generic.[Hazard Types]
FROM RA_Generic
WHERE (((RA_Generic.Date_Updated) Between [Enter Start Date:] And [Enter 
End Date:]))
ORDER BY RA_Generic.ID DESC;

Microsoft Access Query生成重复的结果

1 个答案: