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Ms access 我如何在Access中清楚地计数?_Ms Access - Fatal编程技术网

Ms access 我如何在Access中清楚地计数?

Ms access 我如何在Access中清楚地计数?,ms-access,Ms Access,我需要一个查询来计算记录的数量,并将计数放在它所代表的记录旁边。例如: Turkey France Turkey United States Italy Italy Turkey France United States France Italy Italy 变成: Country NumberOfVisits Turkey 4 France 3 United States 2 Italy 4 我似乎无法让这些国

我需要一个查询来计算记录的数量,并将计数放在它所代表的记录旁边。例如:

Turkey
France
Turkey
United States
Italy
Italy
Turkey
France
United States
France
Italy
Italy
变成:

Country       NumberOfVisits
Turkey           4
France           3
United States    2
Italy            4

我似乎无法让这些国家在这篇文章中显示自己的行

您需要在SQL语句中使用
分组依据,例如:

SELECT Country, Count(*) as NumberOfVisits FROM CountryTable GROUP BY Country

您需要在SQL语句中使用
分组依据
,例如:

SELECT Country, Count(*) as NumberOfVisits FROM CountryTable GROUP BY Country

好极了。我把GROUPBY子句放在FROM子句之前。谢谢好极了。我把GROUPBY子句放在FROM子句之前。谢谢