Ms access 我如何在Access中清楚地计数?
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: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
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