SQL查询重复记录

Question

我有下面的表.Oquer工作正常，但它显示完整的重复记录。我希望所有带名称的记录单次出现

GridSplitter

查询：

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Answer 1

Use DISTINCT keyword

select DISTINCT t1.* from customer t1 join (select Name, max(timestamp) as 
maxstamp from customer group by Name) xx  on t1.Name = xx.Name
and t1.timestamp = xx.maxstamp;

Answer 2

在SQLite 3.7.11或更高版本（Android Jelly Bean或更高版本）中，您只需将MAX（）与GROUP BY一起使用：

SELECT Name, Address, City, Contact, MAX(timestamp) AS timestamp
FROM Customer
GROUP BY Name;