ID FirstName LastName
1 John Doe
2 Bugs Bunny
3 John Johnson
我想从FirstName列中选择DISTINCT结果，但我需要相应的ID和LastName。
结果集只需要显示一个John，但是ID为1,LastName为Doe。
当前回答
试试这个查询
SELECT ID, FirstName, LastName FROM table GROUP BY(FirstName)
其他回答
SELECT ID,LastName
From TABLE_NAME
GROUP BY FirstName
HAVING COUNT(*) >=1
SELECT DISTINCT (column1), column2
FROM table1
GROUP BY column1
SELECT DISTINCT(firstName), ID, LastName from tableName GROUP BY firstName
在我看来这是最好的选择吗
SELECT firstName, ID, LastName from tableName GROUP BY firstName
不确定是否可以用MySQL做到这一点，但你可以在T-SQL中使用CTE
; WITH tmpPeople AS (
SELECT
DISTINCT(FirstName),
MIN(Id)
FROM People
)
SELECT
tP.Id,
tP.FirstName,
P.LastName
FROM tmpPeople tP
JOIN People P ON tP.Id = P.Id
否则，您可能不得不使用临时表。
