使用GROUP BY检索满足条件的记录

Question

我只想从几千条记录中选择计数大于1的行（换句话说，重复数字），我主要看到1s，其中有几个2s和3s

SELECT count( * ) AS `Number` , GI . *
FROM `GeneralInformation` AS GI
GROUP BY `FirstName` , `Surname` 

我该怎么做？

Answer 1

SELECT count( * ) AS `Number` , GI . *
FROM `GeneralInformation` AS GI
GROUP BY `FirstName` , `Surname` 
HAVING count(*)>1

Answer 2

使用Having子句

SELECT count( * ) AS `Number` , GI . *
FROM `GeneralInformation` AS GI
GROUP BY `FirstName` , `Surname` 
HAVING count( * ) > 1