使用 GROUP BY 检索满足条件的记录

Question

我现在只想从几千条记录中选择计数大于 1 的行（换句话说，重复项），我大多看到 1 和一些 2 和 3，

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