mysql - 获取单个表 MySQL 中的计数

Question

我需要获取拥有超过一名成员(member)的所有俱乐部的 Club_ID；

这是sql:

CREATE  TABLE `Members` (
  `ID` INT NOT NULL AUTO_INCREMENT ,
  `Club_ID` INT NULL ,
  `Name` VARCHAR(45) NULL ,
  PRIMARY KEY (`ID`) );


INSERT INTO `Members` (`Club_ID`, `Name`) VALUES ('1', 'Jim');
INSERT INTO `Members` (`Club_ID`, `Name`) VALUES ('2', 'John');
INSERT INTO `Members` (`Club_ID`, `Name`) VALUES ('1', 'Bill');
INSERT INTO `Members` (`Club_ID`, `Name`) VALUES ('3', 'Stan');
INSERT INTO `Members` (`Club_ID`, `Name`) VALUES ('4', 'David');
INSERT INTO `Members` (`Club_ID`, `Name`) VALUES ('1', 'Tony');
INSERT INTO `Members` (`Club_ID`, `Name`) VALUES ('5', 'Oscar');

这应该返回 Only Club_ID =1!

Answer 1

  SELECT COUNT(*), Club_ID
    FROM Members
GROUP BY Club_ID
  HAVING COUNT(*) > 1