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MySQL中ROLLUP的替代方法

2020-11-09 来源:飒榕旅游知识分享网

欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入 今天从MySQL中提取数据,使用ROLLUP统计后,想在数据左边列中加入项目名称,使用SQL Sql代码 SELECT (CASE WHEN ISNULL(PLAYERNO) THEN PLAYERNO=TOTAL ELSE PLAYERNO END) AS PLAYERNO,SUM(AMO

欢迎进入Linux社区论坛,与200万技术人员互动交流 >>进入

  今天从MySQL中提取数据,使用ROLLUP统计后,想在数据左边列中加入项目名称,使用SQL

  Sql代码

  SELECT (CASE WHEN ISNULL(PLAYERNO) THEN PLAYERNO=TOTAL ELSE PLAYERNO END) AS PLAYERNO,SUM(AMOUNT) FROM penalties

  GROUP BY PLAYERNO WITH ROLLUP

  结果是:

  这样

  +----------+-------------+

  | PLAYERNO | SUM(AMOUNT) |

  +----------+-------------+

  | 6 | 100.00 |

  | 8 | 25.00 |

  | 27 | 175.00 |

  | 44 | 130.00 |

  | 104 | 50.00 |

  | NULL| 480.00 |

  +----------+-------------+

  6 rows in set, 1 warning (0.00 sec)

  显示为空值,修改如下:

  Sql代码

  SELECT PLAYERNO,SUM(AMOUNT) FROM penalties

  GROUP BY PLAYERNO

  UNION

  SELECT TOTAL,SUM(AMOUNT)

  FROM penalties

  显示结果:

  +----------+-------------+

  | PLAYERNO | SUM(AMOUNT) |

  +----------+-------------+

  | 6 | 100.00 |

  | 8 | 25.00 |

  | 27 | 175.00 |

  | 44 | 130.00 |

  | 104 | 50.00 |

  | TOTAL | 480.00 |

  +----------+-------------+

  6 rows in set (0.00 sec)

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