从同一天加入总和

Question

如何从同一日期加入总和（美元）并在MySQL和PHP中按日期显示它们？

ID = auto_increment

我想结果是这样的

2012-01-14 - 48
2012-02-21 - 19
2012-02-25 - 31
2012-03-01 - 11

Answer 1

SELECT date, SUM(dollar)
  FROM tableName
 GROUP BY date

Answer 2

SELECT `DATE`, SUM(`DOLLAR`) FROM your_table GROUP BY `DATE`;

http://www.tizag.com/mysqlTutorial/mysqlgroupby.php