要了解MAX函数，请考虑一个employee_tbl表，该表具有以下记录-

mysql>SELECT*FROMemployee_tbl;+------+------+------------+--------------------+|id|name|work_date|daily_typing_pages|+------+------+------------+--------------------+|1|John|2007-01-24|250||2|Ram|2007-05-27|220||3|Jack|2007-05-06|170||3|Jack|2007-04-06|100||4|Jill|2007-04-06|220||5|Zara|2007-06-06|300||5|Zara|2007-02-06|350|+------+------+------------+--------------------+7rowsinset(0.00sec)

现在，假设基于上表您要获取daily_typing_pages的最大值，那么您可以使用以下命令简单地做到这一点：

mysql>SELECTMAX(daily_typing_pages)->FROMemployee_tbl;+-------------------------+|MAX(daily_typing_pages)|+-------------------------+|350|+-------------------------+1rowinset(0.00sec)

您可以使用GROUP BY子句找到每个名称具有最大值的所有记录，如下所示-

mysql>SELECTid,name,MAX(daily_typing_pages)->FROMemployee_tblGROUPBYname;+------+------+-------------------------+|id|name|MAX(daily_typing_pages)|+------+------+-------------------------+|3|Jack|170||4|Jill|220||1|John|250||2|Ram|220||5|Zara|350|+------+------+-------------------------+5rowsinset(0.00sec)

您也可以将MIN函数和MAX函数一起使用以找出最小值。尝试以下示例-

mysql>SELECTMIN(daily_typing_pages)least,MAX(daily_typing_pages)max->FROMemployee_tbl;+-------+------+|least|max|+-------+------+|100|350|+-------+------+1rowinset(0.01sec)