Question

max

获得数据表中，值最大的

max($table, $column, $where)

• table [string]

  表名.

• column [string]

  查询的字段列.

• where (optional) [array]

  WHERE 条件.

max($table, $join, $column, $where)

• table [string]

  表名.

• join [array]

  多表查询.

• column [string]

  字段名.

• where (optional) [array]

  条件.

Return: [number] 返回最大的值.这个返回数值类型.

$max = $database->max("account", "age", [    "gender" => "female"]);echo "The age of oldest female user is " . $max;