MySQL獲取當前月份的結果

Question

我試圖每天從mysql的結果轉換成php結果1個月，如果行不存在，則顯示0到該日期，如下所示

2017-09-07 - 70
2017-09-10 - 0
2017-09-11 - 100
2017-09-12 - 0
2017-09-15 - 0
2017-09-20 - 0
2017-09-29 - 200

我的表格名稱是交易，包括日期，ID和貸方字段。 我嘗試了下面在網上找到的代碼，但只顯示了1行，在這里我嘗試兩次檢索兩個日期1st和26th進行測試。

SELECT MonthDate.Date, COALESCE(SUM(`credits`), 0) FROM ( SELECT 1 AS Date UNION ALL SELECT 26) AS MonthDate LEFT JOIN transactions AS T1 ON MonthDate.Date = DAY(T1.Date) AND MONTH(T1.Date) = 9 AND YEAR(T1.Date) = 2017 WHERE MonthDate.Date <= DAY(LAST_DAY('2017-09-28'))

Answer 1

用SQL可以實現

建議您使用表“ your_table ”，其中包含“ value ”和“ date ”字段。 然后，SQL將如下所示：

select a.Date, IFNULL(your_table.value, 0)
from (
  select curdate() + INTERVAL 31 DAY - INTERVAL (a.a + (10 * b.a) + (100 * c.a)) DAY as Date
  from (
    select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9
    ) as a
  cross join (
    select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9
    ) as b
  cross join (
    select 0 as a union all select 1 union all select 2 union all select 3 union all select 4 union all select 5 union all select 6 union all select 7 union all select 8 union all select 9
    ) as c
  ) a
left join your_table on your_table.date = a.Date
where a.Date between 'PUT_START_DATE_HERE' and 'PUT_END_DATE_HERE'
order by a.Date;

Answer 2

如您所要求的示例，例如（:)），您就這樣獲取了SQL

SELECT `date`, `credits` FROM `table_name` WHERE 1

並獲得一個名為$ results的數組，像這樣

2017-09-07 => 70
2017-09-11 => 100
2017-09-29 => 200

因此，借助php幫助，您可以像這樣填補空缺的日子

$date = (new DateTime());
$lastDay = $date->modify('last day of this month')->format('d');
$firstDay = $date->modify('first day of this month')->format('d');

for($day = 0; $day < $lastDay; $day++) {
    $date = (new DateTime())
        ->modify('first day of this month')
        ->modify('+' . $day . ' day')
        ->format('Y-m-d');

    if(empty($result[$date])) {
        $result[$date] = 0;
    }
}

var_dump($result);