php - MySQL - 根据用户输入动态显示月份

我不知道该怎么做。我已经无计可施，已经用尽了我现在拥有的所有资源。

好吧，我有一个包含列、月份名称、财政年度和金额的数据库。

DROP TABLE IF EXISTS `savings`;
/*!40101 SET @saved_cs_client     = @@character_set_client */;
/*!40101 SET character_set_client = utf8 */;
CREATE TABLE `savings` (
  `id` int(10) unsigned NOT NULL AUTO_INCREMENT,
  `account_id` int(10) NOT NULL,
  `monthname` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
  `fiscal_year` varchar(45) COLLATE utf8_unicode_ci DEFAULT NULL,
  `amount` decimal(30,2) DEFAULT NULL,
  `created_at` timestamp NULL DEFAULT NULL,
  `updated_at` timestamp NULL DEFAULT CURRENT_TIMESTAMP,
  PRIMARY KEY (`id`),
  UNIQUE KEY `net_savings_id_unique` (`id`,`account_id`)
) ENGINE=InnoDB AUTO_INCREMENT=841 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci;
/*!40101 SET character_set_client = @saved_cs_client */;

内容如下:

LOCK TABLES `savings` WRITE;
/*!40000 ALTER TABLE `net_savings` DISABLE KEYS */;
INSERT INTO `net_savings` VALUES (1,1,'January','2016',-1291.47,'2016-09-23 06:45:00','2016-09-23 06:45:00'),(2,1,'February','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(3,1,'March','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(4,1,'April','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(5,1,'May','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(6,1,'June','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(7,1,'July','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(8,1,'August','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(9,1,'September','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(10,1,'October','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(11,1,'November','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(12,1,'December','2016',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(13,1,'January','2017',389296.02,'2016-09-23 06:45:00','2016-09-23 06:45:00'),(14,1,'February','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(15,1,'March','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(16,1,'April','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(17,1,'May','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(18,1,'June','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(19,1,'July','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(20,1,'August','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(21,1,'September','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(22,1,'October','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(23,1,'November','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(24,1,'December','2017',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(25,1,'January','2018',216143.70,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(26,1,'February','2018',0.00,'2016-09-23 06:45:00','2016-09-28 02:36:34'),(27,1,'March','2018',0.00,'2016-09-23 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/*!40000 ALTER TABLE `net_savings` ENABLE KEYS */;
UNLOCK TABLES;

正如您所看到的，这对我来说变得更加复杂，因为用户想要输入四个值。

来自:月份和财政年度
收件人:月份和财政年度

现在如果我是用户，我想输入2016年6月和2017年3月。我的结果集将显示:

6月、7月、8月、9月、10月、11月、12月(2016年)、1月、2月、3月(2017年)

所以这将是非常动态的，我只有两列可供使用，并且它们都存储字符串。

这是我当前的代码，我卡在这里。

select a.id, a.account, a.region, sum(n.amount) as 'TotalNet',
  sum(case when n.monthname = "November" then n.amount else 0 end) as `Nov`,
  sum(case when n.monthname = "December" then n.amount else 0 end) as `Dec`,
  sum(case when n.monthname = "January" then n.amount else 0 end) as `Jan`,
  sum(case when n.monthname = "February" then n.amount else 0 end) as `Feb`,
  sum(case when n.monthname = "March" then n.amount else 0 end) as `Mar`,
  sum(case when n.monthname = "April" then n.amount else 0 end) as `Apr`,
  sum(case when n.monthname = "May" then n.amount else 0 end) as `May`,
  sum(case when n.monthname = "June" then n.amount else 0 end) as `Jun`,
  sum(case when n.monthname = "July" then n.amount else 0 end) as `Jul`,
  sum(case when n.monthname = "August" then n.amount else 0 end) as `Aug`,
  sum(case when n.monthname = "September" then n.amount else 0 end) as `Sep`,
  sum(case when n.monthname = "October" then n.amount else 0 end) as `Oct`
from 
savings n left outer join accounts a
on a.id = n.account_id
where fiscal_year = 2016
group by a.account
order by a.account desc;

请sql高手帮忙!提前致谢。

最佳答案

一般

您无法动态生成列。因此，在仅限 MySQL 的解决方案中，我们专注于创建行。在 PHP 解决方案中，我们正在 PHP 中进行转置。

PHP 方法

想法

让我们逐行查询表。然后转置它。我们还为 start 和 end 之间的每个月生成一个条目，以便始终有一个条目。

实现

SELECT a.account_id, fiscal_year, monthname, SUM(n.amount) as ThisMonth
FROM  savings n
LEFT OUTER JOIN accounts a
     ON .....
WHERE fiscal_year >= YEAR($start_date)
     AND monthname >= MONTHNAME($start_date)
     AND fiscal_year <= YEAR($end_date)
     AND monthname <= MONTHNAME($end_date)
GROUP BY c.date;

我们在哪里生成

$start_date = DateTime::createFromFormat('%M %Y', $input_start);
$end_date = DateTime::createFromFormat('%M %Y', $input_end);
$interval = DateInverall:createFromDateString('1 month');

现在让我们将其从行转置为列:

// QUERY OUR MYSQL USING PREPARED STATEMENTS
$dates = [];
for ($date = $start_date; $date <= $end_date; $date->add($interval)) {
   $dates[] = $date;
}

$accounts = [];
foreach($rows as $row) {
    if (!isset($accounts[$row['account_id']])) {
        $entry = []
        $accounts[$row['account_id']] = $entry;
    }
    $fyear = $row['fiscal_year'];
    $month = $row['monthname'];
    $accounts[$row['account_id']][$fyear][$month] = $row['TotalMonth'];
}

//print header. We are doing this very stupid here ,
//you want some sort of table layout
echo "Account ID";
foreach($dates as $date) {
    echo $date;
}
echo "\n";
// output our data
// at this point accounts is a multidimensional array: 
foreach($account as $aid => $account) {
   echo $aid;
   foreach($dates as $date) {
      $value = 0;
      if (!isset($account[$date->format('%Y')][$date->format('%M')])) {
         $value = $account[$date->format('%Y')][$date->format('%M')];
      }
      echo $value;
   }
   echo "\n";
}

仅 MySQL(每行)方法

想法

该解决方案侧重于每行解决方案。之后可以在 PHP 中完成转置。

我假设我们希望每个月都会生成，无论储蓄中是否有条目。

为了使任何 select 语句成功，我们需要一个可供选择的表。虽然我们可以为每个条目生成任意值，但我们仍然需要可用的条目。

在我们的例子中，最简单的方法是生成一个包含日期的表格。

日历表

让我们生成一个包含从 1900 到 2100 的条目的表:

DELIMITER //
CREATE PROCEDURE gen_cal()
  BEGIN
    CREATE TABLE `calendar` (`date` DATE NOT NULL);
    SET @start = MAKEDATE(1900, 1);
    WHILE @start <= MAKEDATE(2100, 1) DO
      INSERT INTO `calendar` (`date`) VALUES (@start);
      SET @start = ADDDATE(@start, interval 1 month);
    END WHILE;
  END //
DELIMITER ;

让我们使用CALL生成它。它生成一个包含 2401 个条目的表。

CALL gen_cal();

选择

让我们使用全新的calendar表格来选择(为了简单起见，我删除了account部分)。

SELECT c.date, MONTHNAME(c.date) as month, SUM(n.amount) as ThisMonth
FROM calendar c
LEFT OUTER JOIN savings n
   ON fiscal_year = YEAR(c.date)
     AND monthname = MONTHNAME(c.date)
WHERE c.date
   BETWEEN STR_TO_DATE('1 March 2016', '%d %M %Y')
   AND STR_TO_DATE('1 March 2017', '%d %M %Y')
GROUP BY c.date;

请注意我们将格式“1 2017 年 3 月”到某个日期。我假设您可以通过带有用户给定数据的准备好的语句填写“1 % %”。

使用YEAR和MONTHNAME可以选择正确的日期，然后我们可以轻松地使用它来匹配用户给定的输入。

使用LEFT OUTER JOIN可确保我们为每个月生成一个条目，无论储蓄中是否有条目。

缺点

我们无法在 MySQL 中动态生成列。所以我们仅限于行。

关于php - MySQL - 根据用户输入动态显示月份，我们在Stack Overflow上找到一个类似的问题： https://stackoverflow.com/questions/39789602/

php - MySQL - 根据用户输入动态显示月份

一般

PHP 方法

想法

实现

仅 MySQL(每行)方法

想法

日历表

选择

缺点

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