Question

我想从特定月份的mysql表中获取结果。我写查询但查询不正常。有人可以帮忙吗？

$sql = "SELECT sum(size) as size FROM tb_size WHERE MONTH(date_created) = '" . mysqli_real_escape_string($db, "Oct") . "' AND YEAR(date_created) =   YEAR(CURRENT_DATE()";
$query = mysqli_query($db, $sql);
$result = mysqli_fetch_object($query);
$size = $result->size;
echo $size;

Answer 1

MONTH()会返回一个数字。所以你的查询应该是这样的：

SELECT sum(size) as size
FROM tb_size
WHERE MONTH(date_created) = 10 AND YEAR(date_created) = YEAR(CURRENT_DATE();

如果您希望Oct匹配，则可以改为使用DATE_FORMAT()：

SELECT sum(size) as size
FROM tb_size
WHERE DATE_FORMAT(date_created, '%b') = 'Oct' AND YEAR(date_created) = YEAR(CURRENT_DATE();

Answer 2

如上所述 - Month会返回一个数字：https://www.w3resource.com/mysql/date-and-time-functions/mysql-month-function.php

您可以使用MonthName：https://www.w3resource.com/mysql/date-and-time-functions/mysql-monthname-function.php，但会返回一个全名（十月），而不是您正在使用的十月。

您还可以使用DATE_FORMAT(date_created, '%b')获取短月名称

从特定月份，php，mysql的mysql表中获取结果

2 个答案: