沒有時間使用DATETIME的MYSQL SELECT語句

Question

這完美地工作：

SELECT DISTINCT customers 
FROM customertable 
WHERE time_paid BETWEEN '2016-06-28 10:27:55' AND '2016-07-05 14:07:51';

但是，由於我使用javascript datepicker來讓用戶選擇日期時間段，並且只有日期，但是沒有時間，這顯然行不通：

SELECT DISTINCT customers 
FROM customertable 
WHERE time_paid BETWEEN '2016-06-28' AND '2016-07-05';

我的選擇語句是這樣的： $t1是較低日期，而$t2是較高日期。

$sql = "SELECT DISTINCT customertable FROM customer WHERE time_paid BETWEEN '$t1' AND '$t2'";

$result = mysqli_query($conn, $sql);
$rowcount = mysqli_num_rows($result);

有沒有一種方法可以在我的select語句上插入一個串聯日期，例如'$t1'.12.00.00 ，以便在選擇時照顧數據庫中完整的DATETIME條目？

Answer 1

使用mysql函數添加日期

mysql> SELECT '2008-01-02';
+------------+
| 2008-01-02 |
+------------+
| 2008-01-02 |
+------------+
1 row in set (0.00 sec)

mysql> SELECT ADDDATE('2008-01-02', INTERVAL 0 HOUR);
+----------------------------------------+
| ADDDATE('2008-01-02', INTERVAL 0 HOUR) |
+----------------------------------------+
| 2008-01-02 00:00:00                    |
+----------------------------------------+
1 row in set (0.00 sec)


SELECT DISTINCT customertable FROM customer WHERE time_paid BETWEEN ADDDATE('$t1',INTERVAL 0 HOUR) AND ADDDATE('$t2',INTERVAL '23:59' HOUR_MINUTE)";