Question

由于某些原因，以下select语句不在mariadb 10中执行，但在mariadb 5.5中执行良好。在5.5中，它从这两个时间范围内的数据库中选择值。无法使用相同的数据库选择任何10。问题是什么？任何人？谢谢。

$_SESSION['post-data'] = $_POST;

$t1 = $_SESSION['post-data']['t1'];
$t2 = $_SESSION['post-data']['t2'];
$time1 = mysqli_real_escape_string($conn, $t1);
$time2 = mysqli_real_escape_string($conn, $t2);

$sql =  "SELECT DISTINCT msisdn FROM customer WHERE DATE_FORMAT(time_paid,'%Y-%c-%e') 
     BETWEEN ADDDATE('$time1',INTERVAL 0 HOUR) 
        AND ADDDATE('$time2',INTERVAL '23:59' HOUR_MINUTE)";
$result = $conn->query($sql);

if ($result->num_rows > 0) {
  echo "Number of Recipients: ";  echo "$result->num_rows <br> <br>";
    // output data of each row
    while($row = $result->fetch_assoc()) {
 $mobilenumber[] = $row['msisdn'];

    }
} else {
    echo "No Contacts to Display";
}

$mob_numbers = implode(", " , $mobilenumber);
echo "$mob_numbers";
$_SESSION['numbers'] = $mob_numbers;

Answer 1

假设time_paid为DATE_FORMAT或DATE或DATETIME，请勿使用TIMESTAMP。这将允许您使用索引。然后添加此复合INDEX(time_paid, msisdn);它会很有帮助并且“覆盖”。

然后将BETWEEN更改为：

SELECT DISTINCT msisdn
    FROM customer
    WHERE time_paid >= $time1
      AND time_paid  < $time2 + INTERVAL 1 DAY

SELECT语句在mariadb 10.0中不起作用，但在mariadb 5.5中有效

1 个答案: