php - MySql 查询到数组到 MySql IN 查询

Question

我试图制作一个 ID 数组并在另一个查询中使用该数组以确保第二个查询结果具有与数组中相同的 ID。

根据我其余代码的要求，我不希望使用 join 方法。

    $topartistsquery = "SELECT main_id FROM pages WHERE catnum = '201' AND top100 = 'y'";
    $result = mysql_query($topartistsquery);
    $topartistarray = array();
    while(($row =  mysql_fetch_assoc($result))) {
        $topartistarray[] = $row['main_id'];
    }
    //print_r($topartistarray);

    $eventquery = mysql_query("SELECT * FROM TNDB_CSV2 WHERE City = '".$city."' AND PCatID = '2' AND PerformerID IN ($topartistarray) AND DateTime >= CURDATE() ORDER BY DateTime LIMIT 3");

这是 $topartistarray 的输出:

Array ( [0] => 28 [1] => 1126 [2] => 47643 [3] => 2769 [4] => 41512 [5] => 1429 [6] => 163 [7] => 48418 [8] => 198 [9] => 3748 [10] => 10161 [11] => 39890 [12] => 14160 [13] => 25407 [14] => 29219 [15] => 36980 [16] => 1860 [17] => 41299 [18] => 342 [19] => 7468 [20] => 33205 [21] => 1564 [22] => 33911 [23] => 15183 [24] => 540 [25] => 974 [26] => 8358 [27] => 30678 [28] => 4804 [29] => 4266 [30] => 517 [31] => 522 [32] => 1550 [33] => 15989 [34] => 930 [35] => 3383 [36] => 26468 [37] => 5560 [38] => 1063 [39] => 2870 [40] => 4055 [41] => 24917 [42] => 46223 [43] => 973 [44] => 334 [45] => 27970 [46] => 27985 [47] => 356 [48] => 6655 [49] => 201 [50] => 1930 [51] => 1069 [52] => 38053 [53] => 397 [54] => 21713 [55] => 53725 [56] => 4941 [57] => 864 [58] => 41904 [59] => 59233 [60] => 53970 [61] => 50875 [62] => 54175 [63] => 56861 [64] => 53317 [65] => 55258 [66] => 823 [67] => 55704 [68] => 59797 [69] => 27866 [70] => 123 [71] => 59749 [72] => 1567 [73] => 34851 [74] => 3399 [75] => 58674 [76] => 59442 [77] => 60334 ) 

非常感谢任何建设性的意见。提前谢谢你

Answer 1

试试这个:

if (isset($topartistarray) and count($topartistarray) {
    $eventquery = mysql_query("SELECT * FROM TNDB_CSV2 WHERE City = '".$city."' AND PCatID = '2' AND PerformerID IN (".implode(",",$topartistarray).") AND DateTime >= CURDATE() ORDER BY DateTime LIMIT 3");
} else {
    $eventquery = false;
}