Question

我有这两个问题：

$db
->prepare("UPDATE users 
            SET reputation = reputation + (CASE id  WHEN ? THEN 2 WHEN ? THEN 15 END),
                Money      = Money      + (CASE id  WHEN ? THEN ? WHEN ? THEN ?  END)
            WHERE id IN (?, ?); ")
->execute(array($author_ques_id, $author_ans_id, 
                $author_ques_id, $asker_amount, $author_ans_id, $responder_amount,
                $author_ans_id, $author_ques_id));


$db
->prepare("INSERT INTO events (type, score, post_id, table_code, user_id, author_id, date_time )
                       VALUES (4   , 2    , ?      , 15        , ?      , ?        , UNIX_TIMESTAMP() ),
                              (4   , 15   , ?      , 15        , ?      , ?        , UNIX_TIMESTAMP() ),
                              (5   , ?    , ?      , 15        , ?      , ?        , UNIX_TIMESTAMP() ),
                              (5   , ?    , ?      , 15        , ?      , ?        , UNIX_TIMESTAMP() )")
->execute(array($answer_id, $author_ques_id, $author_ques_id,
                $answer_id, $author_ques_id, $author_ans_id,
                $asker_amount, $ques_id, $author_ques_id, $author_ques_id,
                $responder_amount, $answer_id, $author_ques_id, $author_ans_id));

当这个条件为真时，上述两个查询应该是正确的：

if ( $author_ques_id != $author_ans_id ) {
    // then queries above are fine
} else {
    // queries should be like below
}

正如我在上述条件中所评论的，如果该条件是 false ，那么这两个查询应该是这样的：

$db
->prepare("UPDATE users 
            SET reputation = reputation + 2,
                Money      = Money      + ?
            WHERE id ?; ")
->execute(array($asker_amount,
                $author_ques_id));


$db
->prepare("INSERT INTO events (type, score, post_id, table_code, user_id, author_id, date_time )
                       VALUES (4   , 2    , ?      , 15        , ?      , ?        , UNIX_TIMESTAMP() ),
                              (5   , ?    , ?      , 15        , ?      , ?        , UNIX_TIMESTAMP() )")
->execute(array($answer_id, $author_ques_id, $author_ques_id,
                $asker_amount, $ques_id, $author_ques_id, $author_ques_id));

好的，我只想知道，我应该为每个案例写两次这些查询吗？或者我可以根据该条件创建动态查询吗？

Answer 1

您的查询完全不同，因此请将它们分开并为每个案例编写它们，至少是更新语句。

对于插入，您可以在if-else中定义值并将它们写入数组，然后遍历数组以在另一行之后插入一行。喜欢这个

if($x ===true){
    $update = "....";
    $values = array(array(1,"b",3,4), array(5,6,7,8));
}else{
    $update = "....";
    $values = array(array(0,0,"c",6));
}
$insert = $pdo->prepare('INTO table (col1, col2, col3, col4) VALUES (?,?,?,?)');
foreach($values as $row){
    $insert->execute($row);
}

如何根据条件向数组中添加一些项？

1 个答案: