[英]MySQL insert statement won't insert?
我在下面附加了我的PHP代碼。 它可以正確計算累積值並正確構建SQL語句(通過echo $sql;
測試)。 但是,插入MySQL的instert語句不成功。 有任何想法嗎?
<?php
ini_set('memory_limit', '500M');
set_time_limit(1800);
$dbh = new mysqli('localhost','user','password','database') or die(mysql_error());
$query = "SELECT * FROM table1 ORDER BY id, date";
$del = "DELETE FROM table2";
$dbh->query($del);
if ($dbh->multi_query($query)){
if ($result = $dbh->store_result()){
$id = 0;
while ($row = $result->fetch_row()){
$date = $row[0];
$cvalue = $row[2];
$id = $row[1];
$cumulative = 0;
// Pull most recent cumulative value
$sql_recent = "SELECT * FROM table2 WHERE id = $id ORDER BY date DESC LIMIT 1";
if ($dbh->multi_query($sql_recent)){
if ($result_recent = $dbh->store_result()){
while ($row_recent = $result_recent->fetch_row()){
if($row_recent[0] != $date){
$cumulative = $row_recent[2];
}
}
}
}
$cumulative += $cvalue;
$sql = 'INSERT INTO table2 (id, date, cumulative) VALUES (';
$sql .= "'".$row[1]."',";
$sql .= "'".$date."',";
$sql .= "'".$cumulative."',";
$sql .= ')';
$dbh->query($sql);
echo $sql;
}
}
}
$dbh->close();
?>
最后一個值后面有一個逗號:
$sql .= "'".$cumulative."',";
嘗試刪除它:
$sql .= "'".$cumulative."'";
$ cumulative之后的逗號將使語法錯誤。
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