[英]Select and insert in one query SQL
我有一個網頁,用戶單擊地圖,緯度和經度將傳遞到文本字段,並且連同其他一些詳細信息一起將數據提交到數據庫。 我有一個計算最近的城鎮的公式,還有一些城鎮的經緯度樣本表。
目前,我可以顯示最近的城鎮和距離,但無法將其發送到數據庫。 我想我需要將兩個查詢放在一起,但我不知道如何。 請客氣,我知道我的代碼很糟糕,並且有很多安全問題,稍后我將嘗試解決。 謝謝!
<?php
$conn = Connect();
/**
* Use the Haversine Formula to display the 100 closest matches to $origLat, $origLon
* Only search the MySQL table $tableName for matches within a 10 mile ($dist) radius.
*/
$origLat = $conn->real_escape_string($_POST['lat']);
$origLon = $conn->real_escape_string($_POST['lng']);
// This is the maximum distance (in miles) away from $origLat, $origLon in which to search
$dist = 50;
$query = "SELECT Townland, lat, lng, 3956 * 2 *
ASIN(SQRT( POWER(SIN(($origLat - lat)*pi()/180/2),2)
+COS($origLat*pi()/180 )*COS(lat*pi()/180)
*POWER(SIN(($origLon-lng)*pi()/180/2),2)))
as distance FROM townland WHERE
lng between ($origLon-$dist/cos(radians($origLat))*69)
and ($origLon+$dist/cos(radians($origLat))*69)
and lat between ($origLat-($dist/69))
and ($origLat+($dist/69))
having distance < $dist ORDER BY distance limit 1";
$result = mysqli_query($conn, $query) or die(mysql_error());
while($row = mysqli_fetch_assoc($result)) {
echo $row['Townland']." > ".$row['distance']."<BR>";
}
$User_ID = $conn->real_escape_string($_POST['User_ID']);
$Species_Name = $conn->real_escape_string($_POST['Species_Name']);
$No_Of_Birds = $conn->real_escape_string($_POST['No_Of_Birds']);
$newdate = $conn->real_escape_string($_POST['Sighting_Date']);
//Converts date to 'yyyy-mm-dd' acceptable to mysql
$newdate=date('Y-m-d',strtotime($newdate));
$Sighting_Details = $conn->real_escape_string($_POST['Sighting_Details']);
$lat = $conn->real_escape_string($_POST['lat']);
$lng = $conn->real_escape_string($_POST['lng']);
$townland = $row['Townland'];
$query = "INSERT into sighting
(User_ID, Species_Name, No_Of_Birds,
Sighting_Date, Sighting_Details,
lat, lng, Townland)
VALUES('" . $User_ID . "','" . $Species_Name . "','" . $No_Of_Birds . "','"
. $newdate . "','" . $Sighting_Details . "','"
. $lat . "','" . $lng . "','" . $townland . "')";
$success = $conn->query($query);
if (!$success) {
die("Couldn't enter data: ".$conn->error);
}
header("Location: ../View/thankYouSubmitSighting.php");
$conn->close();
exit();
while($row = mysqli_fetch_assoc($result)) {
echo $row['Townland']." > ".$row['distance']."<BR>";
}
mysqli_close($conn);
?>
如果您需要將查詢的結果插入表中,例如:my_table可能是您需要插入選擇查詢(由兩部分組成的單個sql命令)
"INSERT into my_table (Townland, lat, lng, distance)
SELECT Townland, lat, lng, 3956 * 2 *
ASIN(SQRT( POWER(SIN(($origLat - lat)*pi()/180/2),2)
+COS($origLat*pi()/180 )*COS(lat*pi()/180)
*POWER(SIN(($origLon-lng)*pi()/180/2),2)))
as distance FROM townland WHERE
lng between ($origLon-$dist/cos(radians($origLat))*69)
and ($origLon+$dist/cos(radians($origLat))*69)
and lat between ($origLat-($dist/69))
and ($origLat+($dist/69))
having distance < $dist ORDER BY distance limit 1";
聲明:本站的技術帖子網頁,遵循CC BY-SA 4.0協議,如果您需要轉載,請注明本站網址或者原文地址。任何問題請咨詢:yoyou2525@163.com.