I need to read the 'month' from table site_salmonusage. Here is the example of data in site_salmonusage. Then i need to count whether the data is exist or not, If it exist, then i need to update all data in that 'month'. If not exist, it will insert into.
if ($_POST['register']){
$entry_id=$_POST["entry_id"];
$storenum = $_POST["storenum"];
$store_name=$_POST["store_name"];
$month = $_POST["month"];
$usage = $_POST["usage"];
$remove=mysqli_query($con,"SELECT COUNT(*) As count FROM site_salmonusage WHERE month='$month' AND storenum='$storenum'");
$row=mysqli_fetch_array($remove);
if($row['count']==1){
$add1 = "UPDATE site_salmonusage
SET usage='$usage'
WHERE storenum='$storenum' AND month='$month'";
}
else if($row['count']==0){
$add = "INSERT INTO site_salmonusage (storenum, month, usage)
VALUES ('$storenum','$month',$usage')";
}
else {
$del= "DELETE FROM site_salmonusage WHERE month='$month'";
$adding="INSERT INTO site_salmonusage (storenum,month,usage)
VALUES ('$storenum','$month','$usage')";
}
Here is my php. But after submit button, it not insert into database.