Insert Code
$tid = $_POST['tid'];
$Name = $_POST['Name'];


// please remove last ' , (coma)' from fileds

mysqli_query($conn,"INSERT INTO `TestTable` ( `tid`,`Name`, ) VALUES ('$tid','$Name',)");
Select Single
$getdata = mysqli_query($conn,"SELECT * FROM TestTable ");
$row = mysqli_fetch_array($getdata);
$tid = $row['tid'];
$Name = $row['Name'];
Select While
$getdata = mysqli_query($conn,"SELECT * FROM TestTable ");
while($row = mysqli_fetch_array($getdata)) {
$tid = $row['tid'];
$Name = $row['Name'];
}
Delete Code
$getid = $_GET['id'];
mysqli_query($conn,"DELETE FROM TestTable WHERE tid ='$id' ");
Update Single Code
$tid = $_POST['tid'];
$Name = $_POST['Name'];

mysqli_query($conn,"UPDATE `TestTable` SET `tid` = '$tid' WHERE `TestTable`.`tid` = 1")
mysqli_query($conn,"UPDATE `TestTable` SET `Name` = '$Name' WHERE `TestTable`.`tid` = 1")