SELECT * FROM table1 INNER JOIN table2 ON table1.id = table2.id WHERE子句

Question

我有一个关于在两个表上加入WHERE子句的问题，它涉及monthname（date）='$ month'。

**tbl_dv**
dv_id, number, net, respo, date_added 

**tbl_payroll**
pr_id, dv_id, number, pr_date, roll1, roll2, roll3, roll4, roll5, roll6 date_added.

我想添加ROLLS列并在view.php上查看。 像这样：$ total =（roll1 + roll2 + roll3 + roll4 + roll5 + roll6）; 如何做到并以独特的方式将其插入。

$viewrecord = "SELECT * FROM tbl_dv WHERE respo='".mysql_real_escape_string($data[0])."' && year(date_added)='$year' && month(date_added)='$month'";

Answer 1

您可以-

$viewrecord = "SELECT *, (roll1 + roll2 + roll3 + roll4 + roll5 + roll6) as total FROM tbl_dv join tbl_payroll on tbl_dv.dv_id = tbl_payroll.dv_id WHERE respo='".mysql_real_escape_string($data[0])."' && year(date_added)='$year' && month(date_added)='$month'";

Answer 2

<?php require_once('../includes/connection.php');?>
<?php require_once('../includes/header.php');?>

<?php
$color="1";
$respo = $_GET['respo'];
$data = explode("+", $respo);
$month = date("m", strtotime($data[1])) . "<br />";
$year = date("Y", strtotime($data[1])) . "<br />";

**$viewrecord = "SELECT *, (pr.roll1 + pr.roll2 + pr.roll3 + pr.roll4 + pr.roll5 + pr.roll6) AS rolls FROM tbl_payroll dv join tbl_payroll pr on pr.dv_id = dv.dv_id WHERE dv.respo='".mysql_real_escape_string($data[0])."' && year(dv.date_added)='$year' && month(dv.date_added)='$month'";**
$run_viewrecord = mysql_query($viewrecord) or die(mysql_error());

{
echo "<table border='1' width='100%' style='border:1px solid silver' cellpadding='5px' cellspacing='0px'>
<tr bgcolor='#666666' style='color:#FFFFFF'>
<th>Date Encoded</th>
------------HEADER--------- etc....

-------THERE SHOULD BE A IF STATEMATE HERE-----------------
(where if no records match "dv.dv_id=pr.pr.dv_id". It would still display records from tbl_dv..)

while ($row = mysql_fetch_row($run_viewrecord)) {

if($color==1){
echo "<tr bgcolor='#ffffff'>";
echo "<td align='center'>" .date_format(date_create($row[17]), "m/d/y")."</td>
**--------- I WANT TO DISPLAY THE ROLLS HERE --------------------**
echo "</td></tr>";

$color="2";
}   else {
echo "<tr bgcolor='#ebeaea'>";
echo "<td align='center'>" .date_format(date_create($row[17]), "m/d/y")."</td>
**--------- I WANT TO DISPLAY THE ROLLS HERE --------------------**
echo "</td></tr>";

$color="1";
}
}
echo '</table>';
echo '<td><tr><table><br /><br />';
}
?>

我希望在WHILE之前添加IF语句。 即使在两个table2上都没有匹配的dv_id，它仍将显示记录。 它仍然应该显示记录。。COLUMN ROLLS IF如果不匹配，它将显示0.00值。 链接>> http://i599.photobucket.com/albums/tt79/emcevo/viewphpdisplay_zpsfc6a8174.jpg

Answer 3

您可以通过将PHP中每个记录行的返回值加起来以编程方式进行此操作。

您也可以做类似的事情

 $viewrecord = "SELECT *, (pr.roll1 + pr.roll2 + 
                pr.roll3 + pr.roll4 + pr.roll5 + pr.roll6) as rolls 
 FROM tbl_dv dv LEFT OUTER JOIN tbl_payroll pr on dv.dv_id = pr.dv_id 
 RIGHT OUTER JOIN tbl_payroll pr on dv.dv_id = pr.dv_id 
 WHERE dv.respo='".mysql_real_escape_string($data[0])."' 
 && year(dv.date_added)='$year' && month(dv.date_added)='$month'";