Php 如何从三个不同的表中查询SELECT总和
希望你们是好人！我有一个很大的问题，选择三个不同的表，并在那里总和，以便我可以得到这三个表的总和。 下表中，我只提到了一些字段： 1：付款Php 如何从三个不同的表中查询SELECT总和,php,mysql,Php,Mysql,希望你们是好人！我有一个很大的问题，选择三个不同的表，并在那里总和，以便我可以得到这三个表的总和。 下表中，我只提到了一些字段： 1：付款 id idnumber school_fee trans_fee 1 va03 10000 20000 2：一次付款 id idnumber school_fee trans_fee 1 va01 10000 30000 <?php //include mysql connect
id idnumber school_fee trans_fee
1 va03 10000 20000
id idnumber school_fee trans_fee
1 va01 10000 30000
<?php
//include mysql connect
if (isset($_GET['query']))
{
$query=$_GET['query'];
// Instructions if $_POST['value'] exist
}
// gets value sent over search form
$min_length = 3;
// you can set minimum length of the query if you want
if(strlen($query) >= $min_length){ // if query length is more or equal minimum
length then
$query = htmlspecialchars($query);
// changes characters used in html to their equivalents, for example: < to >
$query = mysql_real_escape_string($query);
// makes sure nobody uses SQL injection
$raw_results = mysql_query("SELECT
*,SUM(school_fee+trans_fee)
As Total FROM payment_one
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
$raw_results2 = mysql_query("SELECT * FROM payment_one
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
// * means that it selects all fields, you can also write: `id`, `title`, `text`
// articles is the name of our table
// '%$query%' is what we're looking for, % means anything, for example if $query
is Hello
// it will match "hello", "Hello man", "gogohello", if you want exact match use
`title`='$query'
// or if you want to match just full word so "gogohello" is out use '% $query %'
...OR ... '$query %' ... OR ... '% $query'
if(mysql_num_rows($raw_results) > 0){
if(mysql_num_rows($raw_results2) > 0){
// if one or more rows are returned do following
while($results = mysql_fetch_array($raw_results)){
while($results2 = mysql_fetch_array($raw_results2)){
// $results = mysql_fetch_array($raw_results) puts data from database into
array, while it's valid it does the loop
// posts results gotten from database(title and text) you can also show id
($results['id'])
}{
echo " Total amount of money payed by " .$results['class']
." "."class is " . $results ['Total'] . " /=Tshs";
echo"<br>"; echo"<br>";
}
}
}
}
}
?>
id idnumber school_fee trans_fee
1 va02 40000 50000
<?php
//include mysql connect
if (isset($_GET['query']))
{
$query=$_GET['query'];
// Instructions if $_POST['value'] exist
}
// gets value sent over search form
$min_length = 3;
// you can set minimum length of the query if you want
if(strlen($query) >= $min_length){ // if query length is more or equal minimum
length then
$query = htmlspecialchars($query);
// changes characters used in html to their equivalents, for example: < to >
$query = mysql_real_escape_string($query);
// makes sure nobody uses SQL injection
$raw_results = mysql_query("SELECT
*,SUM(school_fee+trans_fee)
As Total FROM payment_two
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
$raw_results2 = mysql_query("SELECT * FROM payment_two
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
// * means that it selects all fields, you can also write: `id`, `title`, `text`
// articles is the name of our table
// '%$query%' is what we're looking for, % means anything, for example if $query
is Hello
// it will match "hello", "Hello man", "gogohello", if you want exact match use
`title`='$query'
// or if you want to match just full word so "gogohello" is out use '% $query %'
...OR ... '$query %' ... OR ... '% $query'
if(mysql_num_rows($raw_results) > 0){
if(mysql_num_rows($raw_results2) > 0){
// if one or more rows are returned do following
while($results = mysql_fetch_array($raw_results)){
while($results2 = mysql_fetch_array($raw_results2)){
// $results = mysql_fetch_array($raw_results) puts data from database into
array, while it's valid it does the loop
// posts results gotten from database(title and text) you can also show id
($results['id'])
}{
echo " Total amount of money payed by " .$results['class']
." "."class is " . $results ['Total'] . " /=Tshs";
echo"<br>"; echo"<br>";
}
}
}
}
}
?>
<?php
//include mysql connect
if (isset($_GET['query']))
{
$query=$_GET['query'];
// Instructions if $_POST['value'] exist
}
// gets value sent over search form
$min_length = 3;
// you can set minimum length of the query if you want
if(strlen($query) >= $min_length){ // if query length is more or equal minimum
length then
$query = htmlspecialchars($query);
// changes characters used in html to their equivalents, for example: < to >
$query = mysql_real_escape_string($query);
// makes sure nobody uses SQL injection
$raw_results = mysql_query("SELECT
*,SUM(school_fee+trans_fee)
As Total FROM payment
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
$raw_results2 = mysql_query("SELECT * FROM payment
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
// * means that it selects all fields, you can also write: `id`, `title`, `text`
// articles is the name of our table
// '%$query%' is what we're looking for, % means anything, for example if $query
is Hello
// it will match "hello", "Hello man", "gogohello", if you want exact match use
`title`='$query'
// or if you want to match just full word so "gogohello" is out use '% $query %'
...OR ... '$query %' ... OR ... '% $query'
if(mysql_num_rows($raw_results) > 0){
if(mysql_num_rows($raw_results2) > 0){
// if one or more rows are returned do following
while($results = mysql_fetch_array($raw_results)){
while($results2 = mysql_fetch_array($raw_results2)){
// $results = mysql_fetch_array($raw_results) puts data from database into
array, while it's valid it does the loop
// posts results gotten from database(title and text) you can also show id
($results['id'])
}{
echo " Total amount of money payed by " .$results['class']
." "."class is " . $results ['Total'] . " /=Tshs";
echo"<br>"; echo"<br>";
}
}
}
}
}
?>
id idnumber school_fee trans_fee
1 va01 10000 30000
<?php
//include mysql connect
if (isset($_GET['query']))
{
$query=$_GET['query'];
// Instructions if $_POST['value'] exist
}
// gets value sent over search form
$min_length = 3;
// you can set minimum length of the query if you want
if(strlen($query) >= $min_length){ // if query length is more or equal minimum
length then
$query = htmlspecialchars($query);
// changes characters used in html to their equivalents, for example: < to >
$query = mysql_real_escape_string($query);
// makes sure nobody uses SQL injection
$raw_results = mysql_query("SELECT
*,SUM(school_fee+trans_fee)
As Total FROM payment_one
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
$raw_results2 = mysql_query("SELECT * FROM payment_one
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
// * means that it selects all fields, you can also write: `id`, `title`, `text`
// articles is the name of our table
// '%$query%' is what we're looking for, % means anything, for example if $query
is Hello
// it will match "hello", "Hello man", "gogohello", if you want exact match use
`title`='$query'
// or if you want to match just full word so "gogohello" is out use '% $query %'
...OR ... '$query %' ... OR ... '% $query'
if(mysql_num_rows($raw_results) > 0){
if(mysql_num_rows($raw_results2) > 0){
// if one or more rows are returned do following
while($results = mysql_fetch_array($raw_results)){
while($results2 = mysql_fetch_array($raw_results2)){
// $results = mysql_fetch_array($raw_results) puts data from database into
array, while it's valid it does the loop
// posts results gotten from database(title and text) you can also show id
($results['id'])
}{
echo " Total amount of money payed by " .$results['class']
." "."class is " . $results ['Total'] . " /=Tshs";
echo"<br>"; echo"<br>";
}
}
}
}
}
?>
id idnumber school_fee trans_fee
1 va02 40000 50000
<?php
//include mysql connect
if (isset($_GET['query']))
{
$query=$_GET['query'];
// Instructions if $_POST['value'] exist
}
// gets value sent over search form
$min_length = 3;
// you can set minimum length of the query if you want
if(strlen($query) >= $min_length){ // if query length is more or equal minimum
length then
$query = htmlspecialchars($query);
// changes characters used in html to their equivalents, for example: < to >
$query = mysql_real_escape_string($query);
// makes sure nobody uses SQL injection
$raw_results = mysql_query("SELECT
*,SUM(school_fee+trans_fee)
As Total FROM payment_two
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
$raw_results2 = mysql_query("SELECT * FROM payment_two
WHERE (`class` LIKE '%".$query."%')") or die(mysql_error());
// * means that it selects all fields, you can also write: `id`, `title`, `text`
// articles is the name of our table
// '%$query%' is what we're looking for, % means anything, for example if $query
is Hello
// it will match "hello", "Hello man", "gogohello", if you want exact match use
`title`='$query'
// or if you want to match just full word so "gogohello" is out use '% $query %'
...OR ... '$query %' ... OR ... '% $query'
if(mysql_num_rows($raw_results) > 0){
if(mysql_num_rows($raw_results2) > 0){
// if one or more rows are returned do following
while($results = mysql_fetch_array($raw_results)){
while($results2 = mysql_fetch_array($raw_results2)){
// $results = mysql_fetch_array($raw_results) puts data from database into
array, while it's valid it does the loop
// posts results gotten from database(title and text) you can also show id
($results['id'])
}{
echo " Total amount of money payed by " .$results['class']
." "."class is " . $results ['Total'] . " /=Tshs";
echo"<br>"; echo"<br>";
}
}
}
}
}
?>
任何帮助我都会感激的 如果我理解正确，您的三个表[payment][payment\u one][payment\u two]都有相同的列：id、idnumber、school\u fee trans\u fee 您可以使用一个单独的表，并通过引入一个新列（tablenum）来区分它们，这样就可以很容易地获得所需的内容。请注意，[id]和[tablenum]现在都是主键复合主键 新的表架构和数据将被删除。我不太确定idnumber列的用途：
[payment]
id tablenum idnumber school_fee trans_fee
1 0 va03 10000 20000
1 1 va01 10000 30000
1 2 va02 40000 50000
SELECT
school_fee,
trans_fee,
(school_fee + trans_fee) as 'total'
FROM payment WHERE id=1
如果我理解正确，您的三个表[payment][payment\u one][payment\u two]都有相同的列：id、idnumber、school\u fee trans\u fee 您可以使用一个单独的表，并通过引入一个新列（tablenum）来区分它们，这样就可以很容易地获得所需的内容。请注意，[id]和[tablenum]现在都是主键复合主键 新的表架构和数据将被删除。我不太确定idnumber列的用途：
[payment]
id tablenum idnumber school_fee trans_fee
1 0 va03 10000 20000
1 1 va01 10000 30000
1 2 va02 40000 50000
SELECT
school_fee,
trans_fee,
(school_fee + trans_fee) as 'total'
FROM payment WHERE id=1
在新代码中，它们是。您是否意识到，除了查询payment、payment\u one和payment\u two中提到的表名之外，您发布的三个脚本完全相同？另外，在我看来，拥有三个这样的表是一个非常糟糕的主意，除非您使用的是一个遗留的预先存在的数据库-在这种情况下，我会使用一个视图表来统一它们，真的。耶！是一样的。除了表名之外，您应该仔细阅读规范化的基础知识，并发现如果您将数据库修复为至少第二个标准形式，那么这个问题就很简单了。在新代码中，它们是。您是否意识到，除了查询payment、payment\u one和payment\u two中提到的表名之外，您发布的三个脚本完全相同？另外，在我看来，拥有三个这样的表是一个非常糟糕的主意，除非您使用的是一个遗留的预先存在的数据库-在这种情况下，我会使用一个视图表来统一它们，真的。耶！是一样的。除了表名之外，您应该阅读规范化的基础知识，发现如果您将数据库修复为至少第二个标准形式，那么这个问题很小。因此，这将带来总计，注意：这些表是单独的，因为每个类的费用不同，是的，这个统一的表应该满足您的需要，避免重复代码。idnumber是学生号，每个班级的费用不同，付款表上有婴儿班的费用，付款一是标准一费，付款二是标准二费，因此，现在需要获取所有课程费用的总和。“tablenum”列用于为您标识不同的课程，值0表示您的原始[payment]表，值1表示您的[payment\u one]，值2表示您的[payment\u two]。因此，现在使用这个新模式，您只需要一个表，这使您的代码更加简单和干净。tablenum colum是自动递增的，还是？那么，这将带来总计，注意：这些表是单独的，因为每个类有不同的费用，是的，这个统一的表应该满足您的需要，避免重复代码。idnumber是学生号，每个班级的费用不同，付款表上有婴儿班的费用，付款一是标准一费，付款二是标准二费，因此，现在需要获取所有课程费用的总和。“tablenum”列用于为您标识不同的课程，值0表示您的原始[payment]表，值1表示您的[payment\u one]，值2表示您的[payment\u two]。所以现在使用这个新模式，您只需要一个表，这使您的代码更加简单和干净？