I have 2 mysql tables that are joined, in the database, by the descriptionId field.
dataTable.dataId
dataTable.descriptionId
dataTable.userId
dataTable.value
descriptionLookupTable.descriptionId
descriptionLookupTable.descriptionName
In PHP, I am trying to update the field: dataTable.value, when dataTable.descriptionID = Gender and the dataTable.userId = $_SESSION['userId'].
For example in the descriptionLookupTable: descriptionLookupTable.descriptionId = 1 and descriptionLookupTable.descriptionName = Gender. And in the dataTable: dataTable.descriptionID = 1.
I understand the part that deals with the userID by using:
"WHERE dataTable.userId = '" . $_SESSION['userId'] . "'";
But I can't figure out how to use INNER JOIN.
The following query does not work.
$query = "UPDATE dataTable
INNER JOIN descriptionLookupTable
ON dataTable.descriptionId = descriptionLookupTable.descriptionId
AND descriptionLookupTable.descriptionName = Gender
SET Gender = '$gender' WHERE dataTable.user_id = '" . $_SESSION['user_id'] . "'";
The error message is: Unknown column 'Gender' in 'field list'.
Gender apparently is not a column in your table. One of the field must be named Gender for you to be able to update its content
what about trying to update a field which is in your table :) :
SET dataTable.value = '$gender' WHERE dataTable.user_id = '" . $_SESSION['user_id'] . "'";
descriptionLookupTable.descriptionName = Gender
Gender in this case is a string literal, therefore you have to mark it as such
descriptionLookupTable.descriptionName = 'Gender'
Related
I have set up a query as such:
$query = 'SELECT SGC.sys_id, TBL.semester, SGC.bonus, SGC.exam, SGC.ca FROM SubjectGradeComponent AS SGC, ';
$query .= '(SELECT `sys_id`, `semester` FROM AcademicYearTerm AS AYT, SubjectYearTermLevel AS SYTL WHERE academic_year = "' . $academic_year . '" AND SYTL.subject_id = ' . $subject_id . ' AND SYTL.form_level = ' . $form_level. ' AND SYTL.yearTerm_id = AYT.yearTerm_id) AS TBL ';
$query .= 'WHERE SGC.sys_id = TBL.sys_id;';
However when I run the query, $mysql->query($query);it returns an empty result with 0 rows. Running the same query on phpmyadmin shows the desired result. I have looked around but do not understand the problem.
$mysql->error does not show any error message either
EDIT:
generated query is like this:
SELECT SGC.sys_id, TBL.semester, SGC.bonus, SGC.exam, SGC.ca FROM SubjectGradeComponent AS SGC, (SELECT `sys_id`, `semester` FROM AcademicYearTerm AS AYT, SubjectYearTermLevel AS SYTL WHERE academic_year = "2018-2019" AND SYTL.subject_id = 1 AND SYTL.form_level = 1 AND SYTL.yearTerm_id = AYT.yearTerm_id) AS TBL WHERE SGC.sys_id = TBL.sys_id;""
Question is where are the "" from?
Looks like you want a JOIN query instead.
You should also use prepared statement with placeholders ? instead of injecting values directly into the query.
$query = "SELECT SGC.sys_id,
AYT.semester,
SGC.bonus,
SGC.exam,
SGC.ca
FROM SubjectGradeComponent AS SGC
JOIN AcademicYearTerm AS AYT
ON SGC.sys_id = AYT.sys_id
JOIN SubjectYearTermLevel AS SYTL
ON SYTL.yearTerm_id = AYT.yearTerm_id
WHERE academic_year = ?
AND SYTL.subject_id = ?
AND SYTL.form_level = ?";
I need to update an entire column with new unique phone numbers that live in a second table. I seem to be on the right track... but my loop logic is faulty.
I'm returning the matches correctly as far as I can tell, but when I try to update the entire column in the table it inserts the last phone number in every single row.
$query = "SELECT matched.duns, matched.new_p1, users_data.temp_duns
FROM matched
INNER JOIN users_data ON temp_duns
WHERE temp_duns = duns LIMIT 10";
$result = mysqli_query($connection, $query);
foreach ($result as $key => $val) {
if($val['duns'] === $val['temp_duns']) {
$final_query = "UPDATE users_data SET phone_number = " . $val['new_p1'];
$final_result = mysqli_query($connection, $final_query);
echo $counter . "DUNS From matched: " . $val['duns'] . " DUNS From users_data: " . $val['temp_duns'] . " NEW PHONE: ". $val['new_p1']. "<br>";
}
}
I'm a total newb but any help would be appreciated.
Simply run an update query in one call without looping and in MySQL INNER JOIN can be used:
UPDATE user_data u
INNER JOIN matched m ON u.temp_duns = m.temp_duns
SET u.phone_number = m.new_p1;
Or for the limit of 10:
UPDATE user_data u
INNER JOIN (SELECT * FROM matched LIMIT 10) m ON u.temp_duns = m.temp_duns
SET u.phone_number = m.new_p1;
The problem is that your query doesn't have a WHERE clause, so it's updating every row.
"UPDATE users_data SET phone_number = " . $val['new_p1'];
You need to limit it to just the row that you want to update.
"UPDATE users_data SET phone_number = " . $val['new_p1'] . " WHERE some_id = " . $some_id;
You could probably do the whole thing in a single query.
UPDATE table_to_be_updated
JOIN table_with_value_we_need ON whatever_joins_them
SET table_to_be_updated.column_we_want_to_fill = table_with_value_we_need.value_we_need;
I have two values from URL. This is those,
$_GET['a'] // this variable has a email address
$_GET['b'] // this variable has a code to activate my account.
I am trying to create UPDATE query using these two values, but problem is these two values belong to two different tables. email has in contact table and active column has in user table.
This is my code so far:
$q = "UPDATE tutors SET active = NULL
WHERE (active='" . mysqli_real_escape_string($dbc, $_GET['z']) . "')
LIMIT 1";
This code is working for me. but I need to check both values in WHERE clause. Can anybody help me to build this query?
UPDATE :
$q = "UPDATE tutors t, contact c SET t.active = NULL
WHERE t.active = '" . mysqli_real_escape_string($dbc, $_GET['z']) . "'
AND c.email = '" . mysqli_real_escape_string($dbc, $_GET['y']) . "'
AND t.contact_id = c.contact_id
LIMIT 1";
Thank you.
At a guess: something like this would work if your tutors and contacts are linked via a contact_id in the tutors table.
<?php
$q = "UPDATE tutors T, contacts C SET T.active = NULL
WHERE T.active = '" . mysqli_real_escape_string($dbc, $_GET['z']) . "'
AND C.email = '" . mysqli_real_escape_string($dbc, $_GET['a']) . "'
AND T.contact_id = C.contact_id"
but... I would need more information about your database schema to make this a more precise answer.
I am developing a classroom website.
There is a form to insert student profile/data into the database table student.
This site has 5 class groups, IDs as id= 1, 2, 3, 4, 5.
Inserting data to database table succeeds.
But I have a question: Each student must be under classroom 1 and 2, so when we insert data I need the database to automatically create two database results for each times, both results all field are same data except classgroup_id, i mean one result must classgroup_id=1 and second result must be classgroup_id=2, i need mysql automatically generated this for when add each student... any idea.?
this is my table structure
student_id (int) AI
name
email
classgroup_id (default value=1)
user_id
this is my php code for insert data to table
$this->db->query("INSERT INTO " . DB_PREFIX . "student SET user_id = '" . (int)$this->user->getId() . "', name = '" . $this->db->escape($data['name']) . "', email = '" . $this->db->escape($data['email']) . "'");
thanks... i have only a medium level php knowledge
ClassGroups are in table or just static numbers?
If they are just static numbers, then i think simpliest way is to do another insert with duplicated data. For example for both rows should be:
$this->db->query("INSERT INTO " . DB_PREFIX . "student SET user_id = '" . (int)$this->user->getId() . "', name = '" . $this->db->escape($data['name']) . "', email = '" . $this->db->escape($data['email']) . "'");
$this->db->query("INSERT INTO " . DB_PREFIX . "student SET user_id = '" . (int)$this->user->getId() . "', name = '" . $this->db->escape($data['name']) . "', email = '" . $this->db->escape($data['email']) . "', classgroup_id =2");
If they are in some table, then you can do insert with one insert(code will be shorter) but with different insert syntax then yours. For example your ClassGroup table is just ClassGroups:
$this->db->query("INSERT INTO " . DB_PREFIX . "student (user_id, name, email, ClassGroup_id)
select " . (int)$this->user->getId() . ", '" . $this->db->escape($data['name']) . "', '" . $this->db->escape($data['email']) . "',ClassGroup_id from ClassGroups where ClassGroup_id=1 or ClassGroup_id=2");
But i think it should be best if you do for each data(student, ClassGroup) different table and do relation table for them, it will not duplicate data and table student will be faster if you gather data from it by primary AI key and not by varchar type column name.
You don't need PHP to do this... Pure SQL pseudosolution:
INSERT INTO student (student_id name, email) SELECT name, email from student where classgroup_id = ?
If you construct a fiddle and leave a comment as to where to find said fiddle, I'd be happy to tweak the query for your specific needs.
In order to avoid duplicate entries for students, you can make another table in which you link the students to their classes.
For example:
Students
student_id (primary key)
name
email
user_id (if still needed...)
Classgroups
classgroup_id (primary key)
classgroup_name
StudentsPerClassgroup
student_id (foreign key)
classgroup_id (foreign key)
You have to keep the record in temporary table first and then do the operations .. try it
//get last insertId
$last_insert_id = $this->db->insert_id();
$new_id = $last_insert_id +1;
$query = "CREATE TEMPORARY TABLE tmp SELECT * FROM yourtable WHERE your_primary_key = $last_insert_id;
UPDATE tmp SET your_primary_key= $new_id,classgroup_id = 2 WHERE your_primary_key = $last_insert_id;
INSERT INTO yourTable SELECT * FROM tmp WHERE your_primary_key = new_id";
$this->db->query($query);
Hope you get some idea
Really stuck on something. I'm trying to update a database and the code looks write - and if I echo it out and paste it directly into phpMyAdmin it works perfectly - but the code itself doesn't work... I have spend a day so far trying to figure out why it's not working and I'm completely out of ideas...
function restoreSession()
{
mysql_connect("theHost", "root", "rootPWD") or die(mysql_error());
mysql_select_db("myDatabase") or die(mysql_error());
$restore_cmd = 'UPDATE wp_dor_cart66_sessions SET user_data = (SELECT user_data FROM wp_dor_cart66_stored_sessions WHERE ip_address = "' . $_SERVER['REMOTE_ADDR'] . '")';
$clean_up = "DELETE FROM `wp_dor_cart66_sessions` WHERE `ip_address` = \"" . $_SERVER['REMOTE_ADDR'] . "\" AND id NOT IN (SELECT id FROM ( SELECT id FROM `wp_dor_cart66_sessions` ORDER BY id DESC LIMIT 1 ) user_data )";
mysql_query($clean_up) or die('Query failed: ' . mysql_error());
$result = mysql_query($restore_cmd) or die('Query failed: ' . mysql_error());
echo "<br/>";
echo $restore_cmd;
echo "<br/>";
var_dump($result);
echo "<br/>";
print_r($result);
}
The resulting output looks like:
UPDATE wp_dor_cart66_sessions SET user_data =
(SELECT user_data FROM wp_dor_cart66_stored_sessions
WHERE ip_address = "196.54.110.24");
bool(true)
1
It doesn't appear to have any errors - but I just can't get it to update. If it didn't work in phpMyAdmin - I'd know there was something wrong with the SQL - but it seems right... I'm just really out of ideas - any help would be greatly appreciated!
Here are the statements again with some formatting:
$restore_cmd = '
UPDATE
wp_dor_cart66_sessions
SET
user_data = (
SELECT
user_data
FROM
wp_dor_cart66_stored_sessions
WHERE
ip_address = "' . $_SERVER['REMOTE_ADDR'] . '"
)
';
$clean_up = "
DELETE FROM
`wp_dor_cart66_sessions`
WHERE
`ip_address` = \"" . $_SERVER['REMOTE_ADDR'] . "\"
AND id NOT IN (
SELECT
id
FROM
(
SELECT
id
FROM
`wp_dor_cart66_sessions`
ORDER BY
id DESC
LIMIT
1
) user_data
)
";
$restore_cmd = 'UPDATE wp_dor_cart66_sessions SET user_data = (SELECT user_data FROM wp_dor_cart66_stored_sessions WHERE ip_address = \"' . $_SERVER['REMOTE_ADDR'] . '\")';
need to escape the quotation marks
Looks like quoting error, Try this:
"UPDATE wp_dor_cart66_sessions SET user_data = (SELECT user_data FROM wp_dor_cart66_stored_sessions WHERE ip_address = '" . $_SERVER['REMOTE_ADDR'] . "')";
If could be that you have multiple results in your SELECT.
What if you do ...
$restore_cmd = 'UPDATE wp_dor_cart66_sessions SET user_data = (SELECT user_data FROM wp_dor_cart66_stored_sessions WHERE ip_address = "' . $_SERVER['REMOTE_ADDR'] . '" LIMIT 1)';
... note the LIMIT 1
Are you sure that the first query is not deleting all the matching rows?
I don't understand the "user_data" part at the end of the first query. But I would check the number of affected rows after each query to see if query is doing any affect on data and if it is, is it doing well or there's just some logical mistake.