I would like to start from an example: you received some list with needed fields. This list may vary and even if it is empty, select all fields. This list can include fields from several tables. Is there any way to generate SELECT query for doing this?
Probably there is a way, but it will look like parsing received list, adding appropriate table alias, and then adding modified list into select clause. Is it best way actually?
Update 1
The goal is only to get passed fields from several tables, not to
control result from any of them(its about first answer)
You could create a query that first selects dynamically fields, depending on your criteria.
for example lets assume you have two criteria passed to you. Then (after you have made sure your criteria1 and criteria2 are safe):
$mySelect = ''; //placeholder so that you can add select fields
$extraTables = ''; //placeholder to put the extra tables I may need
$criteria = " WHERE 1 "; //this will select everything
if ($criteria1>'') {
$mySelect .= ' , t3.field3 ';
$extraTables = " , aDifferentTable AS t3";
$criteria .= " AND t3.someKey = t1.someKey '";
$criteria .= " AND field_crit1 = '" . $criteria1 . "'";
}
//and an example of connecting dynamically to an other table
if ($criteria2>'') {
$mySelect .= ' , t2.field5 ';
$extraTables = " , anOtherTable AS t2";
$criteria .= " AND t2.someKey = t1.someKey '";
$criteria .= " AND t2.field_crit2 = '" . $criteria2 . "'";
}
//lets combine all together into one dynamically created query
$myquery = "SELECT t1.something " . $mySelect . " FROM myTable AS t1";
$myquery = $myqury . $extraTables . $criteria;
Related
I have a table in Database PhpMyAdmin with certain values, and I want to UPDATE only ONE value of these, WHERE the latest initial_date (TIMESTAMP) is.
I write down here the code I generated as an example, so you can see I actually obtain that date value through SELECT, but I don't manage to UPDATE it. Thank you very much.
$select = "SELECT MAX(initial_date) AS max_value FROM services WHERE matricula = '" . $_POST["taxi"] . "'";
$select_results = mysqli_query($conexion, $select);
while($row = mysqli_fetch_array($select_results)){
echo $row['max_value'];
$update_carrera = "UPDATE services SET";
$update_carrera .= " costo_carrera = costo_carrera + " . $_POST["costo_carrera"] . ",";
$update_carrera .= " final_date = CURRENT_TIMESTAMP";
$update_carrera .= " WHERE initial_date = ''";
$update_carrera_results = mysqli_query($conexion, $update_carrera);
}
I leave WHERE initial_date = '' empty so you can tell what should it be. I get a correct date value in the echo $row['max_value']; if I solve the WHERE with a WHERE initial_date = '20160405153315' (INTEGER), but I don't want to put myself the integer, of course I want to get the newest date from the table database.
I need to set up a SQL query with multiple parameters that are being pulled from the URL. So far I can only get it to work with the there is only one item in the URL.
My default query to pull in all the content
$sql = "SELECT ";
$sql .= "* ";
$sql .= "FROM ";
$sql .= "cms_site_content ";
$sql .= "WHERE ";
$sql .= "1";
I then check if anything was passed through the URL and retrieve it.
if (isset($_GET["d"])) {
$d=$_GET["d"];
Inside the if statement, I break the values passed as "d" into separate items
$newD = explode(',',$d);
$countD = count($newD);
foreach($newD as $discipline) {
if ($countD == 1) {
$sql .= " AND";
$sql .= " discipline='".$discipline."'";
}
My problem is getting the SQL to work if there is more than one discipline value. It should read something like this:
SELECT * FROM cms_site_content WHERE 1 AND discipline="value"
however if there's more than one discipline value, it should read:
SELECT * FROM cms_site_content WHERE 1 AND discipline="value OR discipline="value2" OR discipline="value3"
Is there a more efficient way to write this? I can't figure out how to insert the OR into the foreach statement.
Save all discipline values in an array;
$discipline_arr = array();
foreach($newD as $discipline) {
$discipline_arr[] = $discipline;
// by the way, don't forget to escape for sql injection
// mysql_escape_string is the depracated one, u can use that if u have no
// other choice
}
Then in your sql, add them as discipline in ('value1','value2', 'etc ...') condition (that is for strings, for numeric types it would be like discipline in (1,2,3,4, etc)
$sql = " SELECT * FROM cms_site_content WHERE 1 " .
(empty($discipline_arr) ? "" : "and
discipline in ('". implode("','" , $discipline_arr). "') ") ;
Link to escaping
http://tr1.php.net/manual/en/function.mysql-escape-string.php
Assuming the rest of your query is in tact. Simply store all of your discipline values in an array as follows, then feed the $discipline_string to your $sql query:
$discipline_ary = array('option1', 'option2', 'option3');
$discipline_string = "";
for($i=0; $i < count($discipline_ary); $i++){
$discipline_string .= " discipline = '" . $discipline[$i] . "' ";
if($i+1 == count($discipline_ary)){
break;
}else{
$discipline_string .= " OR "
}
}
So I have to add a WHERE query to this plugin I'm using for a reporting feature on a WordPress site. I have no time to do anything but add in another column and filter by the values in that column as there is not that much data to manage each update. The default value for the column I added is zero but I'll add new entries to represent years new people are added. However, when I filter based on the column value the whole query breaks and doesn't show up. I have no idea why. Here is the section involving its set up query displaying results.
<?php
$sql = "SELECT COUNT(*) FROM " . $wpdb->prefix . "presidentsreport_breakdown WHERE list_id = " . $atts['list_id'];
$total_breakdowns = $wpdb->get_var($sql);
$sql = "SELECT p.person_id, p.name, p.notes, p.school_year, b.breakdown_id, b.name as breakdown, b.description as breakdown_description FROM " . $wpdb->prefix . "presidentsreport_person p INNER JOIN " . $wpdb->prefix . "presidentsreport_breakdown b ON b.breakdown_id = p.breakdown_id INNER JOIN " . $wpdb->prefix . "presidentsreport_list l ON l.list_id = b.list_id";
$clean_where = " WHERE l.list_id = " . $atts['list_id'];
$where = "";
if($search != ''){
$where = " AND (p.name LIKE %s)";
$arg = '%' . $search . '%';
$args = array($arg);
}
$where = $wpdb->prepare($where, $args);
$order = " ORDER BY b.sort_order, b.breakdown_id, p.sort_name, p.name, p.person_id";
$results = $wpdb->get_results($sql . $clean_where . $where . $order);
?>
If I add anything in the variable $where it breaks the whole query. So if I add
<?php
$where = " WHERE p.school_year <= 2011";
?>
or
<?php
$where = " WHERE p.school_year = 0";
?>
Nothing will show up, For the last example if the default value is 0 everything should show up regardless. Thanks in advance for reading through!
Don't add WHERE to your variable. It is already assigned in $clean_where
$clean_where = " WHERE l.list_id = " . $atts['list_id'];
Here ------------^
You need to concatenate your addition parameters to the $where variable:
$where .= " AND p.school_year <= 2011";
There's no need of WHERE in where!
I have a database of records that have a timestamp asscoiated with them. I would like to pull records from the database grouped by day, so if there are other records with the same date (24 hour span) I would like them to be grouped together. Can this be done with MYSQL or will I have to pull the records and organise them into arrays using PHP?
Here is a screenshot of my table:
Here is my model function so far:
public function getUsersMoves($options) {
$query = "SELECT * FROM myzone_user_hr_records";
if(isset($options['GUID'])) {
$query .= " WHERE GUID = '" . $options['GUID'] . "'";
}
if((isset($options['minHR'])) && isset($options['maxHR'])) {
$query .= " AND (hr BETWEEN '" . (int)$options['minHR'] . "' AND '" . (int)$options['maxHR'] . "')";
} else if (isset($options['zone'])) {
$query .= " AND zone = '" . (int)$options['zone'] . "'";
}
if(isset($options['activity'])) {
$query .= " AND title = '" . $options['activity'] . "'";
}
$query .= " ORDER BY time DESC";
$query = $this->db->query($query);
return $query->result_array();
}
And my controller code:
$moves = $this->myzone_model->getUsersMoves($options);
I want the data sorted so that these records are grouped together if they have the same date in the timestamp, for example (2012-11-20).
Thanks
try this :
SELECT *, DATE(time) AS date FROM [whatever you want] GROUP BY date
select * from TABLE where `time` like '2012-11-20%'
The option I have suggested works because the LIKE condition in the WHERE selects all dates from the time field that start with 2012-11-20. That means that it doesn't matter what time it is during the day, it will return all results for that day.
To make this work, you must remember to use LIKE and then add the wildcard at the end - %. You can also add the wildcard at the beginning if you wanted. An example to return all days (11th December) for multiple years would be:
SELECT * FROM TABLE WHERE `time` like '%-12-11%'
I'm learning PHP and Zend Framework. The following PHP function is supposed to fill a temporary table using "INSERT INTO ... SELECT" style query. However, when I SELECT * from the newly appended table, I see that most but not all of the new records have been duplicated once. I have deleted the contents of the table each time I run this scripts. Anyone know why there would be duplicates?
public function fillTableByOfficeName($officeName) {
if ($officeName != '') {
$officePhrase = "b.oof_name ='" . $officeName . "' AND ";
} else {
$officePhrase = '';
}
$whereAddenda = $officePhrase .
"a.fil_bool_will_file_online = false AND " .
"a.fil_bool_confirmed = false AND " .
"a.fil_bool_duplicate = false AND " .
"a.fil_bool_not_found = false AND " .
"(a.fil_res_id_fk NOT IN (4,7,10) OR a.fil_res_id_fk IS NULL) AND " .
"a.fil_will_recorder_rec_id IS NULL AND " .
"d.tag_description NOT IN (
'Already a trust client',
'Not received from local office',
'Southtrust client (already centralized)')";
//"a.fil_date_of_transfer_to_will_recorder IS NULL";
$sql = "INSERT INTO adds(fil_id,REC_ID,FIRST_NAME,LAST_NAME,MIDDLE_INITIAL,SSN," .
"MAILING_ADDRESS_1,MAILING_ADDRESS_2,CITY,STATE,ZIP_CODE,PHONE_NUMBER,BIRTH_DATE," .
"ORIGINATION_OFFICE,FILE_LOCATION,WILL_DATE,LAST_CODICIL_DATE,TRUST_DATE,REV_TRUST,POA_DATE) " .
"SELECT a.fil_id_pk, " .
"a.fil_will_recorder_rec_id, " .
"a.fil_first_name, " .
"a.fil_last_name, " .
"a.fil_middle_name, " .
"a.fil_ssn, " .
"a.fil_mailing_address_1, " .
"a.fil_mailing_address_2, " .
"a.fil_city_address, " .
"a.fil_state_address, " .
"a.fil_zip_code_fk, " .
"a.fil_phone_number, " .
"a.fil_date_of_birth, " .
"b.oof_name, " .
"a.fil_box_id_fk, " .
"a.fil_date_of_will, " .
"a.fil_date_of_last_codicil, " .
"a.fil_date_of_trust, " .
"a.fil_notes, " .
"a.fil_date_of_poa " .
"FROM files a, origination_offices b, nn_files_tags c, tags d " .
"WHERE " .
"a.fil_oof_id_fk = b.oof_id_pk AND " .
"a.fil_id_pk = c.fil_id_fk AND " .
"d.tag_id_pk = c.tag_id_fk AND " .
$whereAddenda;
$this->getAdapter()->query($sql);
return $this;
}
The way you are joining the table will give you the cartesian product of the rows from the tables (all pairs of matching rows are returned).
With no specific knowledge of the domain, I would guess at the tags table - if you've got multiple tags for a particular file, you will get multiple copies of the file in your result set (one per each matched tag).
As you're not using tags fields in the result set, just the where clause, the solution would be to get rid of tags / nn_files_tags from the main query, and in your where clause, use NOT EXISTS to check for matching rows in the tags table, something like:
AND NOT EXISTS (SELECT tag_id_pk FROM tags WHERE tags.tag_id_pk ...
You are using C for a many to many relationship. For example, if you have invoices between companies and customers and you select from join of them, you will get as many rows as you have invoices. From that, if you only select the company name and costumer name, you will have many duplicates because the same pair has produced many invoices.
This is the same issue you have here.
As asc99c said, you could use an inner select to make your WHERE clause without joining on that relationship or you could use the DISTINCT key word (which effectively is a group by on everything in your SELECT clause). I would think the INNER SELECT solution more efficient (yet I could be totally wrong about that), but the DISTINCT way is 8 key press away...