I want to do a simple SQL query in Drupal, but I'm not sure how. I would like to achieve this:
SELECT COUNT(nid) AS i_count FROM node WHERE `created` != `changed`;
I have the following code, which doesn't work:
$query = db_select('node', 'n');
$query->addExpression("COUNT(nid)","i_count");
$query->condition("created","changed","!=");
$i_number_published = $query->execute()->fetchCol();
The reason why it doesn't work is that it compares the column created with the string value "changed". Is there any way I can tell it to compare columns instead of column-string?
Use the where() member function to add conditions based on other fields in the table:
$query = db_select('node', 'n');
$query->addExpression("COUNT(nid)","i_count");
$query->where("created != changed");
$i_number_published = $query->execute()->fetchCol();
$result_handler = db_query("select count(nid) from {node} where `created` != `changed`") ;
$result_arr = db_fetch_array($result_handler) ;
$number_of_nodes = $result_arr['count(nid)'] ;
Related
Really new to working with CI4's Model and struggling to adapt my existing MySQL JOIN queries to work with the examples in its User Guide.
I have adapted part of my code like so:
public function brand_name($brand_name_slug)
{
return $this->asArray()
->where('availability', 'in stock')
->where('sku !=', '')
->where('brand_name_slug', $brand_name_slug)
->groupBy('gtin')
->orderBy('brand_name, subbrand_name, product, size, unit')
->findAll();
}
It works fine. I have looked at examples, and figured out I can add the code ->table('shop a') and it still works, but I also need to to add the following JOIN statement:
JOIN (SELECT gtin, MIN(sale_price) AS sale_price FROM shop GROUP BY gtin) AS b ON a.gtin = b.gtin AND a.sale_price = b.sale_price
As soon as I add ->join('shop b', 'a.gtin = b.gtin and a.sale_price = b.sale_price') I get a '404 - File Not Found' error.
When I look at all examples of CI4 joins and adapt my code to fit, my foreach($shop as $row) loop generates a 'Whoops...' error because they end with a getResult() or getResultArray - instead of findAll().
Which is the way forward, and do I need to change my foreach loop.
Full MySQL statement:
SELECT * FROM shop a JOIN (SELECT gtin, MIN(sale_price) AS sale_price FROM shop GROUP BY gtin) AS b ON a.gtin = b.gtin AND a.sale_price = b.sale_price WHERE availability = 'in stock' AND sku != '' AND brand_name_slug = $brand_name_slug GROUP BY gtin ORDER BY brand_name, subbrand_name, product, size
Query builders have their limits. That's why the query method exists. If you have a complex query I'd advise you to just use $this->query();.
It will make you lose less time and effort converting something you know already works. And in the top of that, while converting complex queries you usually end up using the query builder but with big part of your SQL in it.
In your model extending CodeIgniter\Model :
$query = $this->db->query("SELECT * FROM shop a JOIN (SELECT gtin, MIN(sale_price) AS sale_price FROM shop GROUP BY gtin) AS b ON a.gtin = b.gtin AND a.sale_price = b.sale_price WHERE availability = 'in stock' AND sku != '' AND brand_name_slug = \$brand_name_slug GROUP BY gtin ORDER BY brand_name, subbrand_name, product, size");
// your array result
$result_array = $query->getResultArray();
// your object result
$result_object = $query->getResult();
BaseBuilder Class in Codeigniter expects the first join parameter to be the table name. So try passing the table name and join it on the table name itself. I haven't personally used the table aliases so I might also be wrong.
Following are the parameter that the JOIN query expects :
public function join(string $table, string $cond, string $type = '', bool $escape = null)
Here, it expects the first name be a table, so try out by switching aliases for the table's name directly.
For your second part of query, It would be better if you could show the whole error rather than just posting the first of the error.
Managed to figure it out in the end:
public function brand_name($brand_name_slug)
{
return $this
->db
->table('shop a')
->select()
->join('(SELECT sku, MIN(sale_price) AS sale_price FROM shop GROUP BY sku) AS b', 'a.sku = b.sku AND a.sale_price = b.sale_price')
->where('availability', 'in stock')
->where('a.sku !=', '')
->where('brand_name_slug', $brand_name_slug)
->groupBy('a.sku')
->orderBy('brand_name, subbrand_name, product, size, unit')
->get()
->getResult();
}
Thanks for all your pointers!
How to update mysql data in bulk ?
How to define something like this :
UPDATE `table`
WHERE `column1` = somevalues
SET `column2` = othervalues
with somevalues like :
VALUES
('160009'),
('160010'),
('160011');
and othervalues :
VALUES
('val1'),
('val2'),
('val3');
maybe it's impossible with mysql ?
a php script ?
The easiest solution in your case is to use ON DUPLICATE KEY UPDATE construction. It works really fast, and does the job in easy way.
INSERT into `table` (id, fruit)
VALUES (1, 'apple'), (2, 'orange'), (3, 'peach')
ON DUPLICATE KEY UPDATE fruit = VALUES(fruit);
or to use CASE construction
UPDATE table
SET column2 = (CASE column1 WHEN 1 THEN 'val1'
WHEN 2 THEN 'val2'
WHEN 3 THEN 'val3'
END)
WHERE column1 IN(1, 2 ,3);
If the "bulk" data you have is dynamic and is coming from PHP (you did tag it, after all), then the query would look something like this:
INSERT INTO `foo` (id, bar)
VALUES
(1, 'pineapple'),
(2, 'asian pear'),
(5, 'peach')
ON DUPLICATE KEY UPDATE bar = VALUES(bar);
and the PHP to generate this from an existing array (assuming the array is of a format like:
$array = (
somevalues_key => othervalues_value
);
) would look something like this (by no means the best (doesn't address escaping or sanitizing the values, for instance), just an quick example):
$pairs = array();
foreach ($array as $key => $value) {
$pairs[] = "($key, '$value')";
}
$query = "INSERT INTO `foo` (id, bar) VALUES " . implode(', ', $pairs) . " ON DUPLICATE KEY UPDATE bar = VALUES(bar)";
You could try an UPDATE with JOIN as below:
UPDATE table
INNER JOIN (
SELECT 1 column1, 2 column2, 10 new_v1, 20 new_v2, 30 new_v3
UNION ALL SELECT 4 column1, 5 column2, 40 new_v1, 50 new_v2, 60 new_v3
) updates
ON table.column1 = updates.column1
AND table.column2 = updates.column2
SET
table.column1 = updates.new_v1,
table.column2 = updates.new_v2,
table.column3 = updates.new_v3;
As long as you can craft the inner SELECT statements from the updates subquery you would get the benefit of running all these updates in a single statement (which should give you some performance boost on InnoDB depending on your table size).
If you are using a drag & drop tableView or collectionView to sort datas in your app, like allowing users to arrange their photos by drag and drop functionality, send a comma seperated list of ordered ids to the backend after user edits finish.
In your backend, explode ids to the an array like
$new_ranks = array();
$supplied_orders = explode(",", $_POST["supplied_new_order"]); //52,11,6,54,2 etc
$start_order = 99999;
foreach ($supplied_orders as $supplied_row_id) {
//your all validations... make sure supplied_row_id belongs to that user or not etc..
$new_ranks[intval($supplied_row_id)] = $start_order--;
}
now, you can update all new ranks like #Farside recommendation 2.
if (count($new_ranks) > 0) {
$case_sqls = array();
foreach ($new_ranks as $id => $rank) {
$case_sqls[] = "WHEN ".intval($id)." THEN ".intval($rank)."";
}
$case_sql = implode(" ", $case_sqls);
$this->db->query("
UPDATE
service_user_medias
SET
rank = (CASE id ".$case_sql." END)
WHERE
id IN(".implode(",", array_keys($new_ranks)).");
");
}
If you have data in array format then try this
and your query is like "UPDATE table WHERE column1 = ? SET column2 = ?"
then set it like below
foreach($data as $key => $value) {
$query->bind_param('ss', $key, $value);
$query->execute();
}
hope it'll work.
Reference from this.
I'm using $this->db->update(); to create an update query that adds the value stored in a variable, $amount, to the value in a column, count. My function call currently looks like this:
$data = array('count' => 'count + '.$amount);
$this->db->where('id', $item_id);
$this->db->update('items', $data);
However, this generates the following broken SQL:
UPDATE `items` SET `count` = 'count + 2' WHERE `id` = '2'
Is there a way to generate the SET clause without the quotes around count + 2?
Thanks, Maxime Morin, for putting me on the right track. According to the CodeIgniter Documentation, you can create a "set" clause without quotes by setting the optional $escape parameter to FALSE. Thus, the solution to my problem was:
$this->db->set("count", "count + $amount", FALSE);
$this->db->where("id", $item_id);
$this->db->update("items", $data);
Here's the work-around I used until I found my accepted solution
$query = $this->db->query("UPDATE `items` SET `count` = `count` + $amount WHERE `id` = $item_id");
I have simple query:
$table_name = 'v_c_holi_2012';
$STH_h3 = $DBH_R->query("SELECT DATE(date_time) AS day_h
FROM `$table_name`
");
and it is working ok.
But I must do this query with table name and when I try this:
$table_name = 'v_c_holi_2012';
$STH_h3 = $DBH_R->query("SELECT `$table_name`.DATE(date_time) AS day_h
FROM `$table_name`
");
or
$table_name = 'v_c_holi_2012';
$STH_h3 = $DBH_R->query("SELECT v_c_holi_2012.DATE(date_time) AS day_h
FROM `$table_name`
");
this is not working (Fatal error: Call to a member function fetch_assoc() on a non-object).
What I 'm doing wrong?
The date function should not have the table prefix since it is a system function.
Instead you need to put the table alias before your field date($table_name.date_time).
By the way, you don't need to if you select from only one table.
I believe $table_name.DATE(date_time) should be DATE($table_name.date_time)
You should apply the table name to the thing that's in the table (i.e. the field name), not the DATE function (which has nothing to do with your table).
i.e.
$table_name = 'v_c_holi_2012';
$STH_h3 = $DBH_R->query(
"SELECT DATE(`$table_name`.`date_time`) AS `day_h`
FROM `$table_name`"
);
I just want somthing like this:
select SUM(*) from `mytable` group by `year`
any suggestion?
(I am using Zend Framework; if you have a suggestion using ZF rather than pure query would be great!)
Update: I have a mass of columns in table and i do not want to write their name down one by one.
No Idea??
SELECT SUM(column1) + SUM(column2) + SUM(columnN)
FROM mytable
GROUP BY year
Using the Zend Framework's Zend_Db_Select, your query might look like
$db = Zend_Db::factory( ...options... );
$select = $db->select()
->from('mytable', array('sum1' => 'SUM(`col1`)', 'sum2' => 'SUM(col2)')
->group('year');
$stmt = $select->query();
$result = $stmt->fetchAll();
Refer to the Zend_Db_Select documentation in the ZF manual for more.
EDIT: My bad, I think I misunderstood your question. The query above will return each colum summed, but not the sum of all of the columns. Rewriting Maxem's query so that you can use it with a Zend Framework DB adapter, it might look like
$sql = '<insert Maxem's query here>';
$result = $db->fetchAll($sql);
You might choose to use fetchCol() to retrieve the single result.
It sounds like you don't want to explicitly enumerate the columnn and that you want to sum all the columns (probably excluding the year column) over all the rows, with grouping by year.
Note that the method Zend_Db_Table::info(Zend_Db_Table_Abstract::COLS) will return an array containing the columns names for the underlying table. You could build your query using that array, something like the following:
Zend_Db_Table::setDefaultAdapter($db);
$table = new Zend_Db_Table('mytable');
$fields = $table->info(Zend_Db_Table_Abstract::COLS);
unset($fields['year']);
$select = $table->select();
$cols = array();
foreach ($fields as $field){
$cols[] = sprintf('SUM(%s)', $field);
}
$select->cols(implode(' + ', $cols));
$select->group('year');
I have not tested the specific syntax, but the core of the idea is the call to info() to get the fields dynamically.
Done in ZF rather than pure query and you don't have to write the name of the columns one by one.
(I assume you are extending Zend_Db_Table_Abstract)
If you're asking how to write
select SUM(*) from `mytable` group by `year`
This is how it is done:
public function sumOfAllFields(){
return $this->fetchAll( $this->select()->from('mytable','SUM(*)')->group('year') )->toArray();
}
Or not using Zend...
function mysql_cols($table){
$sql="SHOW COLUMNS FROM `".$table."`";
$res=mysql_query($sql);
$cols=array();
while($row=mysql_fetch_assoc($res))$cols[]=$row['Field'];
return $cols;
}
$cols=mysql_cols("mytable");
$select_sql=array();
foreach($cols as $col){
$select_sql[]="SUM(`".$col."`)";
}
$select_sql=implode('+',$select_sql);
$sql="select (".$select_sql.") from `mytable` group by `year`";