I hope someone can help me, i'm writing a custom query in my repository and i'd like to do the below:-
$query = $this->_em->createQueryBuilder()
->select('a')
->from('entity', 'a')
->where('a.deleted not 1') /// how do you write NOT??? i've tried <> etc
->getQuery();
How do i perform the above?
Thanks
Andrew
Francesco's answer is correct. It all depends on your will to use either the expression builder or a high level solution.
For your particular case you can choose one of the two.
Expression builder:
$queryBuilder = $this->_em->createQueryBuilder();
$expr = $queryBuilder->expr();
$query = $queryBuilder
->select('a')
->from('entity', 'a')
->where($expr->neq('a.deleted', 1))
->getQuery();
For high level solution see Rawkode's answer. Except changing the != to <> or using a.deleted = 0.
Better yet would be parametrizing this with Doctrine
->where('a.deleted = :deleted')
->setParameter('deleted', false);
Just use neq() like in the following example:
$query = $repository->createQueryBuilder('t');
$expr = $query->expr();
$orx = $expr->orX();
$orx->add($expr->neq('t.pageTitle', $expr->literal('value1')));
$orx->add($expr->neq('t.metaDescription', $expr->literal('value2')));
$query->andWhere($orx);
The above code produces:
AND (
t1_.page_title <> 'value1'
OR t1_.meta_description <> 'value2'
)
$query = $this->_em->createQueryBuilder()
->select('a')
->from('entity', 'a')
->where('a.deleted != 1') /// how do you write NOT??? i've tried <> etc
->getQuery();
'!=' means not equal
!= means not equal to
!=== means not identical to
$queryBuilder = $repository->createQueryBuilder('a');
$query = $queryBuilder
->where($queryBuilder->expr()->notIn('u.id', 1)
->getQuery();
I'm not sure about not equal operator in query building. But, this may help you.
BTW, I'm also looking for better answer.
Related
What is the correct syntax to write sql like this squeryl:
select *
from table
where
(colA = 'value1' or colA = 'value2' )
and colB = 'value3'
???
The example under the Nesting Sub Queries suggests that you should use simple and and or. Have you tried this? I mean something straightforward like:
table.where(t =>
((t.colA === "value1") or (t.colA === "value2"))
and (t.colB === "value3"))
Code like this seems to work fine for me.
I would like to do a subselect in order to do the following postgresql query with the querybuilder:
SELECT i.* FROM internship i
WHERE EXISTS (SELECT iw.*
FROM internship_weeks iw
WHERE i.id = iw.internship)
Does anyone have an idea how to get the same result with queryBuilder? or maybe with DQL?
Thanks for the help !
As example, only for demonstrate HOW-TO use a subquery select statement inside a select statement, suppose we what to find all user that not yet have compile the address (no records exists in the address table):
// get an ExpressionBuilder instance, so that you
$expr = $this->_em->getExpressionBuilder();
// create a subquery
$sub = $this->_em->createQueryBuilder()
->select('iw')
->from(IntershipWeek::class, 'iw')
->where('i.id = iw.intership');
$qb = $this->_em->createQueryBuilder()
->select('i')
->from(Intership::class, 'u')
->where($expr->exists($sub->getDQL()));
return $qb->getQuery()->getResult();
Hope this help
I would like to know what is the best way to split the data after a select all in a database with mysqli - please don't answer to add a where clause, because I can't in that situation, I NEED to manage data AFTER the query -.
So, I want to split the data in the mysqli_fetch_assoc.
What is the best method ? Is there a function to do that ? I need to do it manually with a for ? Is there an other easy solution to do it properly ?
Thanks for the help.
My code : (just an exemple, not the real code)
$select = "SELECT * FROM myTable";
$exec = mysqli_query($db, $select);
$rows = mysqli_fetch_assoc($exec);
// Now with a do while() I can display all the data
// But I want to display only 10 rows for exemple
// -> What is the best solution to split my data here ? <-
do{
// some html code here
}
while($rows = mysqli_fetch_assoc($exec))
Is there an other easy solution to do it properly ?
Definitely.
And it's fairly simple, and no WHERE clause required. Instead, you have to add LIMIT clause:
$select = "SELECT * FROM myTable LIMIT 10";
$exec = mysqli_query($db, $select);
while ($row = mysqli_fetch_assoc($exec)) {
// some html code here
}
I'm trying to use fetchAll on a query that has 2 variables. I can't figure out the syntax.
I can manage with only 1 variable:
$sql = "SELECT * FROM mytable WHERE field1 = ?";
$this->_db->fetchAll($sql,$value1); # that works
However I'm having some issues when query has multiple variables
$sql = "SELECT * FROM mytable WHERE field1 = ? AND field2 = ?";
$this->_db->fetchAll($sql,$value1,$value2); # doesn't work
$this->_db->fetchAll($sql,array("field1"=>$value1,"field2"=>$value2)); # doesn't work either
The reason why I want to use ? instead of placing the variables directly into the query is that I've learned that using ? allows for the query to be compiled generically by the db engine and improves performances.
There are two types of parameter, named parameters and positional parameters. You're mixing the two types and that won't work.
Named parameters match a placeholder by name. Names are started with the : symbol. The parameter names are not the same as the names of the columns you happen to use them for. You supply parameter values in an associative array, using the parameter name (not the column name) as the array keys. For example:
$sql = "SELECT * FROM mytable WHERE field1 = :param1 AND field2 = :param2";
$this->_db->fetchAll($sql,array("param1"=>$value1,"param2"=>$value2));
Positional parameters use the ? symbol for the placeholder. You supply parameter values using a simple (non-associative) array, and the order of values in the array must match the order of parameter placeholders in your query. For example:
$sql = "SELECT * FROM mytable WHERE field1 = ? AND field2 = ?";
$this->_db->fetchAll($sql,array($value1,$value2));
Most brands of SQL database natively support only one style or the other, but PDO attempts to support both, by rewriting the SQL if necessary before preparing the query. Since Zend_Db is modeled after PDO, Zend_Db also supports both parameter styles.
This question is a bit old, but I thought I'd just add to it for reference sake.
I would recommend starting to use Zend_Db_Select with Zend_Db. I've been doing a lot with Zend_Db lately. More from Zend_Db_Select reference guide.
Lets assume you have a Zend_Db adapter: $this->_db
# this will get the Zend_Db_Select object
$select = $this->_db->select();
# now you build up your query with Zend_Db_Select functions
$select->from('mytable');
$select->where('field1 = ?', $field1);
$select->where('field2 = ?', $field2);
[...]
# echo to see the SQL (helps in debugging)
# SELECT * FROM mytable WHERE field1 = ? AND field2 = ? [...]
echo '<p>My SQL: ' . $select . '</p>';
# Execute the SQL / Fetch results
$results = $select->query()->fetchAll();
That's the basics from your given example, but the Zend Framework reference guide on the select object has a lot of good information on how to build even more complex queries with JOINS, UNIONS, GROUP BY, LIMIT, HAVING, etc.
If you wanted to use an alias name for a table or parameters, you use an associative array with the alias name being the index value:
# SELECT p.* FROM products AS p
$select->from('p' => 'products');
If you want to return only selected fields, you add an array of field names as a second parameter:
# SELECT model FROM products
$select->from(products, array(model));
Actually, the above could should produce fully qualified SQL as:
SELECT 'products'.model FROM 'products'
but I wrote the above for brevity and clarity in the example.
One thing I just came across is using AND and OR in the WHERE condition.
# WHERE a = $a
$select->where('a = ?', $a);
# WHERE a = $a AND b = $b
$select->where('a = ?', $a);
$select->where('b = ?', $b);
# WHERE a = $a OR b = $b
$select->where('a = ?', $a);
$select->orWhere('b = ?', $b);
# WHERE a = $a AND b = $b
$select->orWhere('a = ?', $a);
$select->where('b = ?', $b);
Notice, that whatever the following "where" function you use, will combine with the previous statement as that operand. Ok, that sounded confusing.
If the second "where" is an "OR" it will be an "OR" conditional. If the second "where" is a "AND" the statement will be "AND".
In other words, the first WHERE function is ignored in terms of what condition it will use.
In fact, I just asked a question on Stack Overflow yesterday regarding doing a complex WHERE using select.
Hope that helps!
Cheers!
Try this:
$sql = "SELECT * FROM mytable WHERE field1 = ? AND field2 = ?";
$statement = $this->_db->query($sql,array("field1"=>$value1,"field2"=>$value2));
$data = $statement->fetchAll();
$this->_db must be an instance of Db adapter.
Heres the actual Zend way to code for this.
$sql = "SELECT * FROM mytable WHERE field1 = :param1 AND field2 = :param2";
$this->_db->fetchAll($sql,array("param1"=>$value1,"param2"=>$value2));
$where = $this->_db->select()
->from('mytable')
->where('field1 = ?',$value1)
->where('field2 = ?',$value2);
$rowSet = $this->_db->fetchAll($where);
This works great for me
I am using following zend code to select all data from a table where verified=1 and it is working for me.
$table = $this->getDbTable();
$select = $table->select();
$select->where('verified = 1');
$rows = $table->fetchAll($select);
No I want to select all data from that table where verified is not equal to '1'. I have tried the following ways but it is not fetching data.
$select->where('verified != 1');
$select->where('verified <> 1');
$select->where('verified != ?', 1);
Data structure for 'verified' column:
Field: verified
type: varchar(45)
Collation: utf8_bin
NULL: Yes
Default: NULL
Any idea that how to use 'not equal to' operator in WHERE clause in Zend? Thanks
$select->where('verified != ?', 1);
Real worls query example:
$query = $this->getDb()->select();
$query->from('title', array('title_id' => 'id', 'title', 'production_year', 'phonetic_code'))
->where('kind_id = 1')
->where('title = ?', trim($title))
->where('production_year != ?', '2009')
->limit(1)
;
Selects movies info from IMDB database. Works fine.
MySQL supports a custom operator <=> which returns true if the operands are equal or both null. It returns false if they are different, or if one operand is null.
$select->where('verified <=> 1');
This operator is non-standard. Standard SQL has syntax: IS NOT DISTINCT FROM that works just like MySQL's <=>.
Since your column is a varchar perhaps try where verified != '1' or verified is null
Can you show us the table structure for the table you are querying? Is the column verified an int or string? Also try printing the SQL statement that ZEND builds, see the echo line below.
$table = $this->getDbTable();
$select = $table->select();
$select->where('verified = 1');
echo sprintf("sql %s",$select);
$rows = $table->fetchAll($select);
Try :
$select->where('verified != ?', '1');
put quotation marks around the value. It is working for me.