query-builder | 易学教程

ORMLite - Parenthesis in join where clauses

阅读更多关于 ORMLite - Parenthesis in join where clauses

问题 I would like to join three tables using QueryBuilder.join and QueryBuilder.joinor but I want parenthesis in the where clause something like this: WHERE first_table_where AND (second_table_where OR third_table_where) but it seems that is not possible. Perhaps I am missing something. Any help would be appreciated. 回答1: I guess that is a part of the doc you have been looking for... If you want to do complex queries linearly, you can even use Reverse Polish Notation (of all things). There is a

How to create an AND button that adds a AND statement to a query?

阅读更多关于 How to create an AND button that adds a AND statement to a query?

问题 I'm making some type of query builder and I want to implement a button to add a AND statement to my query. I made a version where I have 1 AND statement implemented but it's a bit devious and I want the user to have the ability to do more than one AND statement. This the code I have at the moment. UPDATED This is my .php file: <?php include "connect.php"; //Ophalen van de waarden uit de tabel(len) en veld(en) $table = $_GET['tableSelected']; $field = $_GET['fieldSelected']; $attribute = $_GET

Doctrine 2.5 Unexpected association fetch behavior [Symfony 3]

阅读更多关于 Doctrine 2.5 Unexpected association fetch behavior [Symfony 3]

问题 I have 3 entities associated this way: Don't worry, I've set associations using annotations, but I thought the following mix would be lighter/cleaner to expose my issue Post @ORM\ManyToOne(targetEntity="User", fetch="EAGER") - author User @ORM\OneToOne(targetEntity="Vip", mappedBy="user", fetch="EAGER") - vip Vip # Notice that the primary key of vip is a foreign key on User primary @ORM\id @ORM\OneToOne(targetEntity="User", inversedBy="peliqan", fetch="EAGER") @ORM\JoinColumn(name="user_id",

Entity field - queryBuilder->select()

阅读更多关于 Entity field - queryBuilder->select()

I have a problem with entity field, query builder and OneToOne relationship. When I created entity field with query_builder in form class and when I set select ('u.id, u.username') I get exception: >need array or object, integer given. When I set select('u') is fine but I get columns with OneToOne relationship and Doctrine generates x additional SELECT queries. What do I have to do? EDIT: MORE DETAILS For example I have two entity with oneToOne relation, User and Contact: <?php namespace Nuvola\UserBundle\Entity; use Doctrine\ORM\Mapping as ORM; /** * User * * @ORM\Table() * @ORM\Entity */

Laravel 5, Derived table in join clause?

阅读更多关于 Laravel 5, Derived table in join clause?

问题 I have this query: SELECT * FROM blog LEFT JOIN ( SELECT blog_id, AVG(value) as blog_rating FROM blog_ratings GROUP BY (blog_id) ) T ON T.blog_id = blog.id; I do not know how to write this with Eloquent. For Example: Blog::select("*")->leftJoin( /* Here goes derived table */ )->get() How do I accomplish this? 回答1: I'd personally just use the fluent query builder, try this out and see how it works out: DB::table('blog') ->select('*') ->leftJoin(DB::raw('(SELECT blog_id, AVG(value) as blog

Creating a mongodb query in Java with $or and $in

阅读更多关于 Creating a mongodb query in Java with $or and $in

问题 I am trying to write a java code using mongodb api to create this mongodb query: { "$or": [{"prd" : {"$in" : ["1234", "0987"]}} , {"rsin" : "3228742"}]} Here's the code I am working with so far: QueryBuilder builder = new QueryBuilder(); if (builder == null) { builder = QueryBuilder.start(); } if (mongoKey.equals("prd")){ ArrayList<String> vals = new ArrayList<String>(); for (int i=0; i < prdList; i++){ vals.add(prdList.get(i)); } DBObject obj = new BasicDBObject (mongoKey, new BasicDBObject(

Symfony2 subquery within Doctrine entity manager

阅读更多关于 Symfony2 subquery within Doctrine entity manager

问题 I need to perform this query: SELECT * FROM (SELECT * FROM product WHERE car = 'large' ORDER BY onSale DESC) AS product_ordered GROUP BY type In Symfony2 using the entity manager. My basic query builder would be : $query = $em->getRepository('AutomotiveBundle:Car') ->createQueryBuilder('p') ->where('pr.car = ?1') ->andWhere('pr.status = 1') ->orderBy('pr.onSale', 'DESC') ->setParameter(1, $product->getName()) ->groupBy('p.type') ->getQuery(); But I cannot work out how to add in a subquery to

Runtime SQL Query Builder

阅读更多关于 Runtime SQL Query Builder

My question is similar to Is there any good dynamic SQL builder library in Java? However one important point taken from above thread: Querydsl and jOOQ seem to be the most popular and mature choices however there's one thing to be aware of: Both rely on the concept of code generation , where meta classes are generated for database tables and fields. This facilitates a nice, clean DSL but it faces a problem when trying to create queries for databases that are only known at runtime . Is there any way to create the queries at runtime besides just using plain JDBC + String concatenation? What I'm

How to injecting custom columns in Laravel query builder

阅读更多关于 How to injecting custom columns in Laravel query builder

I got a query with many joins, wheres, ect. And what I need to do is insert some maths into each result set as it will be feeding either a csv export or be displayed on page. Can later on even be sent back as API, so what I really want to do is prepare the data once, and then use it where ever. $result = DB::table('a') ->join('b') ->where('c') ->orderBy('d') ->select('e'); if ($paginate) { $query->paginate(); } else { $query->get(); } So the question is, can I somehow iterate through my results and do some maths as I get them? Like maybe a callback on each result? For example get difference

Laravel - named subquery using Query Builder

阅读更多关于 Laravel - named subquery using Query Builder

In MySQL subqueries documentation there's an exmaple of subquery: SELECT ... FROM (subquery) [AS] name ... Here's the raw query which I want to transform: select SUBQUERY_NAME.* from (select id, name from items) AS SUBQUERY_NAME Is there any way to do this in Laravel Query Builder without using DB::raw() ? Unfortunatelly no. The Query Builder has its limitations and more complex queries are outside its scope, that's why DB::raw() is there. But, if you want to make it a little more elegant and generate the subquery using the Query Builder, you could do something like this this: $subquery = DB: