inner-join

问题 Ads entity is described by geographic information: Country> Region>County . The Ads entity is only linked with County . Consequently, retrieving Ads by countries will require us joining entities twice. My goal is counting the number of Ads for a given country. For that, I tried this DQL query but without success: public function getMotorsAdsCountByCountry($slug){ $qb = $this->_em->createQueryBuilder() ->select("m.id, COUNT(m.id) AS cnt") ->from("MinnAdsBundle:MotorsAds", "m") ->join("m.county

问题 Hello I have a table structure like this products_id | model_num | master_model_num 1 | cth001 | 0 2 | cth002 | 0 3 | cth003 | cth001 4 | cth004 | cth001 5 | cth005 | 0 6 | cth006 | cth002 My Problem I will provide the products_id to the table and it will get all product ids whoes master_model_num is equal to the model_num of the given products_id I have tried following query but it doen't generate the result that I want SELECT p.products_id FROM products p,products pp WHERE p.products_id=pp

问题 The following query returns >7000 rows when each table only has 340 rows. SELECT Config.Spec, TempTable.Spec FROM Confg INNER JOIN TempTable on Config.Spec = TempTable.Spec Why would this happen? If an INNER JOIN only returns a row if there is a match in both tables then why would it return multiple rows for a match. 回答1: If there is more than one row with the same Spec value in TempTable for the same Spec value in Confg , then you will get duplicate rows, and vice versa. 回答2: Are the Spec

问题 How to convert this raw query to Laravel eloquent way: select c.name as country from country c, address ad, city ci where ad.id = 1 and city.id = ad.city_id and c.code = ci.country_code 回答1: First link Second link Query Builder DB::table("country") ->join('city', 'city.country_code', '=', 'country.user_id') ->join('address', 'address.city_id', '=', 'city.id') ->select('country.name as country') ->where('address.id', 1) ->get(); Eloquent Country::with(['city','address' => function($query){

问题 i want to create an inner join on three tables like this one for example: SELECT C.Description, D.ItemDescription FROM OrderDetailStatement AS D INNER JOIN OrderHeaderStatement AS H ON H.OrderHeaderStatementRefID = D.OrderHeaderStatementRefID INNER JOIN customers AS C ON H.CustomerRefID = C.CustomerRefID WHERE (D.MixedValue > 1000) but i'm a little bit confused, could you please provide me a walkthrough? thanks in advance 回答1: ORMLite now supports simple JOIN statements. You can do something

问题 I have 2 servers one servers runs Microsoft SQL Server and the other one is using MySql. I need to be able to inner join a table from MS SQL name it "A" to a table "B" located on a different server that uses MySql So I want to be able to do something like this SELECT A.*, B.* FROM A INNER JOIN B ON A.id=B.id LIMIT 100 How can I do this? note that both servers are on the same network. 回答1: 1st link on google states... you need to install this: http://www.mysql.com/products/connector/ and

问题 I want to select data from more tables with Inner join. These are my tables. Student (studentId, firstName, lastname) Exam (examId, name, date) Grade (gradeId, fk_studentId, fk_examId, grade) I want to write a statement that shows which exam, grade and date alle the students have been to. Sorted after date. This is my statement. It runs, but i want to make sure that i am doing it correctly. SELECT student.firstname, student.lastname, exam.name, exam.date, grade.grade FROM grade INNER JOIN

问题 I want to select data from more tables with Inner join. These are my tables. Student (studentId, firstName, lastname) Exam (examId, name, date) Grade (gradeId, fk_studentId, fk_examId, grade) I want to write a statement that shows which exam, grade and date alle the students have been to. Sorted after date. This is my statement. It runs, but i want to make sure that i am doing it correctly. SELECT student.firstname, student.lastname, exam.name, exam.date, grade.grade FROM grade INNER JOIN

问题 I can currently query the join of two tables on the equality of a foreign/primary key in the following way. $result = mysql_query("SELECT * FROM `table1` INNER JOIN `table2` ON table1.primaryKey=table2.table1Id"); I'd like to extend this to multiple tables (all with the same foreign keys). I am trying the following code which is not returning anything. Can anyone point out what I'm doing wrong? $result = mysql_query("SELECT * FROM `table1` INNER JOIN `table2` INNER JOIN table3 ON table1

问题 I am trying to make the difference of two rows in an mysql database. I have this table containing ID, kilometers, date, car_id, car_driver etc... Since I don't always enter the information in the table in the correct order, I may end up with information like this: ID | Kilometers | date | car_id | car_driver | ... 1 | 100 | 2012-05-04 | 1 | 1 2 | 200 | 2012-05-08 | 1 | 1 3 | 1000 | 2012-05-25 | 1 | 1 4 | 600 | 2012-05-16 | 1 | 1 With a select statement I am able to sort my table correctly: