join

Displaying multiple values from same name MySQL database field in Codeigniter & Dwoo

I am building a web application and have opted to use similar table and field names to Wordpress in my application. By that I mean I have a users table and a usermeta table similar to how Wordpress works. Forgive me for making this question so big, I opted to be as descriptive as possible in this question. The usermeta table has the fo...

CakePHP, setting recursive to -1 for a model so it doesn't do "joins"?

I have 2 models that are associated but don't want it to use joins when I make database updates.. from the cakephp cookbook, I can't quite gather how I am supposed to set "recursive" to -1, also, do I do it for the model that has the association, the other one, or both such as if model1 "belongs to" model2 and I am trying to make it so...

Is there a way to cross locations of Sainsburys with BP garages to get places where they are together?

I've seen a photo I'd like to trace the location of. In it is a BP garage and a Sainsburys supermarket. Google Maps holds all the info and I'm sure many others do - what I'd like is to be able to quickly do a join-type operation on the data. It would ahve to be proximity limited but if this was using, say, the town name or the first 4 di...

Best way to join tables using sqlite in android.

I am trying to find out the best way to do a simple table join on my two tables using a sqlite database in an android application. Is the simplest way to use CursorJoiner or is there any easier way? ...

How to do an inner join in Android?

I would like to do an inner join on my database in my Android app. Is this even possible? What about a left join? I know cursor joiner exists but the documentation isn't clear at all. Can anyone provide any further insight? Thanks ...

LINQ join and group

How to expand this query: public Dictionary<int, List<TasksInDeal>> FindAllCreatedTasks() { return (from taskInDeal in db.TasksInDeals where taskInDeal.Date > DateTime.Now && taskInDeal.Date < DateTime.Now.AddDays(7) group taskInDeal by taskInDeal.CreatedByUserID into groupedDemoClasses ...

Sql query join nearest date

I have a sqlite query that I'm trying to write. I have two tables: TableA (sales): id sales date TableB (goals): id goal date I'm selecting from TableA like this: SELECT id,sales,date FROM TableA Now to the "tricky" part. I need to join TableB to the query because I need the goal field in TableB for each row in TableA. TableB only co...

How do I create a join which says a field is not equal to X?

I have the following database table with information about people, diseases, and drugs: PERSON_T DISEASE_T DRUG_T ========= ========== ======== PERSON_ID DISEASE_ID DRUG_ID GENDER PERSON_ID PERSON_ID NAME DISEASE_ST...

SQL join on one-to-many relation where none of the many match a given value

Say I have two tables User ----- id first_name last_name User_Prefs ----- user_id pref Sample data in User_Prefs might be user_id | pref 2 | SMS_NOTIFICATION 2 | EMAIL_OPT_OUT 2 | PINK_BACKGROUND_ON_FRIDAYS And some users might have no corresponding rows in User_Prefs. I need to query for the first name and l...

Parallel programming using python's multiprocessing and process defunc

Hi there, I have a problem with creating parallel program using multiprocessing. AFAIK when I start a new process using this module (multiprocessing) I should do "os.wait()" or "childProcess.join()" to get its' exit status. But placing above functions in my program can occur in stopping main process if something happens to child process...

mysql join is very slow

hi All I have two tables (MYISAM) create table A (email varchar(50)); create table B( email varchar(50) key 'email' (email)); Table A has 130K records Table B has 20K records why does this sql statement take very long time (more than two minutes, then i aborted query by Ctrl+C) Statement is: select count(*) from user A, tmp B where...

Can joins be used when getting objects from a LINQ DataContext?

I'm using LINQ and a DataContext to return a collection of objects from a SQL Server table. The table is named "Widgets" and the corresponding C# class I'm using is shown below. The Widgets table contains a Name column, and a TypeID column which is a foreign key to another table of widget types. [Table(Name = "Widgets")] public Class Wi...

SQL JOIN get name and all tags for item

Hi all, this is my first ever JOIN clause and I did run into a problem. I want to echo all the necessary information for my items but I don't understand how to echo all the tags for one item, right now I get a list with duplicates of items but with different tags if more than one tag is assigned for an item. Any ideas? Better ways to do...

ORACLE Join V$SQLAREA V$SESSION

hi all, which column i need to use to join V$session and V$sqlarea? My main aim is to find top 5 queries with most disk_reads and generate a report containing relevant information. Thanks ...

Linq: To join or not to join (which is the better way, joins or relationships)

I have written quite a bit of code which uses the Linq2Sql table relationships provided to me just by having foreign keys on my database. But, this is proving to be a bit laborious to mock data for my unit tests. I have to manually set up any relationships in my test harness. So, I am wondering if writing Linq joins rather than relying ...

MySQL JOIN query help: return only one row from the right-most table for every row in the left-most table

I have two tables. I want to join them in a way that only one record in the right table is returned for each record in the left most table. I've included an example below. I'd like to avoid subqueries and temporary tables as the actual data is about 4M rows. I also don't care which record in the rightmost table is matched, as long as one...

Help forming a complex SQL statement

Hello friends! I'm coming up stumped on forming a working SQL statement for a project of mine. First of all, I have a "questions" table and a "response" table. The response table is tied to the question table through a foreign id called "question_id" (tied to the questions "id"). A question doesn't necessarily have to have a response, b...

Creating a left outer join in MySQL with right-hand constraints

As per http://stackoverflow.com/questions/3264227/relations-with-multiple-keys-in-doctrine-1-2, I have two tables which (as I can't get it to work in Doctrine) I'm trying to join as a MySQL view: part: part_id product_id part_type_id part_short_code ... part_translation: part_type_id part_short_code language_id internationalised_n...

MySQL Join Query

I need to query the database by joining two tables. Here is what I have: Table Town: id name region Table Supplier: id name town_id I currently have the following query which outputs all the Towns that belong to a given region: SELECT id, name FROM Town WHERE region = 'North West'; Now I need to extend this query and create t...

Get SUM in GROUP BY with JOIN using MySQL

I have two tables in MySQL 5.1.38. products +----+------------+-------+------------+ | id | name | price | department | +----+------------+-------+------------+ | 1 | Fire Truck | 15.00 | Toys | | 2 | Bike | 75.00 | Toys | | 3 | T-Shirt | 18.00 | Clothes | | 4 | Skirt | 18.00 | Clothes | | 5 | ...