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How to filter a table in SQL by a foreign key?


How to filter a table in SQL by a foreign key?

By : Siyer
Date : November 19 2020, 01:01 AM
I hope this helps you . Since one Customer can have multiple Bikes, and one Bike belongs to one customer, you should store the CustomerID in your bike table (1-to-many relationship).
code :
Bike                                     Customer
  + bikeID                                 + customerID
  + bikeBrand                              + customerAddress
  ...                                      ...
  + customerID                             
SELECT bikeID FROM Bike WHERE customerID = X;


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Model.objects.filter([foreign table]).update()

Model.objects.filter([foreign table]).update()


By : user7083831
Date : March 29 2020, 07:55 AM
To fix the issue you can do Due to the fact that the set of all books having all volumes processed equals to the result that the set of all books having at least one volume processed subtracts the set of all books having unprocessed volumes:
code :
Book.objects.filter(processed=True, volume__is_file_processed=True).exclude(volume__is_file_processed=False).update(status="PU")
# Or    
Book.objects.exclude(volume__is_file_processed=False).filter(processed=True, volume__is_file_processed=True).update(status="PU")
How to filter records when foreign table has combined primary key in SQL

How to filter records when foreign table has combined primary key in SQL


By : Jhonydel Escanilla
Date : March 29 2020, 07:55 AM
Any of those help You'd want to LEFT JOIN the tables on the composite key, and look for a NULL value on the right table in the join. This will tell you where you are missing data.
code :
SELECT 
    CheckList.ID_CHECKLIST, CheckList.NAME_CHECKLIST, CheckList.VERSION
FROM
    Machine_CHECKLIST 
LEFT JOIN CheckList ON Machine_Checklist.ID_CheckList = Checklist.ID_CheckList 
    AND Machine_Checklist.Version = CheckList.Version
WHERE 
   ID_Machine = 1 AND CheckList.ID_Checklist IS NULL
Yii2 GridView implement Filter and Sort for Values for related Table of foreign Table

Yii2 GridView implement Filter and Sort for Values for related Table of foreign Table


By : darshan mantri
Date : March 29 2020, 07:55 AM
activerecord filter out based on foreign table

activerecord filter out based on foreign table


By : Annnurag
Date : March 29 2020, 07:55 AM
I wish did fix the issue. I am tryng to create a association where Vacancy has one or many schedules & possibly many matchings , You should be able to do something like this
code :
Vacancy.includes(:schedules, :matchings)
.where(schedules: {start_date: Date.today..Date.today+14})
.order("schedules.start_date ASC")
.where.not(matchings: {state: "approved"})
Client.includes(:documents, :equipments).where(documents: {doc_type: 'equipment'} ).where(equipment: {shipper_id: 24}).count # 4

Client.includes(:documents, :equipments).where(documents: {doc_type: 'equipment'} ).where.not(equipment: {shipper_id: 24}).count # 314
Laravel search; filter by a foreign table then again filter results with the local table

Laravel search; filter by a foreign table then again filter results with the local table


By : Brad Taylor
Date : March 29 2020, 07:55 AM
this will help I saw my sql query and edited as needed and it worked. @Egretos for the suggestion.
code :
class ProductName implements Filter
{
   public static function apply(Builder $builder, $value, $checkbox)
   {
       if($checkbox == null) {
           $a = $builder->whereHas ('product', function ($query) use ($value) {
               $query->where('name', 'LIKE', '%' . $value . '%');
           });
       } else {
           $a = $builder->whereHas ('product', function ($query) use ($value) {
               $query->where('name', 'LIKE', '%' . $value . '%');
           })->whereRaw('`stocks`.`quantity` < `stocks`.`low_stock_threshold`'); //edited this line and it worked.

       }
       return $a;
   }

}
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