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Displaymemberpath of joined table


Displaymemberpath of joined table

By : Audrey Morehead
Date : November 18 2020, 01:01 AM
it should still fix some issue You join the profs and the contacts but only put the profs (a) into asdf.
So do the following:
code :
var asdf = (from a in dbContext.tblProfessionals
join b in dbContext.contacts on a.contactId equals b.id
select new { ContactId = a.contactId, FirstName = b.firstname, LastName = b.lastname});
cbProf.DisplayMemberPath = asdf.FirstName;


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How to select the COUNT() of a joined table when the joined table has a combination of multiple columns as its primary k

How to select the COUNT() of a joined table when the joined table has a combination of multiple columns as its primary k


By : user255501
Date : March 29 2020, 07:55 AM
Does that help Count will only return the number of non null values in a column or the number of rows in a result set for the special case of count(*). In other words count(paylog.*) isn't valid SQL.
You don't need a unique column in the paylog table to do a valid count, any column will do. If the join is successful it'll increment the count, if not the column's value will be null and the count stays the same.
Rails Mysql Find Joined Table's Joined Table By Date Created At Not Within n Months

Rails Mysql Find Joined Table's Joined Table By Date Created At Not Within n Months


By : De0D
Date : March 29 2020, 07:55 AM
wish help you to fix your issue I am having a hard time with a query. This is in rails (2.1), but maybe I need a find_by_sql. , Could you try a real query without subselects?
code :
SELECT companies.* FROM companies
 JOIN clients ON clients.company_id = companies.id 
 JOIN groups ON groups.client_id = clients.id
 GROUP BY companies.id
 HAVING MAX(groups.created_at) < '2012-06-01';
How do I put a conditioned count of a joined table in a separate column of the same joined table

How do I put a conditioned count of a joined table in a separate column of the same joined table


By : Wahid Sabbir
Date : March 29 2020, 07:55 AM
help you fix your problem I can only assume that you are telling us part of the picture so I will reserve judgement about the DB schema, normalization etc.
Given the presented facts you can retrieve the information in the following manner.
code :
   SELECT p.people_id
        , p.company_id
        , p.job_id
        , b.bonus_id
        , ISNULL((
                   SELECT COUNT(pt.Job_Id)
                     FROM Bonus bt 
               INNER JOIN People pt
                       ON pt.job_Id = bt.job_Id
                    WHERE pt.company_Id = p.company_Id
                 GROUP BY pt.company_Id                 
                 ), 0) AS no_of_bonus_for_company
     FROM People p 
LEFT JOIN Bonus b
       ON p.job_Id = b.job_Id
Filtering on a joined table but also including data where the joined & filtered table is empty?

Filtering on a joined table but also including data where the joined & filtered table is empty?


By : Charles Bannister
Date : March 29 2020, 07:55 AM
wish helps you I have a table with User Information and a table with tag information. The tag table basically has a TagType, a UserID and a value for the tag. I joined the two tables based on the UserID. , Put your WHERE condition inside the JOIN condition.
code :
SELECT [user].name, [tag].value
FROM user LEFT OUTER JOIN 
  tag ON user.id = tag.userid and [tag].type = 1
SQL Lookup data in joined table based on LIKE value stored in joined table column

SQL Lookup data in joined table based on LIKE value stored in joined table column


By : curns
Date : March 29 2020, 07:55 AM
With these it helps This should do the trick, you will just need to modify the CAST(p.zone as nchar(10)) to insert the correct data type for your category_lookup column, in place of nchar(10), as I assume the zone in Products is an int where as the lookup column is some string based column:
code :
SELECT p.product_id, p.zone, p.product_category, sc.product_subcategory
FROM Products p
LEFT JOIN SubCategory sc ON p.zone = sc.zone
AND CAST(p.zone as nchar(10)) like sc.category_lookup
SELECT p.product_id, p.event_id, e.zone, p.product_category, 
       sc.product_subcategory
FROM Products p
INNER JOIN events e on p.event_id = e.event_id
LEFT OUTER JOIN SubCategory sc ON e.zone = sc.zone 
     AND CAST(e.zone as nchar(250)) LIKE CAST(sc.category_lookup as nchar(250))
SELECT p.product_id, p.event_id, e.zone, p.product_category, 
       sc.product_subcategory
FROM Products p
INNER JOIN events e on p.event_id = e.event_id
LEFT OUTER JOIN SubCategory sc ON e.zone = sc.zone 
     AND CAST(p.product_category as nchar(250)) LIKE sc.category_lookup
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