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Get subquery where clause id match id from main query


Get subquery where clause id match id from main query

By : Yuuki Umeda
Date : November 17 2020, 01:00 AM
I think the issue was by ths following , We were able to fix this by using a join in the subquery. Running this takes about 0.109 seconds to run.
code :
(
select dd2.views, dd2.clicks, dd2.view_cost, dd2.click_cost, dd2.ad_id from daily_displays dd2
join ads ads2 on(ads2.owner_id = 13035 and ads2.ad_id = dd2.ad_id)
where day = curdate()
) as dd using(ad_id)


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T-SQL: Can a subquery in the SELECT clause implicitly reference a table in the main outer query?

T-SQL: Can a subquery in the SELECT clause implicitly reference a table in the main outer query?


By : Jeremy Scharlow
Date : March 29 2020, 07:55 AM
wish helps you Yes this is valid syntax.
A SELECT without a FROM is treated as though selecting from a single row table. Referencing columns from the outer query is required for correlated sub queries and is perfectly valid there.
code :
SELECT NAME, 
       CASE 
         WHEN o.ORDERID IS NULL THEN 0 
         ELSE 1 
       END BUYER, 
FROM   CUSTOMER c 
       LEFT JOIN ORDER o 
              ON c.CUSTID = o.CUSTID 
SELECT A, 
       B, 
       CASE 
         WHEN EXISTS (SELECT T.A 
                      EXCEPT 
                      SELECT T.B) THEN 1 
         ELSE 0 
       END AS DistinctFrom 
FROM   T 
SELECT A, 
       B, 
       CASE 
         WHEN A <> B 
               OR ( A IS NULL 
                    AND B IS NOT NULL ) 
               OR ( A IS NOT NULL 
                    AND B IS NULL ) THEN 1 
         ELSE 0 
       END AS DistinctFrom 
FROM   T 
Subquery in Linq query giving A query body must end with a select clause or a group clause

Subquery in Linq query giving A query body must end with a select clause or a group clause


By : hoppjo
Date : March 29 2020, 07:55 AM
will help you The closing round paranthesis ends the query which needs a select at the end.
Why don't you use method syntax? It is much better readable in this case. Also, a Select is optional with .Where and method syntax:
code :
  join d in TourDates on t.TourId equals d.TourId
  where d.Date == dt
  select new
  {
       t.TourId,
       d.TourDateId,
       booked = Bookings.Where(b => d.TourDateId == b.TourDateId)
                        .Sum(b => b.NumberBooked()) 
  };
DISTINCT clause in main query and subquery

DISTINCT clause in main query and subquery


By : Camden Taylor
Date : March 29 2020, 07:55 AM
hop of those help? Below is my query : , Try the below query -
code :
SELECT distinct (di.device_token) FROM device_info di,user_details
where di.IMEI_number in (user_details.ud.device_id)
and ud.device_OS='android';
Why does adding FROM clause resolve the effect of WHERE condition in subquery on main query?

Why does adding FROM clause resolve the effect of WHERE condition in subquery on main query?


By : rllaurado
Date : March 29 2020, 07:55 AM
With these it helps Your first query is acting like a correlated sub-query, i.e. the rows it is referencing come from the result set in the outer query. It is in effect just saying "is the column value in this row like '%diabetes%'"; it is therefore no different to putting that WHERE clause in the outer query.
By add the FROM in your sub-query you are creating a secondary resultset of encodeids that have diabetes in the disease column and then selecting all rows that have that encodeid in the first resultset without reference to the disease column.
MySQL access subquery column name in main query where clause

MySQL access subquery column name in main query where clause


By : Michael Riley
Date : March 29 2020, 07:55 AM
I hope this helps . trying to put a condition in the main where clause that checks a value from a subquery. , What about
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