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Merge/Combine two select statements into one


Merge/Combine two select statements into one

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Merge/Combine two select statements into one
Tag : mysql , By : MrSparky
Date : November 14 2020, 07:01 AM

To fix the issue you can do I've got the following MySQL statement that has a couple of select statements of which one does a select for all the results returned by another select. Just wondering if it can be combined into one by any chance. Eg. Like a triple join. , Use aliases for table network_installations:
select networks.name as network_name, installations.name as installation_name
from network_installations ni1
join installations on installations.id = ni1.installation_id
join networks on networks.id = ni1.network_id
join network_installations ni2 on ni2.network_id = ni1.network_id
where ni2.installation_id = 1

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How do I combine 2 select statements into one?


Tag : sql , By : Blaise Roth
Date : March 29 2020, 07:55 AM
I hope this helps . You have two choices here. The first is to have two result sets which will set 'Test1' or 'Test2' based on the condition in the WHERE clause, and then UNION them together:
select 
    'Test1', * 
from 
    TABLE 
Where 
    CCC='D' AND DDD='X' AND exists(select ...)
UNION
select 
    'Test2', * 
from 
    TABLE
Where
    CCC<>'D' AND DDD='X' AND exists(select ...)
select 
    case 
        when CCC='D' AND DDD='X' AND exists(select ...) then 'Test1'
        when CCC<>'D' AND DDD='X' AND exists(select ...) then 'Test2'
    end,
    * 
from 
    TABLE 
Where 
    (CCC='D' AND DDD='X' AND exists(select ...)) or
    (CCC<>'D' AND DDD='X' AND exists(select ...))

Can I combine these two almost identical MERGE statements into one?


Tag : sql , By : CrimsonGore
Date : March 29 2020, 07:55 AM
it should still fix some issue Solved it on my own... figured it was an issue with the AND/NOT logic!
MERGE assignment_tbl AS target
USING (SELECT 1 s) AS source
ON target.id = @id
   AND target.id1 = @id1
   AND target.id2 = @id2
   AND target.bActive = 1
WHEN matched AND (NOT (target.iFeeScope = @iFeeScope)) 
             OR (NOT (target.nFeeAmount = @nFeeAmount)) THEN
  UPDATE SET target.dLastUpdated = @dNow,
             target.dDisabled = @dNow,
             target.bActive = 0; 

Trying to combine three individual SELECT statements into one main SELECT statement


Tag : sql , By : somebody
Date : March 29 2020, 07:55 AM
should help you out You can remove the WHEREs, as well as the non-correlated subqueries in the select list, and probably simplify it to this...
SELECT 
  AID
  , EID
  , STOREID
  , [Language]
  , 'BrandLabel' = CASE WHEN BrandLabel LIKE '%"' 
                         THEN LEFT(BrandLabel, LEN(BrandLabel) -1)
                        ELSE BrandLabel
                   END
  , 'Terms' = CASE WHEN Terms LIKE '%"' 
                         THEN LEFT(Terms, LEN(Terms) -1)
                        ELSE Terms
                   END
  , 'TrackOrderLbl' = CASE WHEN TrackOrderLbl LIKE '%"' 
                         THEN LEFT(TrackOrderLbl, LEN(TrackOrderLbl) -1)
                        ELSE TrackOrderLbl
                   END
FROM parallel_Purchase_Email_Content_OMS WITH (NOLOCK)

Combine/Merge two MYSQL SELECT statements into one


Tag : mysql , By : mlapida
Date : March 29 2020, 07:55 AM
help you fix your problem I'm looking for help using a single SELECT statement. Example using two statements: , Why not just use or?
SELECT id
FROM sales
WHERE (saledate BETWEEN DATE_ADD(NOW(), INTERVAL 40 DAY) AND DATE_ADD(NOW(), INTERVAL 365 DAY)) OR
       (saledate BETWEEN NOW() AND DATE_ADD(NOW(), INTERVAL 40 DAY))
ORDER BY saledate;
SELECT id
FROM sales
WHERE saledate BETWEEN (NOW() AND DATE_ADD(NOW(), INTERVAL 365 DAY)
ORDER BY saledate;
SELECT id
FROM sales
WHERE saledate BETWEEN (NOW() AND DATE_ADD(NOW(), INTERVAL 365 DAY)
ORDER BY (saledate >= DATE_ADD(NOW(), INTERVAL 40 DAY) ) DESC,
         saledate;

How to combine two select statements into one select statement in MSSQL?


Tag : sql-server , By : shehan
Date : March 29 2020, 07:55 AM
I hope this helps you . Normally, you would use an inner join for things like that. But inner join needs some common columns between the two objects it joins, and you don't have that.
Since your queries also does not contain an ORDER BY clause, there is no reliable way to join them so that each row in table1 will always be joined to the same row in table2.
;WITH CTE1 AS
(
    SELECT  a1, 
            b1, 
            c1,
            ROW_NUMBER() OVER(ORDER BY [time]) AS rn
    FROM Table1
    WHERE time between '2018-03-05' and '2018-03-06'
), CTE2 AS
(
    SELECT  a2, 
            b2, 
            c2,
            ROW_NUMBER() OVER(ORDER BY [time]) AS rn
    FROM Table2
    WHERE time between '2018-03-05' and '2018-03-06'
)

SELECT t1.a1, t1.b1, t1.c1, t2.a2, t2.b2, t2.c2                     
FROM cte1 as t1
INNER JOIN cte2 as t2 ON t1.rn = t2.rn
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