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How to merge 2 queries in 1?


How to merge 2 queries in 1?

By : lecrash
Date : November 18 2020, 07:00 PM
it fixes the issue I have two requests that do the same thing, but for different groups. , You can use..
code :
UNION ALL
SELECT 
    SUM(CASE WHEN group = 0 AND date BETWEEN '2018-01-01' AND '2018-02-01' THEN 1 END) As Group1,
    SUM(CASE WHEN group IN (3, 4, 5, 6, 7, 8) AND date BETWEEN '2018-03-01' AND '2018-03-01 THEN 1 END) As Group2
FROM Table1 
WHERE label = 'label1'


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Merge queries into one

Merge queries into one


By : mySauce
Date : March 29 2020, 07:55 AM
With these it helps How about using JOIN statement? (Please see the footnote below about the JOIN problem.
code :
SELECT `i`.`order_id` AS 'OrderID',
       `i`.`order_item_id`,
       @productID := (SELECT MAX(
                CASE 
                    WHEN `meta_key` = '_product_id' 
                    THEN `meta_value` 
                    ELSE NULL 
                END)
           FROM `wp_woocommerce_order_itemmeta`
          WHERE `order_item_id` = `i`.`order_item_id`
            AND (`meta_key` = '_qty'
                 OR `meta_key` = '_product_id')) AS '_product_id',

       (SELECT MAX(
                   CASE 
                       WHEN `meta_key` = '_qty' 
                       THEN `meta_value` 
                       ELSE NULL 
                   END) 
          FROM `wp_woocommerce_order_itemmeta`
         WHERE `order_item_id` = `i`.`order_item_id`
           AND (`meta_key` = '_qty'
                OR `meta_key` = '_product_id')) AS 'Quantity',

       (SELECT MAX(
                   CASE 
                       WHEN `meta_key` = '_sku' 
                       THEN `meta_value` 
                       ELSE NULL 
               END)
          FROM `wp_postmeta`
         WHERE `post_id` = @productID
           AND (`meta_key` = '_sku'
                OR `meta_key` = '_price')) AS 'PartNumber',

       (SELECT MAX(
                   CASE 
                       WHEN `meta_key` = '_price' 
                       THEN `meta_value` 
                   ELSE NULL 
               END)
          FROM `wp_postmeta`
         WHERE `post_id` = @productID
           AND (`meta_key` = '_sku'
                OR `meta_key` = '_price')) AS 'UnitPrice'

 FROM `wp_woocommerce_order_items` AS `i` 
WHERE `i`.`order_id` = 50
  AND `i`.`order_item_type` = 'line_item'
GROUP BY `i`.`order_item_id`
How to merge (REMEMBER merge not combine!) these two queries

How to merge (REMEMBER merge not combine!) these two queries


By : Bhavik Kumar
Date : March 29 2020, 07:55 AM
Any of those help I have these two linq queries: , What about:
code :
public class TDtoWrapper
{
    public DateTime SortKey {get;set; }
    public Object Member {get;set;}
}


var result1 = from c in combo1
              select new TDtoWrapper { SortKey = c.ctime, Member = c }

var result2 = from c in combo2
              select new TDtoWraller { SortKey = c.startedfollowing, Member = c }

var result = result1.Concat(result2).Orderby(x => x.SortKey).Select(x => x.Member);
var combo1 = from c in db.comments
             join p in db.picture on c.targetpictureid equals p.idpictures
             join u in db.users on c.iduser equals u.iduser
             select new 
             { 
                SortKey = c.ctime, 
                Member = (object) new TCommentDTO
                {
                  idcomments=c.idcomments,
                  comment1 = c.comment1,
                  targetpictureid = c.targetpictureid,
                  ctime = c.ctime,
                  iduofpic=p.iduser,
                  iduofcommentor=c.iduser,
                  profilepicofcommentor=u.profilepic,
                  usernameofcommentor=u.username,
                  picFilename=p.picFilename,
                  picTitle=p.picTitle
                 }
             };


var combo2 = ...

var result = from c in combo1.Concat(combo2)
             orderby c.SortKey
             select c.Member;
merge four different queries in one

merge four different queries in one


By : user2967832
Date : March 29 2020, 07:55 AM
seems to work fine Let's assume I have these four queries: , Try
code :
SELECT credito, data, SUM(incasso) AS incasso, SUM(speca) AS speca
  FROM
(
  SELECT id_cre AS credito, data_eff AS data, 0.0 AS incasso, importo_fatt AS spesa 
    FROM fatture 
   WHERE data_eff < '2014-12-31' 
   UNION
  SELECT id_cre AS credito, data_prev AS data, 0.0 AS incasso, importo_fatt AS spesa 
    FROM fatture 
   WHERE data_prev >= '2014-12-31' 
   UNION 
  SELECT id_cre AS credito, data_prev AS data, importo AS incasso, 0.0 AS spesa 
    FROM incassi_prev 
   WHERE data_prev >= '2014-12-31' 
   UNION 
  SELECT id_cre AS credito, data_inc AS data, importo_inc AS incasso, 0.0 AS spesa 
    FROM incassi_row 
   WHERE data_inc < '2014-12-31'
) q
GROUP BY credito, data
Is it possible to merge these two queries?

Is it possible to merge these two queries?


By : user3123289
Date : March 29 2020, 07:55 AM
To fix the issue you can do I'm writing a sql query to count objects. I have about 50 pre-written queries, and each of them is essentially written like so:
code :
select count(1) from LIST_OF_TOYS where animalId in (select allThePetIDs from LIST_OF_PETS where ownerId = :myID)
Merge two sub-queries row-to-row

Merge two sub-queries row-to-row


By : Bhanwar Singh Rathor
Date : March 29 2020, 07:55 AM
around this issue The problem is you are creating a cross join with two 10 row tables.
So 10 x 10 = 100 rows.
code :
( SELECT @rowidFirst:=@rowidFirst+1 as rowid, first_name_tbl.*
  FROM  
    ( SELECT .... ) as first_name_tbl
) as firstWithRowID

( SELECT @rowidLast:=@rowidLast+1 as rowid, last_name_tbl.*
  FROM  
    ( SELECT .... ) as last_name_tbl
) as lastWithRowID
SELECT *
FROM firstWithRowID, lastWithRowID
WHERE firstWithRowID.rowid = lastWithRowID.rowid
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