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How to merge MySQL columns into one column if there are empty values in the table?


How to merge MySQL columns into one column if there are empty values in the table?

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How to merge MySQL columns into one column if there are empty values in the table?
Tag : mysql , By : Ray
Date : November 24 2020, 01:01 AM

should help you out I thought it would be better if I ask you by showing images. , Presumably, you want to compare for NULL/blank/whatever:
INSERT INTO person (person_name)
      SELECT director_name
      FROM people
      WHERE people_id < 150000 AND
            director_name IS NOT NULL AND
            director_name <> '';

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in mysql is it possible to sort results using one columns of a table if not empty or another table column


Tag : mysql , By : NewGirl
Date : March 29 2020, 07:55 AM
hop of those help? I have those two tables, Artist and Pseudonym, Artist belongsTo Pseudonym
...ORDER BY COALESCE(p.name, a.Lastname)

Oracle - How to use merge to update a column based on the values from other table and columns


Tag : sql , By : eferro
Date : March 29 2020, 07:55 AM
wish helps you You have two errors, as you can see with a simple example. Firstly the on clause needs to be wrapped in parenthesis. Secondly, you can't reference the alias of the sub-select in the using clause within that sub-query.
If I set up a simple example using your table names as follows:
create table pr_dmn as
 select level as a, sysdate as b
   from dual
connect by level <= 10;

Table created.


create table PR_ACTIVITY_LOG as
 select level as a, sysdate as b
   from dual
connect by level <= 20;

Table created.
merge into pr_dmn dmn
 using (select a, b from pr_activity_log) alg -- no alg. inside the sub-query
    on (dmn.a = alg.a) -- wrapped in parenthesis
  when matched then
update set dmn.b = alg.b
       ;

10 rows merged.

Mysql Merge 2 Columns in table but prefer first column value over second


Tag : mysql , By : Brianna
Date : March 29 2020, 07:55 AM
To fix the issue you can do I have a two column in my database like: , UPDATE tablename SET final=IF(OMI='',IUT,OMI);

I'm looking for an efficient way to merge multiple empty column in mysql to a single table


Tag : mysql , By : Luciano Campos
Date : March 29 2020, 07:55 AM
Hope that helps You need to pivot your data.
This is done by using GROUP BY and MAX functions.
    SELECT 
        unpivotted.MatricNo
      , MAX(unpivotted.KHE101) AS KHE101
      ...
      ...
      , MAX(unpivotted.SPE104) AS SPE104
    FROM (

     SELECT students.MatricNo,
    (CASE WHEN courses.Code = 'KHE 101' THEN results.Total ELSE '' END) AS 'KHE101',
    (CASE WHEN courses.Code = 'KHE 102' THEN results.Total ELSE '' END) AS 'KHE102',
    (CASE WHEN courses.Code = 'KHE 103' THEN results.Total ELSE '' END) AS 'KHE103',
    (CASE WHEN courses.Code = 'KHE 104' THEN results.Total ELSE '' END) AS 'KHE104',
    (CASE WHEN courses.Code = 'TEE 103' THEN results.Total ELSE '' END) AS 'TEE103',
    (CASE WHEN courses.Code = 'TEE 128' THEN results.Total ELSE '' END) AS 'TEE128',
    (CASE WHEN courses.Code = 'GCE 101' THEN results.Total ELSE '' END) AS 'GCE101',
    (CASE WHEN courses.Code = 'KHE 105' THEN results.Total ELSE '' END) AS 'KHE105',
    (CASE WHEN courses.Code = 'KHE 107' THEN results.Total ELSE '' END) AS 'KHE107',
    (CASE WHEN courses.Code = 'KHE 108' THEN results.Total ELSE '' END) AS 'KHE108',
    (CASE WHEN courses.Code = 'KHE 109' THEN results.Total ELSE '' END) AS 'KHE109', 
    (CASE WHEN courses.Code = 'TEE 102' THEN results.Total ELSE '' END) AS 'TEE102',
    (CASE WHEN courses.Code = 'GES 107' THEN results.Total ELSE '' END) AS 'GES107',
    (CASE WHEN courses.Code = 'SPE 104' THEN results.Total ELSE '' END) AS 'SPE104'


    FROM results
    INNER JOIN students ON results.Student = students.Guid
    INNER JOIN courses ON results.Course = courses.Guid
    INNER JOIN departments ON students.Department = departments.Guid

    WHERE departments.Code = 'KHE' AND results.Level = 100

    ) AS unpivotted

GROUP BY 
  unpivotted.MatricNo
ORDER BY
  unpivotted.MatricNo ASC

Mysql count column values and merge columns


Tag : mysql , By : Gipsy.D
Date : March 29 2020, 07:55 AM
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