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Unknown column 'unknown' in 'where clause'


Unknown column 'unknown' in 'where clause'

By : Raghu
Date : November 19 2020, 01:01 AM
it fixes the issue If your column username is a string typed, you should add a ' for filtering, like this:
code :
$query="SELECT * FROM users WHERE username = '". $_SESSION['login_user'] + "'";


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Unknown column in where clause in query without where clause

Unknown column in where clause in query without where clause


By : mitzuui
Date : March 29 2020, 07:55 AM
this one helps. The possibility is that there are triggers set on the table or you are executing the wrong query. Bare in mind that the server is not lying. :D
Triggers are evil!
MySQL query - unknown column in where clause- column value might not yet be determined when the WHERE clause is executed

MySQL query - unknown column in where clause- column value might not yet be determined when the WHERE clause is executed


By : Tom Johns
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further The alias for your column cont is not available in the WHERE clause. You will want to use something similar to this:
code :
SELECT area_id, 
  area_name,
  cont
FROM
(
  SELECT area_id, 
    area_name,
    (select count(*) 
     from applications
     where claims_status=1 
     and center_name=c.area_id) as cont
  FROM apparea c
) c 
where cont<>0
select c.area_id,
  c.area_name,
  a.cont
from apparea c
left join
(
  select count(*) cont,
    center_name
  from applications
  where claims_status=1 
  group by center_name
) a
  on c.area_id = a.center_name
SQL QUERY Unknown column <unknown column name> in <unknown field list>

SQL QUERY Unknown column <unknown column name> in <unknown field list>


By : Iriskinn
Date : March 29 2020, 07:55 AM
To fix the issue you can do AND YES!! the problem is in my TRIGGER portion..hehehe.. I forgot about my trigger..
well this goes this way, I deleted a column namely(USER) in the ORIGINAL TABLE(tblwalkin) then I didn't modify my trigger table.. that's why the ERROR is
how to resolve Unknown column in 'where clause'many clause

how to resolve Unknown column in 'where clause'many clause


By : Ben
Date : March 29 2020, 07:55 AM
will be helpful for those in need Your problem is that correlation clauses cannot be nested more than one level deep -- hence the reason by products is not seen. One solution is to transform this to conditional aggregation. That is a bit tricky, but here is one method:
code :
SELECT p.* ,
       sum(pd.sell) as total,
       max(case when pd.id = pdd.max_id then pd.sell end) as ysell,
       sum(case when pd.id >= pdd.id7 then pd.sell end) as wsell
FROM products p JOIN
     product_details pd
     ON pd.product_id = p.id JOIN
     (SELECT pd.product_id, MAX(pd.id) as max_id,
             SUBSTRING_INDEX(SUBSTRING_INDEX(GROUP_CONCAT(pd.id ORDER BY pd.id DESC), ',', 7), ',', -1) as id7
      FROM product_details pd
      GROUP BY pd.product_id
     ) pdd
     ON pdd.product_id = p.id
GROUP BY p.id;  -- reasonable assuming `id` is unique/primary key
Laravel Nova Column in where clause is ambiguous/Unknown column in where clause

Laravel Nova Column in where clause is ambiguous/Unknown column in where clause


By : Perez Ricardo El Cir
Date : March 29 2020, 07:55 AM
I wish this helpful for you When querying multiple tables at once, you have to specify the table names for common column names. So when querying the id, use this:
code :
return $query->whereIn('time_slots.id',$time_slot_ids);
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