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Display all the fields associated with the record using Impala


Display all the fields associated with the record using Impala

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Display all the fields associated with the record using Impala
Tag : hadoop , By : Guy Kastenbaum
Date : December 01 2020, 05:00 PM

it should still fix some issue Suppose, I have a student table with some fields in impala. Imagine there is a field called total_mark and I should find the student details with maximum mark from each branch. , You can make use of the JOIN concept
select stu.* 
from student_details stu 
join 
(  select department,max(total_marks) as max 
   from student_details 
   group by department
) rank 
on stu.department=rank.department and stu.total_marks=rank.max;

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how display record from table to gridview on page load and also search record for particular fields using textbox vb.net


Tag : asp.net , By : John Miller
Date : March 29 2020, 07:55 AM
I hope this helps you . I assume the variables are set to NULL when not filtered? That would cause the LIKEs to fail, since X LIKE NULL cannot be true.
SELECT
  a1_admins.EmployeeId, a1_admins.Firstname, a1_admins.Lastname, a1_admins.Email, 
  a1_admins.City, a1_admins.State, a1_admins.Country, aspnet_Membership.LastLoginDate, 
  aspnet_Membership.CreateDate, a1_admins.Password, a1_admins.pan_no, a1_admins.Contactno, a1_admins.Address 
FROM a1_admins 
INNER JOIN aspnet_Membership ON a1_admins.UserId = aspnet_Membership.UserId 
WHERE (a1_admins.EmployeeId LIKE N'%' + @EmployeeId + N'%') 
   OR (a1_admins.City LIKE N'%' + @City + N'%') 
   OR (a1_admins.State LIKE N'%' + @State + N'%') 
   OR (a1_admins.Country LIKE N'%' + @Country + N'%')
   OR (Coalesce(@employeeid,@city,@state,@country) is null)

Update huge record in vertica from impala


Tag : development , By : Enrique Anaya
Date : March 29 2020, 07:55 AM
it fixes the issue Create table B in Vertica with 20 columns, like in impala.
Build a Java program that connects both to impala and Vertica. In that program, bulk read SELECT * FROM impala.B into arrays in memory, and use that same memory as host variables for the target statement INSERT /*+DIRECT */ INTO vertica.B VALUES(?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?,?).
MERGE /*+DIRECT*/
INTO A t
USING stg_A s
 ON s.id         = t.id
WHEN MATCHED THEN UPDATE SET
  id    = s.id
, col02 = s.col02
, col03 = s.col03
, col04 = s.col04
, col05 = s.col05
[...]    
    , col50 = s.col50
WHEN NOT MATCHED THEN INSERT VALUES (
  s.s.id
, s.s.col02
, s.s.col03
, s.s.col04
, s.s.col05
, s.[...]
, s.s.col50
);

laravel | Typeahead : How to combine db fields for display and get selected record's id?


Tag : javascript , By : Vitalik
Date : March 29 2020, 07:55 AM
I wish this help you The reason you're only getting the first_name is because you're only selecting the first name, select("first_name as name"), remove the select from the query and you'll be returned a collection with all of the fields
e.g.
$data = customer::where("first_name","LIKE","%{$request->input('query')}%")->orderBy('first_name')->take(6)->get();
$('input.typeahead').typeahead({
    source: {
        groupName: {
            // Ajax Request
            ajax: {
                url: "{{ route('autocomplete') }}"
            }
        }
    },
    callback: {
        onResult: function (node, query, result, resultCount, resultCountPerGroup) {
            console.log(node, query, result, resultCount, resultCountPerGroup);
        }
    }
});

Impala/SQL How can I put all the orther fields on a group by statement?


Tag : sql , By : Dmitry
Date : March 29 2020, 07:55 AM
wish helps you I have a query grouped by 3 fields against 100 fields table. How can I put the another 97 fields in the select without a join? , Use window functions:
select t.*
from (select t.*, max(d) over (partition by a, b, c) as max_d
      from mytable t
where d = max_d;

Join two tables on id fields using Impala


Tag : sql , By : dyarborough
Date : March 29 2020, 07:55 AM
Any of those help I have two tables in in HDFS that I want to join using Impala. One is Employee_Logs the other is HR_Data. , Probably the safest method is multiple left joins:
select el.*,
       coalesce(h.name, hv.name, hb.name) as name
from employee_logs el left join
     hr_data h
     on el.employee_id = h.employee_id left join
     hr_data hv
     on el.employee_id = concat(h.employee_id, 'v') left join
     hr_data hb
     on el.employee_id = concat(h.employee_id, 'b');
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