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R - how to sum each columns from df


By : GANESH PRASAATH L
Date : October 18 2020, 06:10 PM
Any of those help I have this df , You can use summarise_at() to ignore id and sum the rest:
code :
df %>%
  group_by(month) %>%
  summarise_at(vars(-id), list(sum = ~sum))

# A tibble: 3 x 3
  month gas_sum tickets_sum
  <int>   <int>       <int>
1     1      30          22
2     2       4           5
3     3       0           9


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Query to find the record with most matching columns, where the number of columns and names of columns is unknown?


By : Nuno Alexandre
Date : March 29 2020, 07:55 AM
wish of those help
There could be 4 columns, or there could be 7 columns.... I'm actually writing a function.
code :
-- this is the data table to match against
create table t1 (
    id int,
    col1 varchar(10),
    col2 varchar(20),
    col3 nvarchar(40));
insert t1
select 6, 'abc', 'def', 'zzz' union all
select 8, null , 'def', null;

-- this is the data with the row you want to match
create table t2 (
    id int,
    col1 varchar(10),
    col2 varchar(20),
    col3 nvarchar(40));
insert t2
select 0, 'abc', 'def', 'ghi';
GO
;with unpivoted1 as (
    select n.n.value('local-name(.)','nvarchar(max)') colname,
           n.n.value('.','nvarchar(max)') value
    from (select (select * from t2 where id=0 for xml path(''), type)) x(xml)
    cross apply x.xml.nodes('//*[local-name()!="id"]') n(n)
), unpivoted2 as (
    select x.id,
           n.n.value('local-name(.)','nvarchar(max)') colname,
           n.n.value('.','nvarchar(max)') value
    from (select id,(select * from t1 where id=outr.id for xml path(''), type) from t1 outr) x(id,xml)
    cross apply x.xml.nodes('//*[local-name()!="id"]') n(n)
)
select TOP(1) WITH TIES
       B.id,
       sum(case when A.value=B.value then 1 else 0 end) matches
from unpivoted1 A
join unpivoted2 B on A.colname = B.colname
group by B.id
having max(case when A.value <> B.value then 1 end) is null
ORDER BY matches;
| ID | MATCHES |
----------------
|  8 |       1 |

table with resizable columns, should have columns added / removed dynamically & sortable values with in columns


By : Ajay Tapodhan
Date : March 29 2020, 07:55 AM
help you fix your problem You can use ng-grid and customize it accordingly. However, we have used jqx library since it has many other items including grid-
Link for grid- http://www.jqwidgets.com/jquery-widgets-demo/demos/jqxgrid/index.htm?(arctic)

Extjs Grids with Locked columns, columns missing in grid.columns property


By : Will Jofferies
Date : March 29 2020, 07:55 AM
fixed the issue. Will look into that further Extjs Locked columns feature changes how the grid is stored in the Extjs Application tree.
Suppose you have a grid of 5 columns and you lock leftmost 2. Then Extjs internally divides your grid into two grids having 2 and 3 columns respectively. Therefore your code should be :
code :
var grid = this.grid.items.items[0];
var columns = grid.columns;
for(var i=0;i<columns.length;i++)
  {
//do something with columns[i];
}

var grid = this.grid.items.items[1];
var columns = grid.columns;
for(var i=0;i<columns.length;i++)
  {
//do something with columns[i];
}

Hive/SQL bundling columns for few columns,rest of the columns are pull based lowest/highest of other columns


By : Ashu Sharma
Date : March 29 2020, 07:55 AM
this will help i have a hive table as below with 5 columns
code :
select name, orderno,  productcategory,  amount,   description 
from 
(
select name, orderno, productcategory, 
       sum(amount) over(partition by name, productcategory) amount, 
       first_value(description) over(partition by name, productcategory order by orderno desc) description,
       row_number() over (partition by name, productcategory order by orderno) rn
from  your_table
)s where rn=1; --pick lowest orderno 
OK
KJFSFKS 1       1       40      D1
KJFSFKS 2       2       127     D4
KJFSFKS 5       3       13      D7
KJFSFKS 8       4       8       D8
KJFSFKS 9       5       18      D10
Time taken: 12.492 seconds, Fetched: 5 row(s)

Why showing error Wrong number of columns! COPYing 99 columns from a source file containing: FEWER columns


By : Mattaphorica
Date : March 29 2020, 07:55 AM
To fix this issue Why showing error Wrong number of columns! Copying 99 columns from a source file containing: FEWER columns.Tried to COPY and loader return error, BUT I count column in row loaded normally - 99 and column in reject row 99. , did choose variant with fjsonparser
for example
code :
cursor.copy("copy %s.%s from stdin parser fjsonparser() REJECTED DATA '/home/dbadmin/temp/rejected_data_%s.txt' EXCEPTIONS '/home/dbadmin/temp/exceptions_%s.txt'" %(SCHEMA_NAME, TABLE_NAME, TABLE_NAME, TABLE_NAME),json_file)
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