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Full Discussion: Replace sql with dynamic values
Top Forums Shell Programming and Scripting Replace sql with dynamic values Post 303007474 by Master_Mind on Friday 17th of November 2017 04:50:43 AM
Old 11-17-2017
Replace sql with dynamic values
Hi Guys,

I am using a function to replace the values dynamically to frame sql query by reading a file. My file will have column names like

Code:
file.txt
col_1
col_2

expected output:

Code:
select id,col_1,col_2 from (
select a.id,
a.col_1,
rank() over (ORDER BY cast(a.col_1 AS double) DESC) AS col_1_rank,
a.col_2,
rank() over (ORDER BY cast(a.col_2 AS double) DESC) AS col_2_rank
from table_name a )t
join 
( 
SELECT count(case when col_1='.' then null else 1 end) AS col_1_count,
count(case when col_2='.' then null else 1 end) AS col_2_count				
FROM   table_name
) f
where t.col_1_rank < 0.0001*f.col_1_count or t.col_2_rank < 0.0001*f.col_2_count;

where ever i am using col_1 and col_2 that should be read from the file and get replaced , there is a possibility that more columns will be added in file.txt but the query structure remains the same

Code:
sql_query {
while read -r col do
printf 'select id,%s,%s from (
select a.id,
a.%s,
rank() over (ORDER BY cast(a.%s AS double) DESC) AS %s_rank,
a.%s,
rank() over (ORDER BY cast(a.%s AS double) DESC) AS %s_rank
from table_name a )t
join 
( 
SELECT count(case when %s='.' then null else 1 end) AS %s_count,
count(case when %s='.' then null else 1 end) AS %s_count				
FROM   table_name
) f
where t.%s_rank < 0.0001*f.%s_count or t.%s_rank < 0.0001*f.%s_count;'
done < $1 # this will be file.txt as parameter

}

Last edited by Master_Mind; 11-17-2017 at 05:51 AM.. Reason: change in code
 

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LEARN ABOUT MOJAVE

ttk::frame

ttk::frame(n)							 Tk Themed Widget						     ttk::frame(n)

__________________________________________________________________________________________________________________________________________________

NAME

       ttk::frame - Simple container widget

SYNOPSIS

       ttk::frame pathName ?options?
_________________________________________________________________

DESCRIPTION

       A ttk::frame widget is a container, used to group other widgets together.

STANDARD OPTIONS

       -class		     -cursor		  -takefocus
       -style

       See the ttk_widget manual entry for details on the standard options.

WIDGET-SPECIFIC OPTIONS
       [-borderwidth borderWidth]  The desired width of the widget border.  Defaults to 0.  [-relief relief] One of the standard Tk border styles:
       flat, groove, raised, ridge, solid, or sunken.  Defaults to flat.  [-padding padding] Additional padding  to  include  inside  the  border.
       [-width width]  If specified, the widget's requested width in pixels.  [-height height] If specified, the widget's requested height in pix-
       els.

WIDGET COMMAND

       Supports the standard widget commands configure, cget, identify, instate, and state; see ttk::widget(n).

NOTES

       Note that if the pack, grid, or other geometry managers are used to manage the children of the frame, by the GM's requested size will  nor-
       mally take precedence over the frame widget's -width and -height options.  pack propagate and grid propagate can be used to change this.

SEE ALSO

       ttk::widget(n), ttk::labelframe(n), frame(n)

KEYWORDS

       widget, frame, container

Tk									8.5							     ttk::frame(n)
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