Re: [EXTERNAL] records between two dates

[Sam_L <lennon_s_j@xxxxxxxxxxx>]

Jerry,

In SQL single quotes go around character constants.  They are not needed 
for numeric data.

Also you don't need DIGITS, because that converts numeric to character. 
You want to stick with numeric.


Here is a *final* proof of concept for you to digest.  All this SQL runs 
successfully and produces the expected results of 3 records from both 
the file and the view.

If your results from the real data don't match, then you have made an 
error somewhere,but since we can't see the real code, there is no more 
help possible.



-- drop existing table and view
drop table lennons1.file1
;

-- create a test table
create or replace table lennons1.file1 (
     field1 decimal (2 , 0),
     field2 decimal (2 , 0),
     field3 decimal (2 , 0),
     field4 decimal (2 , 0),
     afield char(20)
 )
;

-- create some test data
 insert into lennons1.file1
    values
        (19,98,12,25, 'rcd 1'),
        (00,01,12,31, 'rcd 2'),
        (20,21,06,01, 'rcd 3*'),
        (20,21,06,05, 'rcd 4*'),
        (20,21,06,07, 'rcd 5*'),
        (20,21,06,08, 'rcd 6'),
        (20,21,06,31, 'rcd 7'),
        (20,21,12,25, 'rcd 8'),
        (99,99,12,31, 'rcd 9')
    ;

-- Review created data
select * from lennons1.file1
;
 -- Create a view
CREATE or replace VIEW lennons1.V1 AS (
    SELECT
        decimal(
             (FIELD1*1000000)  +
             (FIELD2*10000)  +
             (FIELD3*100)   +
             FIELD4
        ,8,0) as mydate
        ,A.*
    FROM lennons1.FILE1  A
)
;

-- Prove the view works
select * from lennons1.V1
;

-- Count rows in view
select count(*) from lennons1.V1
;

-- select from the view the desired date range
select * from lennons1.V1
where mydate between 20210601 and 20210607
;

-- select from the file the desired date range
select * from lennons1.file1
where (FIELD1*1000000)  +
             (FIELD2*10000)  +
             (FIELD3*100)   +
             FIELD4
between 20210601 and 20210607;



On 7/4/2022 3:50 PM, jerry ven wrote:
> Hi,
>
> I just meant there is difference of too many records for below two SQL
> queries:-
>
> SELECT * FROM LIB1/file1  wherE ((field1* 1000000) + ( field2*10000) +
> (field3*100) + field4)  betweeN
> '20210601'  and  '20210607'
>
>
> select count(*) from lib1/v1 where MYDATE  between '20210601'  and  '20210607'
>
>
> And it does not matter whether i keep single quotes around these date
> numbers or not , difference of many records remain always.
>
>
> Thanks