Question

I have this query

select * from openQuery(hades,"select to_char(T$STDT,'dd-Mon-YYYY') stdt,to_char(T$TDAT,'dd-Mon-YYYY') tdat
    ,fdG2J(T$TDAT)-fdG2J(t$stdt) diff,T$DISC 
    ,fdG2J(Sysdate) nSysD
    ,fdG2J(t$stdt) nStdt
    ,fdg2J(t$tdat) nTdat
    from BAAN.TTDSLS031020 
where T$CUNO='000022' and TRIM(T$CPGS)='1AA00'
--and fdG2J(sysdate) between fdG2J(t$stdt) and fdG2J(t$stdt) 
");

and returns the following result (not that the last line of the where clause is commented out).

STDT        TDAT        DIFF        T$DISC  NSYSD   NSTDT   NTDAT
01-Mar-12   11-Mar-12   10010       40  2455990063  2455988061  2455998071
02-Mar-12   02-Mar-12   0           50  2455990063  2455989062  2455989062
06-Mar-12   11-Mar-12   5005        60  2455990063  2455993066  2455998071
11-Mar-12   11-Mar-12   0           70  2455990063  2455998071  2455998071
18-Jul-39   01-Jan-12   2907496166  80  2455990063  2465988199  5373484365
15-Dec-85   01-Jan-12   2817496016  80  2455990063  2555988349  5373484365

and whe I apply the commented between clause , the query returns no results (through sql2008 linked server)

and when I run the same query from Sql Developer (Oracle)

I get the first row

what is intriguing is:
a) why does this return different results when executed in different environments (although the server running the query is same server)?
b).why dos not between clause do not return expected result ?

Answer 1

I don’t know the indended functionality of fdG2J(), but in the BETWEEN clause, you use the same function call and argument value for both. Therefore, both return the same value and fdG2J(sysdate) would need to be exactly equal rather than between the range points.

and fdG2J(sysdate) between fdG2J(t$stdt) and fdG2J(t$stdt) 
-- -                            ^^^^^^^^  Same as ^^^^^^^^

Perhaps you intended:

and fdG2J(sysdate) between fdG2J(t$stdt) and fdG2J(T$TDAT)