带分组的Oracle SQL不会返回任何内容

Question

I've got a problem.

Here is my query:

SELECT TO_CHAR(TRUNC(reg_date,'dd'),'DD.MM.YYYY') AS "DATE", 
       COUNT(*)
  FROM tablename
 WHERE reg_date >= TO_DATE('01.08.2013') AND 
       reg_date <= TO_DATE('28.08.2013')
GROUP BY TRUNC(reg_date,'dd')

In this query I'm counting amount of registered events at one date, but it returns zero with filled table. What is the problem?

Answer 1

Well, guys I did it! i changed my query and it works:

SELECT TO_CHAR(TRUNC(scheme.table.reg_date,'dd'),'DD.MM.YYYY') AS "DATE", COUNT(*)
FROM scheme.table
WHERE scheme.table.reg_date
BETWEEN TO_DATE('01.08.2013','dd.mm.yyyy') AND TO_DATE('28.08.2013','dd.mm.yyyy')
GROUP BY TRUNC(scheme.table.reg_date,'dd');

I figured out that TOAD is linking current scheme and Oracle SQL developer - no that is why I have to set schema directly