Question

I have an sql query in which I have table named attan for the attendance and column named
S_TIME in which I stored in time and out time with a setting a flag of in with I and for O

Now I am trying to get in time as well as out time using the flag. I have written a query but result from this query are making some wrong sense.

Here is my query

SELECT X.AC_NO, X.IN_TIME, Y.OUT_TIME, X.S_DTE, X.CHK_IN, Y.CHK_OUT
  FROM (SELECT A.AC_NO, A.S_TIME IN_TIME, A.AC_CHECKTYPE CHK_IN, A.S_DTE
          FROM ATTN A
         WHERE A.AC_CHECKTYPE = 'I' AND A.S_DTE = :P_DTE) X,
       (SELECT B.AC_NO, B.S_TIME OUT_TIME, B.AC_CHECKTYPE CHK_OUT
          FROM ATTN B
         WHERE B.AC_CHECKTYPE = 'O' AND B.S_DTE = :P_DTE) Y
 WHERE X.AC_NO = Y.AC_NO(+)

Through this query I always get the number of records of the employees who are in and only get 2 number of reocrds with out time.

Whereas in table there are 234 number of emps who are in and 256 are out but results don’t match the data.

Please any one help me if any problem in my query.

Answer 1

SUGGESTION:

1. Run the subselects and see if you’re getting all the rows you expect, with and without the “A.S_DTE = :P_DTE” date filter:

   SELECT A.AC_NO, A.S_TIME IN_TIME, A.AC_CHECKTYPE CHK_IN, A.S_DTE
FROM ATTN A
WHERE A.AC_CHECKTYPE = 'I' AND A.S_DTE = :P_DTE

2. My first guess is that maybe you have a datetime, and unless the hours/minutes/seconds match exactly, you won’t get the row. You can use to_char() to have just the “date” portion in your “from”:

   http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:204714700346328550

3. In any case, seeing what rows you do (and don’t) get in the subqueries should show you what’s wrong with the complete query.

Please post back what you find!