Problems with "Select Distinct" Statement

Hi... I've a little problem with my SQL Statement...
I've a Table in a DataBase with Solds of the Month... the fields are: vta_fecha, vta_prod, vta_total, vta_mesa.
I've to Select only the distincts fields of vta_prod... selected by vta_fecha and vta_mesa...
My code is like this:         try{
            Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
            conec = DriverManager.getConnection("jdbc:odbc:Driver={Microsoft Access Driver (*.mdb)};DBQ=C:/POOL/Data/BaseDat.MDB");
            state = conec.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE,ResultSet.CONCUR_READ_ONLY);try{
            rec = state.executeQuery("Select DISTINCT vta_prod, vta_fecha, vta_mesa from Ventas where vta_fecha = #" + Fecha_q + "# And vta_mesa = 0");
            rec.first();
            int x = 0;
            while (rec.isAfterLast()==false){
                x++;
                rec.next();
            rec.first();
            if (x > 0){
                Productos = new String[x];
                Total_Vta = new int[x];
                Cant_Prod = new int[x];
                x = 0;
                while (rec.isAfterLast() == false){
                    Productos[x] = rec.getString("vta_prod");
                    rec.next();
                    x++;
            else{
                Productos = new String[0];
                Total_Vta = new int[0];
                Cant_Prod = new int[0];
        }catch(Exception e){JOptionPane.showMessageDialog(null,e.getMessage());}Now, in the Table I have only 3 diferents vta_prod, but this Statement returns 9 Rows... and I don't know why...
Please help me...
Regards...

I don�t have a complete picture because I don�t know what values you are passing in the select and I don�t know your column types but this is what I think is happening from what you have shared.
You may have misunderstood what the DISTINCT keyword does.
The DISTINCT keyword applies to the full set of columns in the select (not just the first column). So in your case it would be equivalent to:
SELECT vta_prod, vta_fecha, vta_mesa
FROM Ventas
WHERE ...
GROUP BY by vta_prod, vta_fecha, vta_mesa
So, it doesn't matter that you only have 3 distinct vta_prod values if you have multiple values being returned in the other columns. The vta_mesa column can only a return a single value as �0�. That leaves the vta_fecha column which is probably a date/time column and is probably the column that is returning the three other distinct values (one date with three distinct times).
(3 vta_prod) x (3 vta_fecha) x (1 vta_mesa) or 3x3x1 = 9 rows
So find a way to strip the time from vta_fecha in your select statement and your SQL should return the results you expect. I�m not an Access expect but I think I remember you can use something like the �Convert� or �DatePart� functions to make that happen (check your documentation to be sure)..
A couple of asides;
1) You should use a PreparedStatement and rarely if ever use Statement.
2) You should start Java variable names with lower case.

Similar Messages

"connect by" problem with "select distinct"

When I run the following SQL (using "Scott" DB):
select *
from emp
where deptno = 30 or mgr is null
start with mgr is null
connect by prior empno = mgr
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I get the results one would expect. The President is first and all those reporting to him/her are listed in correct sequence.
EMPNO,ENAME,JOB,MGR,HIREDATE,SAL,COMM,DEPTNO
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7654,MARTIN,SALESMAN,7698,9/28/1981,1250,1400,30
7844,TURNER,SALESMAN,7698,9/8/1981,1500,0,30
7521,WARD,SALESMAN,7698,2/22/1981,1250,500,30
Why would adding "distinct" to the select cause the result to be sorted STRICTLY by ename (per "order siblings by...")?
Finally, if I "select distinct" but don't specify any "order" I get this, in NO APPARENT order:
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7521,WARD,SALESMAN,7698,2/22/1981,1250,500,30
7654,MARTIN,SALESMAN,7698,9/28/1981,1250,1400,30
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7839,KING,PRESIDENT,,11/17/1981,5000,,10
7844,TURNER,SALESMAN,7698,9/8/1981,1500,0,30
7900,JAMES,CLERK,7698,12/3/1981,950,,30
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you have to specify what is going to be the distict field.No you don't. DISTINCT keyword applies to the whole SELECT list. See your own link.
In any case this does not appear to have anything to do with what you SELECT, rather that the SORT UNIQUE caused by the DISTINCT keyword appears to prevent the ORDER SIBLINGS BY clause from working correctly.
Not really sure why you need DISTINCT in this example, no doubt this is being applied elsewhere. Given that you have duplicates in the rowset and that hierarchical query now supports views, perhaps it would be more efficient to apply DISTINCT keyword first, something like...
SELECT e.*
FROM (SELECT DISTINCT e.*
FROM emp e
WHERE e.deptno = 30
OR e.mgr IS NULL) e
START WITH e.mgr IS NULL
CONNECT BY PRIOR e.empno = e.mgr
ORDER SIBLINGS BY e.ename;
Alternatively you could skip ORDER SIBLINGS BY clause and use SYS_CONNECT_BY_PATH function to get your order, something like...
SELECT e.*
FROM (SELECT DISTINCT e.*,
SYS_CONNECT_BY_PATH () path
FROM emp e
WHERE e.depno = 30
OR e.mgr IS NULL
START WITH e.mgr IS NULL
CONNECT BY PRIOR e.empno = e.mgr) e
ORDER BY e.path
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[OraException]()
Oracle.DataAccess.Client.OraException.HandleErrorHelper(Int32 errCode, OraConnection conn, IntPtr opsErrCtx, IntPtr opsSqlCtx, Object src, String procedure) +639
Oracle.DataAccess.Client.OraCommand.ExecuteReader(+737)
Oracle.DataAccess.Client.OraCommand.ExecuteReader(CommandBehavior behavior) +8
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This issue is same as the one mentioned in the thread with title "Problem with 'Select distinct'" and the fix would be available in the next release.

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http://download-uk.oracle.com/docs/cd/B10501_01/server.920/a96540/functions105a.htm#86312
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dnikiforov

I refurbished my macbook air 7 months ago because there was a problem with the steady state drive. Now my battery seems to be dead again. How long does the warranty last? Do I need to pay for a new battery?

I refurbished my macbook air 7 months ago because there was a problem with the steady state drive. Now my battery seems to be dead again. How long does the warranty last? Do I need to pay for a new battery?

As I wrote Apple will diagnose an Apple product even if it is out of warranty for free. That should be your first step to find out if the problem is the battery or something else.
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I first apologize for using Google Translate :-(
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I've moved your post to the DPS forum.
I'm afraid the way you're doing this is not going to work with DPS.
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Hi!
I've got a problem with analitic functions (I'm newbie in this topic).
I have a table gpw_notowania which have colums: not_open, not_minimum, not_maximum, not_close, not_volume, not_sp_id and not_date.
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This is an interesting question.
create table SortWithDistinct(Val1,Val2,sortKey,SubSortKey) as
select 1,3,10,1 from dual union all
select 1,3,10,1 from dual union all
select 1,3,10,1 from dual union all
select 2,4,30,2 from dual union all
select 2,4,30,2 from dual union all
select 3,5,20,1 from dual union all
select 3,5,20,1 from dual union all
select 4,6,10,3 from dual union all
select 5,5,10,2 from dual union all
select 5,5,10,2 from dual union all
select 9,9,10,4 from dual union all
select 6,4,20,2 from dual union all
select 6,4,20,2 from dual union all
select 7,3,30,1 from dual union all
select 7,3,30,1 from dual;
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from SortWithDistinct
order by sortKey,SubSortKey;
ORA-01791: not a SELECTed expressionIt is one way that we use "group by".
for instance
select Val1,Val2
from SortWithDistinct
group by Val1,Val2
order by max(sortKey),max(SubSortKey);
Val1 Val2
   1     3
   5     5
   4     6
   9     9
   3     5
   6     4
   7     3
   2     4It is one way that we use "Inline View".
for instance
select Val1,Val2
from (select distinct Val1,Val2,sortKey,SubSortKey
from SortWithDistinct)
order by sortKey,SubSortKey;
Furthermore, we may use below alternative solution which uses "dense_Rank".
select Val1,Val2
from (select distinct Val1,Val2,
      dense_Rank() over(order by sortKey,SubSortKey) as willSortKey
        from SortWithDistinct)
order by willSortKey;Because "distinct" works after OLAP.
for instance
SQL> select distinct ColA,ColB,Row_Number() over(order by 1) as Rank
2 from (select 1 as ColA,1 as ColB from dual
3 union all select 1,1 from dual
4 union all select 1,1 from dual
5 union all select 1,1 from dual
6 union all select 2,2 from dual
7 union all select 2,2 from dual
8 union all select 2,2 from dual)
9 order by 1,2,3;
ColA ColB Rank
   1     1     1
   1     1     2
   1     1     3
   1     1     4
   2     2     5
   2     2     6
   2     2     7my site :-)
http://www.geocities.jp/oraclesqlpuzzle/1-6.html

Problem with selecting remote tables.

Hi, im having problems with one select...
Running select, in which i select tables from remote DB, takes not more then 2 seconds, retrieving few rows.
1) When i try to "create table as" using that select it takes about 1 minute to run.
2) Trying "merge into" my table using that select takes more that 5 minutes, ... replacing the select within merge by newly created temporary table (point 1) works fine - takes few seconds to run.
So why simple select takes few seconds, creation of table using that select takes one minute and merge using that select takes 5minutes to run ?
Thanks for any ideas
Plan hash value: 1936184599
| Id | Operation                             | Name                        | Rows | Bytes | Cost (%CPU)| Time     | Pstart| Pstop | Inst   |IN-OUT|
|   0 | MERGE STATEMENT                       |                             |     1 |   642 |    84 (12)| 00:00:02 |       |       |        |      |
|   1 | MERGE                                | NP_HT_REC        |       |       |            |          |       |       |        |      |
|   2 |   VIEW                                |                             |       |       |            |          |       |       |        |      |
|   3 |    NESTED LOOPS OUTER                 |                             |     1 | 8637 |    84 (12)| 00:00:02 |       |       |        |      |
|* 4 |     HASH JOIN                         |                             |     1 | 8244 |    81 (13)| 00:00:01 |       |       |        |      |
|* 5 |      HASH JOIN                        |                             |     1 | 4220 |    60 (10)| 00:00:01 |       |       |        |      |
|* 6 |       HASH JOIN                       |                             |     1 | 4182 |    56   (9)| 00:00:01 |       |       |        |      |
|   7 |        NESTED LOOPS                   |                             |     1 | 4134 |    41 (10)| 00:00:01 |       |       |        |      |
|* 8 |         HASH JOIN                     |                             |     1 | 4109 |    40 (10)| 00:00:01 |       |       |        |      |
|   9 |          REMOTE                       | HT_REC              |     2 |   170 |    11   (0)| 00:00:01 |       |       |   NP | R->S |
| 10 |          VIEW                         | VW_SQ_3                     |   806 | 3167K|    29 (14)| 00:00:01 |       |       |        |      |
| 11 |           SORT GROUP BY               |                             |   806 | 96720 |    29 (14)| 00:00:01 |       |       |        |      |
| 12 |            MERGE JOIN                 |                             |   806 | 96720 |    28 (11)| 00:00:01 |       |       |        |      |
| 13 |             SORT JOIN                 |                             |     2 |   170 |    12   (9)| 00:00:01 |       |       |        |      |
| 14 |              REMOTE                   | HT_REC              |     2 |   170 |    11   (0)| 00:00:01 |       |       |   NP | R->S |
|* 15 |             SORT JOIN                 |                             | 7100 |   242K|    16 (13)| 00:00:01 |       |       |        |      |
| 16 |              REMOTE                   | T_UR_BUS               | 7100 |   242K|    14   (0)| 00:00:01 |       |       |   NP | R->S |
| 17 |         REMOTE                        | T_UR                      |     1 |    25 |     1   (0)| 00:00:01 |       |       |   NP | R->S |
| 18 |        REMOTE                         | T_UR_BUS               | 7100 |   332K|    14   (0)| 00:00:01 |       |       |   NP | R->S |
| 19 |       REMOTE                          | HT_BUS                 |     3 |   114 |     3   (0)| 00:00:01 |       |       |   NP | R->S |
| 20 |      VIEW                             | VW_SQ_4                     |     2 | 8048 |    21 (20)| 00:00:01 |       |       |        |      |
| 21 |       REMOTE                          |                             |       |       |            |          |       |       |   NP | R->S |
| 22 |     PARTITION RANGE ITERATOR          |                             |     2 |   786 |     3   (0)| 00:00:01 |   KEY |   KEY |        |      |
| 23 |      TABLE ACCESS BY LOCAL INDEX ROWID| NP_HT_REC        |     2 |   786 |     3   (0)| 00:00:01 |   KEY |   KEY |        |      |
|* 24 |       INDEX RANGE SCAN                | NP_HT_REC_IDX_UK |     2 |       |     1   (0)| 00:00:01 |   KEY |   KEY |        |      |
Predicate Information (identified by operation id):
   4 - access("HB"."CHANGE_DATE"="VW_COL_1" AND "TUB"."BUNDLE_ID"="BUNDLE_ID")
       filter("ROWID"=ROWID)
   5 - access("TUB"."BUNDLE_ID"="HB"."BUNDLE_ID")
       filter("TUB"."DATE_CHANGE">="HB"."CHANGE_DATE")
   6 - access("HR"."USER_ID"="TUB"."USER_ID" AND "TUB"."DATE_CHANGE"="VW_COL_1")
       filter("HR"."CHANGE_DATE">="TUB"."DATE_CHANGE")
   8 - access("HR"."USER_ID"="USER_ID")
       filter("ROWID"=ROWID)
15 - access(INTERNAL_FUNCTION("HR"."CHANGE_DATE")>=INTERNAL_FUNCTION("TUB"."DATE_CHANGE"))
       filter(INTERNAL_FUNCTION("HR"."CHANGE_DATE")>=INTERNAL_FUNCTION("TUB"."DATE_CHANGE"))
24 - access("RES"."CHANGE_ID"(+)=TO_NUMBER(TO_CHAR("HR"."CHANGE_ID")) AND "RES"."REC_ID"(+)=TO_NUMBER(TO_CHAR("HR"."REC_ID")) AND
              "RES"."SCHEDULE_ID"(+)=TO_NUMBER(TO_CHAR("HR"."SCHEDULE_ID")) AND "RES"."USER_ID"(+)=TO_NUMBER(TO_CHAR("HR"."USER_ID")) AND
              "RES"."CHANGE_DATE"(+)=TO_DATE(INTERNAL_FUNCTION("HR"."CHANGE_DATE"),'dd.mm.yyyy hh24:mi:ss'))

Have tried hint /*+NO_QUERY_TRANSFORMATION*/ and it is working fine now = 2seconds for merge :) Have no idea why is that, but it works
thanks
d.

Problem with the FOR statement.....again!

Hi everyone,
Well I'm still trying to do a car slideshow using external
files and can't seem to see the end. The current movie is here:
http://www.virtuallglab.com/projects.html
I also attach the code. My problem is I had originally set up
an animation with 2 pictures sliding in with some text, and then
wait 4 seconds before sliding out, and then next pictures and text
would slide in and so on, using a setInterval.
The problem is the FOR loop seems to skip the setInterval and
the function "wait", so it just loops quickly and jumps to last
picture, so on the example above, it just slides the last picture
(i=9) and that's it!
Can you not include another function within a FOR statement.
Or is there a way to tell the FOR loop to wait until all motion is
finished?
Any help greatly appreciated
import mx.transitions.*;
import mx.transitions.easing.*;
for (i=0; i<10 ; i++) {
var picLeft = "pics/"+i+".jpg";
var picRight = "pics/"+i+"b.jpg";
var txtToLoad = "text/"+i+".txt";
this.createEmptyMovieClip("leftHolder",1);
leftHolder.loadMovie(picLeft,i,leftHolder.getNextHighestDepth());
leftHolder._x = -200;
leftHolder._y = 15;
var leftTween:Tween = new Tween(leftHolder, "_x",
Strong.easeOut, leftHolder._x, 10, 2, true);
this.createEmptyMovieClip("centerHolder",2);
centerHolder.loadMovie(picRight,i+"b",centerHolder.getNextHighestDepth());
centerHolder._x = 180;
centerHolder._y = 250;
var centerTween:Tween = new Tween(centerHolder, "_y",
Strong.easeOut, centerHolder._y, 15, 2, true);
text._x = 600;
myData = new LoadVars();
myData.onLoad = function(){
text.carText.text = this.content;
myData.load(txtToLoad);
var textTween:Tween = new Tween(text, "_x", Strong.easeOut,
text._x, 420, 2, true);
myInterval = setInterval(wait, 4000);
function wait() {
var leftTweenFinished:Tween = new Tween(leftHolder, "_x",
Strong.easeOut, leftHolder._x, -200, 1, true);
var centerTween:Tween = new Tween(centerHolder, "_y",
Strong.easeOut, centerHolder._y, 250, 1, true);
var textTween2:Tween = new Tween(text, "_x", Strong.easeOut,
text._x, 600, 1, true);
clearInterval(myInterval);
***************************************************************************************** ***

There is no way to tell a for loop to wait. That is not what
they do.
The entire for loop will execute (if possible, and it doesn't
enter some kind of continuous infinite loop) completely before each
time the frame is rendered.
If you want to spread things out over time you need to use
the setInterval -- but not inside a for loop! If you do that you
immediately set however many intervals as your loop has. In this
case you will also assign the ids for those intervals to the same
variable, effectively overwriting the value so you will never be
able to clear most of those intervals.
So you need to rethink you whole structure. Set up some kind
of counter and limit like this:
var slidesToShow:Number=10;
var curSlide:Number=0;
Then have your setInterval increment the curSlide each time
it is called and check to see if it has shown all of them. That is
where your "loop" comes in.
As for the other part of your question -- yes you actually
have two different issues going on -- again you cannot make a for
loop wait for anything. So no there is no way to pause it while you
wait for your tween to end. But you can be notified when a tween
ends.
Check out the documentation about the tween class in the help
files. There you will find the onMotionFinished event. So you can
set up one of those to start whatever needs to be started when the
tween has finished.
You should also use the MovieClipLoader class to load your
images, because you have no idea how long it will take to load
them. Using that class you get a nice event (onLoadInit) that tells
you when the asset is ready to be used.
Finally I'm thinking you might want to use setTimeout instead
of setInterval. It only goes once, while setInterval repeats
forever. So I would think your algorithm would be something like
this.
1. load external asset
2. when ready animate in and set onMotionFinished handler
3. when motion is finished start loading next asset and
setTimeout for 4 seconds.
4. when 4 seconds is up or the clip is loaded (which ever
takes longer) go to 2 and repeat.
If this is going to be run locally on a hard drive or CD you
won't have any problem with the length of time it takes to load the
external assets, but if it is over the web it will take time.

Problems with "Select Distinct" Statement

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