Max function error

Hello all!
I'm stuck on this problem. I'm probably missing something obvious but I would appreciate the help. I have a query that returns three rows:
SELECT 1 + 1 value1 FROM DUAL
UNION ALL
SELECT 3 value1 FROM DUAL
UNION ALL
SELECT (3 + 5) / 2 value1 FROM DUAL;
The output is:
2
3
4
Now I want to find the max value of the output so I do this:
SELECT MAX(
SELECT 1 + 1 value1 FROM DUAL
UNION ALL
SELECT 3 value1 FROM DUAL
UNION ALL
SELECT (3 + 5) / 2 value1 FROM DUAL)
FROM DUAL;
ERROR at line 2:
ORA-00936: missing expression
Any ideas?
Thanks,
Shaorn

SELECT MAX(VALUE1) FROM
SELECT 1 + 1 value1 FROM DUAL
UNION ALL
SELECT 3 value1 FROM DUAL
UNION ALL
SELECT (3 + 5) / 2 value1 FROM DUAL)
FROM DUAL
);Cheers, APC
blog: http://radiofreetooting.blogspot.com
Edited by: APC on Aug 26, 2009 4:31 PM
fixed broken tag

Similar Messages

How to Avoid Errors in Max Function When Data Contains Blank Cells

I have a column with duration values. However, it also contains some blank cells. These "blank cells" have formulas in them, but as the cells they reference too are blank the formula doesn't produce a result.>/p>
I want to get the max value from this column. When I simply do =MAX(column-name) I get an error, presumably because some of the cells are blank. This table is going to be highly dynamic, so I don't want to limit the range of the MAX() function to only those cells with values.
So does anyone know a solution for this, please? If I was some how able to create a formula which returned the range of cells with actual values, then I could use that in the MAX() function. Or, if I could somehow tell the MAX() function to ignore blank cells, but I'm not sure either of these are possible.
Thanks,
Nic

I don't see a problem with "blank" (null string) cells mixed with duration cells. MAX works fine with this mix of cells. But if the "blank" cells are numbers, not text, that gives an error.
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Regarding MAX() function

Hi,
I am having table A. I have few records in the table A. Database version : 9.2
ID name deleted
2 XYZ N
3 ABD N
4 GJK N
5 GJK N
6 HGY N
7 YJG N
8 PIN N
9 BMF N
10 OLG N
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Kamran Agayev A. wrote:
Yes you can use TO_NUMBER inside MAX function and it will not give any error in the futureHave you tested it?
SQL> create table a (id,name,deleted)
2 as
3 select '2', 'XYZ', 'N' from dual union all
4 select '3', 'ABD', 'N' from dual union all
5 select '4', 'GJK', 'N' from dual union all
6 select '5', 'GJK', 'N' from dual union all
7 select '6', 'HGY', 'N' from dual union all
8 select '7', 'YJG', 'N' from dual union all
9 select '8', 'PIN', 'N' from dual union all
10 select '9', 'BMF', 'N' from dual union all
11 select '10', 'OLG', 'N' from dual
12 /
Tabel is aangemaakt.
SQL> select max(id)
2    from a
3   where deleted = 'N'
4 /
MA
9
1 rij is geselecteerd.
SQL> select max(to_number(id))
2    from a
3   where deleted = 'N'
4 /
                    MAX(TO_NUMBER(ID))
                                    10
1 rij is geselecteerd.
SQL> insert into a values ('2A', 'ABC', 'N')
2 /
1 rij is aangemaakt.
SQL> select max(to_number(id))
2    from a
3   where deleted = 'N'
4 /
select max(to_number(id))
FOUT in regel 1:
.ORA-01722: invalid numberRegards,
Rob.

Problem with max function in air

Hello ,how are you,I write this query : [b]SELECT *, max(trackerId) FROM sessiontracker [/b]in
sqlite manager and it works ,but when I use it in Air application ,it send me back this error:
ReferenceError: Error #1056: Cannot create property max(trackerId) on
com.afarinesh.models.SessionTracke
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I appreciate your help

Hello,
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Bug? using MAX() function on char(1) column returns something larger

details:
-- we have a complex nested query, where we are essentially returning the max() value into a variable
-- the max() function is being used on a char(1) column
-- where MAX() is part of an inner select, we have started getting
ORA-06502: PL/SQL: numeric or value error: character string buffer too small
errors.
SELECT MAX(X) INTO var FROM ... works in 9i and 10g
SELECT X INTO var FROM (SELECT MAX(X) X FROM ... worked in 9i, does not work in 10g!
-- We never had problems with the code until upgrading to 10g release 2.
-- the Solution is to cast the final value with TO_CHAR(). The cast MUST be done at the outer most point of the select:
SELECT TO_CHAR(X) INTO var FROM (SELECT MAX(X) X FROM ... works
SELECT X INTO var FROM (SELECT TO_CHAR(MAX(X)) X FROM ... causes an error!
The following script demonstrates the issue, and includes the solution:
* October 3, 2006
* Possible SQL bug introduced with Oracle 10G
* Natalie Gray DBA/Developer, Environment Canada
* Description:
* Have discovered a problem with using the MAX() function
* on columns of type char(1)
* only an issue when used in an inner select
* solution (see test 4)
CREATE TABLE SQL_BUG_TEST
X NUMBER,
Y NUMBER,
Z CHAR(1)
INSERT INTO SQL_BUG_TEST (X, Y, Z)
VALUES (1,1,'A');
INSERT INTO SQL_BUG_TEST (X, Y, Z)
VALUES (1,1,'B');
INSERT INTO SQL_BUG_TEST (X, Y, Z)
VALUES (1,2,'C');
INSERT INTO SQL_BUG_TEST (X, Y, Z)
VALUES (1,2,'D');
DECLARE
TYPE REC IS RECORD (
      x SQL_BUG_TEST.X%TYPE,
      y SQL_BUG_TEST.Y%TYPE,
      z SQL_BUG_TEST.Z%TYPE
v_rec REC;
BEGIN
      -- DISPLAY THE TABLE DATA
      BEGIN
             DBMS_OUTPUT.PUT_LINE('TABLE DATA:');
            DBMS_OUTPUT.PUT_LINE('');
             DBMS_OUTPUT.PUT_LINE('SELECT * FROM SQL_BUG_TEST ORDER BY X,Y,Z;');
             FOR crs IN (SELECT *
                                 FROM SQL_BUG_TEST
                           ORDER BY X,Y,Z) LOOP
                DBMS_OUTPUT.PUT_LINE(':'||crs.X||':'||crs.Y||':'||crs.Z);
            END LOOP;
      EXCEPTION WHEN OTHERS THEN
             DBMS_OUTPUT.PUT_LINE(SQLERRM);
      END;
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      -- returning result from MAX into a variable when the MAX is in the outer most select
      -- does not cause an error
      BEGIN
             DBMS_OUTPUT.PUT_LINE('*****************************************************');
             DBMS_OUTPUT.PUT_LINE('TEST 1');
            DBMS_OUTPUT.PUT_LINE('');
             DBMS_OUTPUT.PUT_LINE('SELECT X, Y, MAX(Z) Z');
            DBMS_OUTPUT.PUT_LINE('FROM SQL_BUG_TEST');
            DBMS_OUTPUT.PUT_LINE('GROUP BY X,Y');
            FOR crs IN (SELECT X, Y, MAX(Z) Z
                                 FROM SQL_BUG_TEST
                           GROUP BY X, Y
                           ORDER BY X,Y,Z) LOOP
                 DBMS_OUTPUT.PUT_LINE(':'||crs.X||':'||crs.Y||':'||crs.Z);
            END LOOP;
      EXCEPTION WHEN OTHERS THEN
           DBMS_OUTPUT.PUT_LINE(SQLERRM);
      END;
      -- TEST 2
      -- returning MAX() from an inner select to an outer select and then into a variable
      -- causes an error
      BEGIN
             DBMS_OUTPUT.PUT_LINE('*****************************************************');
             DBMS_OUTPUT.PUT_LINE('TEST 2');
            DBMS_OUTPUT.PUT_LINE('THIS DID NOT CAUSE AN ERROR WITH ORACLE 9i');
            DBMS_OUTPUT.PUT_LINE('');
             DBMS_OUTPUT.PUT_LINE('SELECT * INTO v_rec');
            DBMS_OUTPUT.PUT_LINE('FROM');
            DBMS_OUTPUT.PUT_LINE('(SELECT X, Y, MAX(Z) Z');
            DBMS_OUTPUT.PUT_LINE('FROM SQL_BUG_TEST');
            DBMS_OUTPUT.PUT_LINE('GROUP BY X,Y)');
            DBMS_OUTPUT.PUT_LINE('WHERE Y = 1');
            SELECT * INTO v_rec
            FROM
            (SELECT X, Y, MAX(Z) Z
             FROM SQL_BUG_TEST
             GROUP BY X, Y)
            WHERE Y = 1;
            DBMS_OUTPUT.PUT_LINE(':'||v_rec.X||':'||v_rec.Y||':'||v_rec.Z);
      EXCEPTION WHEN OTHERS THEN
           DBMS_OUTPUT.PUT_LINE(SQLERRM);
      END;
      -- TEST 3
      -- casting the result from MAX to char before returning to the outer select
      -- still causes an error
      BEGIN
             DBMS_OUTPUT.PUT_LINE('*****************************************************');
             DBMS_OUTPUT.PUT_LINE('TEST 3');
            DBMS_OUTPUT.PUT_LINE('');
             DBMS_OUTPUT.PUT_LINE('SELECT * INTO v_rec');
            DBMS_OUTPUT.PUT_LINE('FROM');
            DBMS_OUTPUT.PUT_LINE('(SELECT X, Y, to_char(MAX(Z)) Z');
            DBMS_OUTPUT.PUT_LINE('FROM SQL_BUG_TEST');
            DBMS_OUTPUT.PUT_LINE('GROUP BY X,Y)');
            DBMS_OUTPUT.PUT_LINE('WHERE Y = 1');
            SELECT * INTO v_rec
            FROM
            (SELECT X, Y, to_char(MAX(Z)) Z
             FROM SQL_BUG_TEST
             GROUP BY X, Y)
            WHERE Y = 1;
            DBMS_OUTPUT.PUT_LINE(':'||v_rec.X||':'||v_rec.Y||':'||v_rec.Z);
      EXCEPTION WHEN OTHERS THEN
           DBMS_OUTPUT.PUT_LINE(SQLERRM);
      END;
      -- TEST 4 - SOLUTION
      -- the return value of MAX must be cast with to_char at the point where it is assigned to
      -- variable (outer most select)
      BEGIN
             DBMS_OUTPUT.PUT_LINE('*****************************************************');
             DBMS_OUTPUT.PUT_LINE('TEST 4 SOLUTION');
            DBMS_OUTPUT.PUT_LINE('');
             DBMS_OUTPUT.PUT_LINE('SELECT X, Y, TO_CHAR(Z) Z INTO v_rec');
            DBMS_OUTPUT.PUT_LINE('FROM');
            DBMS_OUTPUT.PUT_LINE('(SELECT X, Y, MAX(Z) Z');
            DBMS_OUTPUT.PUT_LINE('FROM SQL_BUG_TEST');
            DBMS_OUTPUT.PUT_LINE('GROUP BY X,Y)');
            DBMS_OUTPUT.PUT_LINE('WHERE Y = 1');
            SELECT X, Y, TO_CHAR(Z) Z INTO v_rec
            FROM
            (SELECT X, Y, MAX(Z) Z
             FROM SQL_BUG_TEST
             GROUP BY X, Y)
            WHERE Y = 1;
            DBMS_OUTPUT.PUT_LINE(':'||v_rec.X||':'||v_rec.Y||':'||v_rec.Z);
      EXCEPTION WHEN OTHERS THEN
           DBMS_OUTPUT.PUT_LINE(SQLERRM);
      END;
END;

I certainly looks like a bug, but you should raise an iTAR on Metalink since Oracle does not monitor this forum.
I was able to replicate your results on my 10.2.0.1 database.
There is an easier workaround than yours. Try
ALTER TABLE sql_bug_test MODIFY (z VARCHAR2(1));That seems to eliminate the problem on my instance.
John

Can I use Count, Max function in PLSQL BLOCK.

Can U help me to use count, max function in PLSQL BLOCK.
Because it is giving me error "It is a SQL function"

SELECT COUNT(*)
INTO l_variable
FROM dual;
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Hi Experts,
i'm using Data services (etl), and working on budget table(ms sql table),
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Regards,
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SQL> select max('Y') from tt1
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          0 redo size
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        499 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
          0 sorts (memory)
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          0 redo size
        381 bytes sent via SQL*Net to client
        499 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
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2 where rownum = 1
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          0 recursive calls
          0 db block gets
          4 consistent gets
          5 physical reads
          0 redo size
        372 bytes sent via SQL*Net to client
        499 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
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          0 sorts (disk)
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===========
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David

Any solution for the above problem?
O.

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VERY URGENT...
Am new to oracle...
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total 2 8700.00 544970.30 8180 8185 0 0
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Very often, about a primary key, see for example our italian accounting application (our VAT invoices:fatture IVA) ), where the holes might be a problem.
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