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
I used the following query...
SELECT MAX(ID) FROM A WHERE DELETED='N';
It was worked fine until now....
Now i used the same query...
But the result is
MAX(ID)
9
Please help me... What is the reason?
I want the correct result...
Thanks in advance....

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.

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http://technet.microsoft.com/en-us/library/ms145601.aspx
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Ok, I will clear myself with the following example :
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Kindly correct me I am wrong anywhere in the above.
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b) In case 2, we have a non-static function, synchronized on a static object. Here, again if obj1, and obj2 happen to call the function at the same time, obj1 will try to obtain lock for obj1.a; while obj2 will try to obtain lock for obj2.a.obj1/2 don't call methods or try to obtain locks. The two different threads do that. And you mean First.b, not obj1.b and obj2.b, but see also below.
d) In case 4, we have a static function, synchronized on a static object. Here, again if obj1, and obj2 happen to call the function at the same time, obj1 will try to obtain lock for obj1.a; while obj2 will try to obtain lock for obj2.a.Again, obj1/2 don't call methods or try to obtain locks. The two different threads do that. And again, you mean First.b. obj1.b and obj2.b are the same as First.b. Does that make it clearer?
Now, I have a query : what happens if the call is made in a classically static manner, i.e. using the statement "First.func_four;".That's what happens in any case whether you write obj1.func_four(), obj2.func)four(), or First.func_four(). All these are identical when func_four(0 is static.
Now, consider this, suppose we have the same reference obj1, in two threads, and the call "obj1.func_four;" happens to occur at the same time from each of these threads. Thus, we have obj1 rying to obtain lock for obj1.aNo we don't, we have a thread trying to obtain the lock on First.b.
and again obj1 trying to obtain lock for obj1.aYou mean obj2 and First.b, but obj2 doesn't obtain the lock, the thread does.
which are the same locks. So, if obj1.a of the first thread obtains the lock, then it will enter the function no-doubt, but the call from the second thread will also succeed.Of course it won't. Your reasoning here makes zero sense..Once First.b is locked it is locked. End of story.
Thus, effectively, our synchronisation is broken.No it isn't. The second thread will wait on the same First.b object that the first thread has locked.
However in any case you have a much bigger problem here. You're autoboxing your local 'int' variable to a possibly brand-new Integer object every call, so there may be no synchronization at all.
You need:
Object a = new Object();
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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>
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Hi Everyone,
Am aware of the following flavors of MAX function
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3) create calculation using: MAX analytic function
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===========
a) with MAX regular, MAX keep dense, MAX - analytic function
is it necessary to sort it using tools/sort - choose fields to sort by?
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2) how did you know to advise when to use MAX keep dense, and when to use MAX - analytic function?
tx for your ideas and assistance, sandra

Hi,
a) with MAX regular, MAX keep dense, MAX - analytic function is it necessary to sort it using tools/sort - choose fields to sort by? or does the data get sorted due to the ORDER BY clause in MAX used in a calculationIt is only necessary to use a sort if you want to have the rows returned in a specific order. The order by in the max calculation defines the maximum within the group or window. It may affect the order the rows are returned, but if it does this is not guaranteed and you should use a sort on the main query.
b) how to understand the diff. bet. MAX keep dense and MAX - analytic function
1) i understand that analytic functions are applied after detail row processing does MAX keep dense calculation happen during detail row processing?Yes
2) how did you know to advise when to use MAX keep dense, and when to use MAX - analytic function?In general, if you want the result on a single row, so you have one row for each group then you should use the aggregate max. If you want to use the same max on all the rows in the window (defined by the partition) then use the analytic max.
Rod West

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VERY URGENT...
Am new to oracle...
I've written a package that display gif images in form of histogram/bar chart. using html,
I need to use max function to display values proportionately.
please help. i need to complete this assignment by 2/9/00 by 10.00 am at the latest. I've half written a function but I don't know if there's a simpler way fo doing this. html enabled

First of all Thanks to all gentlemen who replied ..many thanks ...
Tried the ROW_NUMBER() option but still it is taking time...have given output for the query and tkprof results as well. Even when it doesn't fetch any record ( this is a valid cased because the input header id doesn't have any workflow request submitted & hence no entry in the wf_items table)..then also see the time it has taken.
Looked at the RANK & DENSE_RANK options which were suggested..but it is still taking time..
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WF_ITEMS WHERE ITEM_TYPE = 'xxxxzzzz' AND ROOT_ACTIVITY = 'START_REQUESTS'
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total 2 8700.00 544970.30 8180 8185 0 0
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