Using max function in PL/SQL

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..
Any further suggestions or ideas as to how this could be resolved..
SELECT 'Y', 'Y', ITEM_KEY
FROM
( SELECT ITEM_KEY, ROW_NUMBER() OVER(ORDER BY BEGIN_DATE DESC) RN FROM
WF_ITEMS WHERE ITEM_TYPE = 'xxxxzzzz' AND ROOT_ACTIVITY = 'START_REQUESTS'
AND SUBSTR(ITEM_KEY,1,INSTR(ITEM_KEY,'-') - 1) = :B1
) T WHERE RN <= 1
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 1 0.00 1.57 0 0 0 0
Fetch 1 8700.00 544968.73 8180 8185 0 0
total 2 8700.00 544970.30 8180 8185 0 0
many thanks

Similar Messages

Performance issue with using MAX function in pl/sql

Hello All,
We are having a performance issue with the below logic wherein MAX is being used in order to get the latest instance/record for a given input variable ( p_in_header_id).. the item_key is having the format as :
p_in_header_id - <number generated from a sequence>
This query to fetch even 1 record takes around 1 minutes 30 sec..could someone please help if there is a better way to form this logic & to improve performance in this case.
We want to get the latest record for the item_key ( this we are getting using MAX (begin_date)) for a given p_in_header_id value.
Query 1 :
SELECT item_key FROM wf_items WHERE item_type = 'xxxxzzzz'
AND SUBSTR (item_key, 1, INSTR (item_key, '-') - 1) =p_in_header_id
AND root_activity ='START_REQUESTS'
AND begin_date =
(SELECT MAX (begin_date) FROM wf_items WHERE item_type = 'xxxxzzzz'
AND root_activity ='START_REQUESTS'
AND SUBSTR (item_key, 1, INSTR (item_key, '-') - 1) =p_in_header_id);
Could someone please help us with this performance issue..we are really stuck because of this
regards

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..
Any further suggestions or ideas as to how this could be resolved..
SELECT 'Y', 'Y', ITEM_KEY
FROM
( SELECT ITEM_KEY, ROW_NUMBER() OVER(ORDER BY BEGIN_DATE DESC) RN FROM
WF_ITEMS WHERE ITEM_TYPE = 'xxxxzzzz' AND ROOT_ACTIVITY = 'START_REQUESTS'
AND SUBSTR(ITEM_KEY,1,INSTR(ITEM_KEY,'-') - 1) = :B1
) T WHERE RN <= 1
call count cpu elapsed disk query current rows
Parse 0 0.00 0.00 0 0 0 0
Execute 1 0.00 1.57 0 0 0 0
Fetch 1 8700.00 544968.73 8180 8185 0 0
total 2 8700.00 544970.30 8180 8185 0 0
many thanks

How to use MAX function in SSAS MDX Query

I want to run this Query with MAX Condition on LAST_DATA_UPDATE Column .

Hi Ashishsingh,
According to your description, you want to know how to use MAX function in SQL Server Analysis Services MDX Query, right? In this case, please refer to the link below which describe the syntax and sample of MDX function.
http://technet.microsoft.com/en-us/library/ms145601.aspx
http://www.mdxpert.com/Functions/MDXFunction.aspx?f=64
Hope this helps.
Regards,
Charlie Liao
TechNet Community Support

Oracle:how to use max() function in case expression

how to use max() function in case expression, Please explain with any example

Hope this helps and should be self explanatory
with t as
(select 1 col,100 col2 from dual union
select 2 ,100 from dual union
select 2 ,200 from dual union
select 3,100 from dual union
select 3,200 from dual )
select col, case when max(col2)=100 then 'with 100 range'
when max(col2)=200 then 'with 200 range' end from t group by col

Max value without using max() function

Hi
Is there any way to get the max value from a table without using MAX() function
Thanks

well if you think about it i'm sure you'll find a solution
what does max(field) means, it simply is the value of the field where no other value of the same field that is > than this value exists.
consider the following :
table TAB(
fld NUMBER(5));
translate the logic and you'll have
select a.fld from TAB a where NOT EXISTS(select b.fld from TAB b where b.fld>a.fld) and rownum=1;
of course there are better ways i'm sure, you'll just have to figure'em out.

Using Max Function in View Criteria

Hi
I am having a requirement where by i need to make use of max function in view criteria but not able to see any such option. Can someone please help me over it. Here is the requirement.
In table i will be having multiple rows for an employee and i need to pick latest row based on a column say request_id For e.g.
Emp RequestId
A 1
A 2
A 3
A 4
So if i pass the employee id i should get Row Number 4. In simple SQL language I want something like this
select * from emp where empid=A and requestid=( select max(requestid) from emp where empid=A)
Just wanted to know is there any approach that i can use to do all this as part of View Criteria or any other way.
Any help is appreciated!!!
Thanks
AJ

One way is this -
1)https://blogs.oracle.com/adf/entry/using_groovy_aggregate_functions_in (You might need to create a self-referencing VL for this , try if it works using a ViewAccessor too)
OR
Order by RequestId descending in your SQL for the VO if thats ok , then have the ViewCriteria for the EmpId and programmatically pickup the first row...

Cannot use MAX function in PS Query

I am trying to use Query to select the max ( effdt ) from a table.
First, I use the 'Criteria' page to have
(1) Expression 1 = A.EFFDT - Effective Date, (2) Condition type = equal to, (3) Expression 2 = Subquery
Then the Subquery is:
(1) In the 'Field' page, I choose field E.EFFDT - Effective Date, (2) then click on 'EDIT', (3) then click on 'Max', (4) then click on 'OK' button
I then get this message: 'This field is an aggregate field but is being used in non-having criteria.(139,136). The query may fail if this is not corrected'
And as i try run anyway this query, i get this message:
SQL error. Stmt #: 5653 Error Position: 349 Return: 934 - ORA-00934: group function is not allowed here
A SQL error occurred. Please consult your system log for details.
Error in running query because of SQL Error, Code=934, Message=ORA-00934: group function is not allowed here (50,380)
NOTE: This max sql would work if i run using SqlPlus
How can i get Query to use max( effdt ) ?
Any clue anyone ? THANKS

Yes Using it as MAX is OK.
Problem is once you use it as MAX of a field, it wouln't allow this field for you to use it anymore.
A workaround i found that helped is to use the expression let's say 'MAX( a.JOB )' and use this as field.
This way, the system will allow me to use the JOBCODE field.
Thank you for all your helps as it leads me to the soln.

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;
      -- TEST 1
      -- 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

Using CAST Function in PL-SQL

Hello guys,
I'm writing a stored procedure which tries to convert a string representing a number to a fixed size number(with 2 positions fraction). For example, if the input was "15,456" the result would become 15.45.
I was able to aschieve this ussing the CAST function within a query as follows:
select cast ('15,456' as number(15,2)) from dual; -- (the comma in my case is configured as fraction separator). The previous query executes OK using a query analyzer like SQL Plus.
However, when I try to use the same function within a stored procedure, it will complain about the number's size (15,2) and wont compile.
v_importe_ingresado := CAST('15,456' AS NUMBER(15,2));
Error output: PLS-00103 found '(' but expected one of the following: .)@%
When removing the (15,2) it compiles ok
¿Any clue?
I will appreciate any help.
Thanks in advance,
Bernabé

¿Any clue?¿¿¿Over complication???
SQL> select round(15.456, 2), trunc(15.456, 2) from dual
2 /
ROUND(15.456,2) TRUNC(15.456,2)
15.46 15.45
SQL> Cheers, APC
Blog : http://radiofreetooting.blogspot.com/

How to use MAX() function with date field

Hi Frzz,
I have created a Graphical calculation view in which i have multiple records for each employee with different dates. But my requirement is to take the records which have maximum date.
I have converted the date into Integer and applied the MAX() function. But still am getting multiple records.
Is there is any other way we can achieve this requirement in Graphical Calculation view?? Your suggestion will really help me.
Thank you.
Krishna.

Hmm... what have you tried out so far?
Look, I took the effort and created a little example, just for you
Assume we have a table that contains the logon dates of users.
Every line contains the logon date and some info on the user.
Very much like a not-normalized log file could look like.
Now, the output we want is: one line per user with the most current logon time.
Not too difficult:
1. Have a aggregation node that gives you the distinct user details - one line for every user:
2. Have another aggregation node that gives you the last (MAX) logon date per user:
Finally you do a 1:1 join on the USER_ID and map the result to the output.
Easy as pie
- Lars

Using Max function

I have the following tables along with their attributes(the
stared fields show the primary key:
Agent(AgentPhoneNo*, NameOfAgent)
Constituency(ConstituencyNo*,
ConstituencyName,District,RegionCode)
PollingStation(StationNo*,ConstituencyNo*,AgentPhoneNo,
StationName)
VoteResults(Party*, ResultsCategory*,Votes, AgentPhoneNo*)
Results category has two values (S,L) and the number of
parties is variable
My issue is this, below is my code that returns the total
votes received by each party with each constituency. This
query works fine.
<cfquery name="WinningPartyinConstituency"
datasource="#request.datasource#">
SELECT c.ConstituencyName, s.ConstituencyNo, v.Party,
Sum(v.Votes) AS TotalVotes
From (Constituency c
INNER JOIN PollingStation s ON c.ConstituencyNo =
s.ConstituencyNo)
INNER JOIN VoteResults v ON s.AgentPhoneNo = v.AgentPhoneNo
WHERE v.ResultCategory = 'L' AND s.ConstituencyNo IN (Select
ConstituencyNo From Constituency)
Group By c.ConstituencyName, s.ConstituencyNo, v.Party
Order By c.ConstituencyName
</cfquery>
Now I want to check and return the name and total votes of
the party with the maximum votes within each constituency. And but
I can't seem to figure out how to do that, especially because the
max() function takes only to
values.
I will appreciate any guidance on how to write a query that
returns the the party with the maximum votes in each constituency
and the votes it got. TIA

My approach would be to do 2 or 3 Q of Qs to get the numbers
I need.

SQL query using MAX function

I am trying to only display the records where the 'date_entered' is the most recent date per case number.
SELECT distinct c.case_number, u.email,c.assigneddate_chart,
--m.date_entered,
max(m.date_entered)as last_date_entered,
trunc(sysdate)-trunc(c.assigneddate_chart)days_late,
trunc(sysdate)-trunc(m.date_entered)addl_days_late
from chart c, chart_user_roles u,comments m
where
(c.case_status IN ('Open','Pending')) and
c.case_number=m.case_number
group by c.case_number,
u.email,c.assigneddate_chart,m.date_enteredRight now, this is the output im am getting.
Output:
CASE_NUMBER------EMAIL---------ASSIGNEDDATE_CHART---LAST_DATE_ENTERED---DAYS_LATE--ADDL_DAYS_LATE
[email protected]----06-NOV-09-----------------31--------------------11
[email protected]----10-NOV-09-----------------31---------------------7
[email protected]----06-NOV-09-----------------31--------------------11
[email protected]----06-NOV-09-----------------31--------------------11
[email protected]----06-NOV-09-----------------31--------------------11
[email protected]----03-NOV-09-----------------34--------------------14
I am wanting to achieve this output:
Therefore, based on the data below, the only records that i am wanting to display are:
[email protected]----10-NOV-09-----------------31---------------------7
[email protected]----03-NOV-09-----------------34--------------------14
Thanks
Deanna

Is there a reason that you have a DISTINCT in your query? It always makes me nervous to see that where it's not clearly necessary because it frequently means that a developer is missing a join condition and is using the DISTINCT to mask that fact.
On to the meat of your question, though, is there a potential for ties? If so, how do you want to handle that-- do you want two rows for that case, do you want to break the tie using some other column, do you want to pick an arbitrary row? If you want to pick an arbitrary row
SELECT case_number, email, assignedDate_chart, last_date_entered, days_late, addl_days_late
FROM (
SELECT a.*, row_number() over (partition by case_number order by date_entered) rn
FROM (<<your query>>) a
WHERE rn = 1If you want to do something else, just adjust the analytic function and use RANK or add a tie-breaker to the ORDER BY.
Justin

Need help in using sleep function in pl/sql

Hi,
need help:
I have a condition where i want to validate total_pass=total_fail and
I want to use the sleep function in a pl/sql where i want to wait for 2 minutes ie.checking
whether total_pass=total_fail based upon class_id .
I have the data in the table as:
CLASS_ID TOT_PASS TOT_FAIL
1 10 10
2 5 4
3 6 6
4 7 5
Any help will be needful for me

I'm not quite sure what you are lookg for here, but whatever it is, your code as posted won't do it. You will never break out of the WHILE r_Class.Tot_Pass = r_Class.Tot_Fail loop, since these values will never change because you never get the next record form the cursor.
From your original data, it looks like your cursor will return multiple rows which implies to me that you want to fetch the first row from the cursor, check if tot_pass = tot_fail, if they are equal, sleep for two minutes then get the next row. This does not make sense to me. Once the select in the cursor is executed, the data it returns will not change due to Oracle's read consistency model, so there seems to me no point in the sleep.
The other alternative I can see is that you want to check all the returned rows, and if tot_pass = tot_fail for one of the rows (or possibly for all of the rows), then you want to sleep and try again.
If you can explain in words what it is you are trying to accomplish, someone will be able to point you to a solution.
John

Not able to use a function inside a sql in a form, Why ??

Here SERIAL_NUM is a function, this sql work fine in TOAD and SQLPLUS but inside the form iam getting error saying "function serial_num cannot be used in a sql" Why is it like that ?? Is there anyother way to execute this sql ?
cursor c1 is
SELECT msn.ATTRIBUTE7 Order_No,
SERIAL_NUM(i.SERIAL_NUMBER) Serial_No,
msn.ATTRIBUTE5 Firmware,
msn.ATTRIBUTE15 Site_Pref
FROM atrd.INSTALLER_INFO i,
mtl_serial_numbers msn
where SERIAL_NUM(i.SERIAL_NUMBER)=msn.SERIAL_NUMBER

Here is the process I did. My oim version is 9.1.0.2
1) Created java program in IBM RAD and compiled it.
2) Created jar file using jar -cvfm class-files command.
3) Copied the jar file to javatasks folder.
4) Tried to use this jar in adapter then got "Failed because null" and sometimes "Server could not load class" messages. most of the time i am getting "failed because null" message.
Compiled using javac command also without using this tool and created still no luck....

Using PowerShell Functions in t-SQL scripts

experts,
Can I use a power shell function that gets file size given file path by cross applying it to a table in SQL Server that holds file path of files?
fileID    filepath
1         L:\DemoWebPages\About.cshtml.txt
2         L:\DemoWebPages\default.cshtml.txt.txt
3         L:\DemoWebPages\Layout.cshtml.txt
4         L:\DemoWebPages\Site.css.txt
if the above if the table in SQL Server, can I cross apply a power shell function that gets the file size when file path is passed from the table above?
Help Much Appreciated!
ebro

Make sure that you are running on the machine where you've full permission to access file and
Sample data
create table filelist
fileid int,
path varchar(200))
insert into filelist values(1,'c:\Demystifying tempdb whitepaper.pdf')
insert into filelist values(2,'C:\Appleton Papers - 23 SQL DM - dani 6.28.13.pdf')
Powershell Scripts:-
Add-PSSnapin SqlServerProviderSnapin100 -ErrorAction silentlycontinue
Add-PSSnapin SqlServerCmdletSnapin100 -ErrorAction silentlycontinue
Function filesize
param([String] $path)
try {
if(Test-Path $path)
$size=(Get-Item $path).length/1024
write-host "$path size is $size KB"
catch [System.Exception] {
write-host "File not found"
$params = @{server='hqvd0026\kat';database='master'}
$Srv = invoke-sqlcmd @params -Query "SELECT * from dbo.filelist"
$srv
foreach ($db in $Srv)
filesize -path $db.path

Using max function in PL/SQL

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