A bit tricky Min and Max Query

Dear Masters
I have a table
Student_ID
Semester_Name
Registration_Date
Now i want to retrieve for each student_id semester_name with lowest registration_date (First Semester) and Last Semester.
I do not want to use sub query as it has performance problem
Any Help
Thanks
Shakeel

Solution:
SELECT student_id, MIN(semester_name) KEEP (DENSE_RANK FIRST ORDER BY registration_date) as First_Semester, MIN(semester_name) KEEP (DENSE_RANK LAST ORDER BY registration_date) as Last_Semester
From yourtable
GROUP BY student_id
hth

Similar Messages

Help on min and max query

hi all,
I have a query that returns the following.
SELECT id, start_time, end_time
FROM accounts
WHERE
id = 006267
ORDER BY begin_time
result is
 ID BEGIN_TIME END_TIME
 006267 11-12-2006 15:00:00 11-12-2006 17:30:00
 006267 15-12-2006 17:00:00 15-12-2006 19:30:00
 006267 18-12-2006 08:30:00 18-12-2006 12:50:00
 006267 18-12-2006 13:50:00 18-12-2006 18:20:00
 006267 20-12-2006 10:00:00 20-12-2006 12:30:00
 006267 21-12-2006 16:15:00 21-12-2006 18:45:00
The output needed is
006267 11-12-2006 15:00:00 15-12-2006 19:30:00
006267 18-12-2006 08:30:00 18-12-2006 18:20:00
006267 20-12-2006 10:00:00 21-12-2006 18:45:00
Would really appreciate your help on this!
Thanks in advance.

To get the next value, you can use LEAD() over () 
So, in your case : 
lead(end_time) over (partition by id order by start_time) 
You need to define the removing row criteria. If that's only the odd, try : 
select id, start_time, next_end_time
 from
 (select id,
 start_time,
 lead(end_time) over (partition by id order by start_time) next_end_time,
 row_number() over (partition by id order by start_time) rn
 from accounts
 order by id, start_time)
 where mod(rn,2)=1; 
 
Nicolas.

Query about min and max and middle row of a table

suppose i have table emp and field
v_date date;
which has data in time stamp
time
10:20
10:25
10:30
10:32
10:33
10:35
10:36
10:38
I need only min time and max time and two record between min and max

I need only min time and max time and two record between min and max Like this?
SQL> create table t (id number);
Table created.
SQL>
SQL> insert into t values (1020);
1 row created.
SQL> insert into t values (1025);
1 row created.
SQL> insert into t values (1030);
1 row created.
SQL> insert into t values (1032);
1 row created.
SQL> insert into t values (1033);
1 row created.
SQL> insert into t values (1035);
1 row created.
SQL> insert into t values (1036);
1 row created.
SQL> insert into t values (1038);
1 row created.
SQL>
SQL> commit;
Commit complete.
SQL>
SQL> select * from t;
 ID
 1020
 1025
 1030
 1032
 1033
 1035
 1036
 1038
8 rows selected.
SQL>
SQL>
SQL> select decode(rownum, 1, min_val, 4, max_val, next_val) your_data from (
2 select first_value (id) over (partition by 'a' order by 'a') min_val,
3 last_value (id) over (partition by 'a' order by 'a') max_val,
4 id,
5 lead(id) over (partition by 'a' order by id) next_val
6 from t
7 order by id
8 )
9 where min_val <> next_val and max_val <> next_val
10 and rownum <= 4;
YOUR_DATA
 1020
 1030
 1032
 1038
SQL>

Difference of value of a dimension based on min and max

Database: Oracle 10g
BO-BOXIr3
Let me explain the exact problem again.
As per the below code, I have the data in this format in my table:
Code:
Date              Site ID     KWH
1/2/2009 00:00     IN-1     22
1/2/2009 01:00     IN-1     28
1/3/2009 03:00     IN-2     25
1/3/2009 04:00     IN-2     46
1/4/2009 00:00     IN-3     28
1/4/2009 10:00     IN-3     34
1/5/2009 08:00     IN-4     31
1/5/2009 09:00     IN-4     55
1/5/2009 11:00     IN-4     77
1/6/2009 00:00     IN-5     34
Now want to build a report with following columns:
Site     Count     KWH
IN-1     2     6 (ex.-28-22)
IN-2     2     21
IN-3     2     6
IN-4     3     46 (ex.-77-31)
IN-5     2     34
SITE- distinct site name.
COUNT-count is number of repetitions of site id between min and max date.
KWH -(Delta between the min and max date)
To get the above result I have created 3 report from different queries since not able to get these al in a single report viz Count, Max Value and Min value. Well I have all these 3 reports or table on a single page.
Count-this report will give the count between the dates
Max Value-this report will give me the values of kwh for max dates for each site id
Min Value-this report will give me the values of kwh for min dates for each site id
Now want to create a single report based on these 3 reports which contains the column
Site|Count|KWH
IS IT POSSIBLE?
Or
Is it possible to build such report in a single one with all the required column which I mentioned?
The variables which I created to get the max & min dates,
Mx_dt= =Max([Query 2].[Hourly]) In ([Query 2].[SITE_ID])
Mn_dt= =Min([Query 3 (12)].[Hourly]) In ([Query 3 (12)].[SITE_ID])
For filtering on report used following variables:
if_st_mn=If([mn_dt])=[Hourly] Then "ok" Else "no"
if_st_mx =If([mx_dt])=[Hourly] Then "ok" Else "no"
will filter on "ok" to get the max and min date values.
rest of the variable in the snap are not usable.

Yes, you can do it in one report.
I created a sample report from efashion:
Year | Lines | Sales Revenue
2001 | Accessories | $250
2003 | Accessories | $550
2001 | City Skirts | $1050
2003 | City Skirts | $1150...........
Create 2 variables 1) Count and 2) Difference:
1) Count as formula - =Count([Lines]) In Report
2) Difference as formula - =Sum([Sales revenue]) Where (Max([Year]) In Report = [Year]) - Sum([Sales revenue]) Where (Min([Year]) In Report = [Year])
You can replace the formula with your report variables. Then just drag Site ID, Count and Difference variables to your report.
Thanks
Jai

Performance Issue using min() and max() in one SQL statement

I have a simple query that selects min() and max() from one column in a table in one sql statment.
The table has about 9 Million rows and the selected column has a non unique index. The query takes 10 secs. When i select min() and max() in separate statements, each takes only 10 msecs:
This statement takes 10 secs:
select min(date_key) , max(date_key)
from CAPS_KPIC_BG_Fact_0_A
where date_key != TO_DATE(('1900-1-1' ),( 'YYYY-MM-DD'))
This statement takes 10 msecs:
select min(date_key)
from MYTABLE
where date_key != TO_DATE(('1900-1-1' ),( 'YYYY-MM-DD'))
union all
select max(date_key) from MYTABLE
Because the first statement is part of an autmatic generated SQL of an application, i can't change it and i have to optimize the data model. How can i speed up the first statement?

I've ran similar query on a table that has 10 milliion rows, with an index on the date column
This is what I have found:
SQL> set timing on
1 SELECT MIN(ID_DATE) MIN_DATE, MAX(ID_DATE) MAX_DATE
2      FROM MY_DATE
3*     WHERE ID_DATE != TO_DATE(('1900-1-1' ),( 'YYYY-MM-DD'))
SQL> /
MIN_DATE MAX_DATE
03-APR-76 06-JAN-02
real: 43383
SQL> SELECT MIN(ID_DATE) MIN_DATE FROM MY_DATE
2   WHERE ID_DATE != TO_DATE(('1900-1-1' ),( 'YYYY-MM-DD'))
3 UNION ALL
4 SELECT MAX(ID_DATE) MAX_DATE FROM MY_DATE
5   WHERE ID_DATE != TO_DATE(('1900-1-1' ),( 'YYYY-MM-DD'))
6 /
MIN_DATE
03-APR-76
06-JAN-02
real: 20
SQL> SELECT MIN_DATE, MAX_DATE FROM
2 (SELECT MAX(ID_DATE) MAX_DATE FROM MY_DATE
3 WHERE ID_DATE != TO_DATE(('1900-1-1' ),( 'YYYY-MM-DD')) ) A,
4 (SELECT MIN(ID_DATE) MIN_DATE FROM MY_DATE
5 WHERE ID_DATE != TO_DATE(('1900-1-1' ),( 'YYYY-MM-DD')) ) B
6 /
MIN_DATE MAX_DATE
03-APR-76 06-JAN-02
real: 10
SQL> My conculsion, there is nothing you can do to the tables that will improve that particular statement.
Why can't you modify the application?

Formula for MIN and MAX per range required in BW

Good day
Please assist with the following? I need to create a formula (CKF) in BW Query which will give me the same result as the following formula in Excel.
What I have is one Key Figure and want to calculate a Score on that key figure.
Score =Key figure/(MAX(range of ie. column B1 to B50 which contains data for the same KF)-MIN(range of ie. column B50 which contains data for the same KF).
In excel it's easy, ie" Score =TD completed/(MAX(B28:B130)-MIN(B28:B130)
If more information is required to assist, please let me know?
Always appreciated.
Cornelius

Thank U so much for responding so fast.
I did the MIN and MAX formula, but it is only taking the MIN or MAX from the single cell of the applicable key figure and not from a 'range' of cells. This is a further example of what I want to do:
Cell: B1 = 10
        B2 = 12
        B3 = 15
        B4 = 0
I want to display the MIN as '0' and the MAX as '15' and then do the calculation per row.
We are in 3.2x. I want to stay away from structures as I have not done that before.
Any other assistance will be highly appreciated.
Cornelius

Highlighting Min and Max Values on each line

Hello,
Is it possible to highlight the Min and Max values on each row of a Query. For example I have sales below by product line for the last seven quarters. The user
would like the Max value (150) for Product Line ABC Highlighted as Green and the Min value (1055) color coded as Red. Like wise for each line - DEF 200 as green and 100 as red and GHI - 400 as green and 100 as red.
FYQ Q207 Q307 Q407 Q108 Q208 Q308 Q408
ABC     1500     1200     1400     1050     1100     1100     1100
DEF     1550     1000     1560     1220     1340     1640     2000
GHI     1000     2000     3000     4000     3250     2220     3750
Is this possible using Exceptions? or may be any other means? We are on Bex 7.0
Best Regards,
Sanjiv

Hello Sanjiv,
I think it can be done by JavaScript, but needs more effort
[Use of JavaScript Functions|http://help.sap.com/saphelp_nw04/helpdata/en/d9/4a853bc623c075e10000000a114084/content.htm]
Try the exception available in the BW[BW Stylesheets|http://help.sap.com/saphelp_nw04/helpdata/en/3f/ca453afbf37b54e10000000a11402f/content.htm]
SAPBEXformats - Formatting cell (scaling factors)
SAPBEXexcGood1 - Exception with priority good 1
SAPBEXexcGood2 - Exception with priority good 2
SAPBEXexcGood3 - Exception with priority good 3
SAPBEXexcCritical4 - Exception with priority critical 4
SAPBEXexcCritical5 - Exception with priority critical 5
SAPBEXexcCritical6 - Exception with priority critical 6
SAPBEXexcBad7 - Exception with priority bad 7
SAPBEXexcBad8 - Exception with priority bad 8
SAPBEXexcBad9 - Exception with priority bad 9
See this thread,
Change the colour of a cell text depending on the value Web Reports (NW04s)
Thanks
Chandran
Edited by: Chandran Ganesan on Mar 19, 2008 4:27 PM

MIN and MAX datetimes ti find range

I am using Oracle 11g version
create table re(Name char(20),Datetime char(45),val1 number);
insert into re values('abc','10/29/2012 13:00','1.5')
insert into re values('abc','10/29/2012 13:05','1.5')
insert into re values('abc','10/29/2012 13:10','1.5')
insert into re values('abc','10/29/2012 13:15','1.5')
insert into re values('abc','10/29/2012 13:20','0.00')
insert into re values('abc','10/29/2012 13:25','0.00')
insert into re values('abc','10/29/2012 13:30','0.00')
insert into re values('abc','10/29/2012 13:35','0.00')
insert into re values('abc','10/29/2012 13:40','2.1')
insert into re values('abc','10/29/2012 13:45','2.3')
insert into re values('abc','10/29/2012 13:50','2.1')
insert into re values('abc','10/29/2012 13:55','2.1')
insert into re values('abc','10/29/2012 14:00','2.2')
O/P:
In this way data is stored in database.Needed output is, I want the datetime column data range with min and max values where val1>0 only.
Expected result while we consider the above data is::
Name mintime maxtime
abc 10/19/2012 13:00 10/19/2012 13:15
abc 10/29/2012 13:40 10/29/2012 14:00
For this I tried something like this,
select name, min(to_date(Datetime ,'mm/dd/yyyy hh24:mi')) start, max(to_date(Datetime ,'mm/dd/yyyy hh24:mi')) end from (
select name, Datetime ,to_date(Datetime ,'mm/dd/yyyy hh24:mi') - rank() over (partition by loc_name order by t1 asc) Val_col from re where val1 > 0
) group by lname, Val_col
but I am getting the output like this for above query.
name start end
abc 10/29/2012 13:00 10/29/2012 13:00
abc 10/29/2012 13:05 10/29/2012 13:05
so.on.
Edited by: 913672 on Apr 3, 2013 3:07 AM

913672 wrote:
I am using Oracle 11g version
create table re(Name char(20),Datetime char(45),val1 number);
insert into re values('abc','10/29/2012 13:00','1.5')
insert into re values('abc','10/29/2012 13:05','1.5')
insert into re values('abc','10/29/2012 13:10','1.5')
insert into re values('abc','10/29/2012 13:15','1.5')
insert into re values('abc','10/29/2012 13:20','0.00')
insert into re values('abc','10/29/2012 13:25','0.00')
insert into re values('abc','10/29/2012 13:30','0.00')
insert into re values('abc','10/29/2012 13:35','0.00')
insert into re values('abc','10/29/2012 13:40','2.1')
insert into re values('abc','10/29/2012 13:45','2.3')
insert into re values('abc','10/29/2012 13:50','2.1')
insert into re values('abc','10/29/2012 13:55','2.1')
insert into re values('abc','10/29/2012 14:00','2.2')
O/P:
In this way data is stored in database.Needed output is, I want the datetime column data range with min and max values where val1>0 only.
Expected result while we consider the above data is::
Name mintime maxtime
abc 10/19/2012 13:00 10/19/2012 13:15
abc 10/29/2012 13:40 10/29/2012 14:00
For this I tried something like this,
select name, min(to_date(Datetime ,'mm/dd/yyyy hh24:mi')) start, max(to_date(Datetime ,'mm/dd/yyyy hh24:mi')) end from (
select name, Datetime ,to_date(Datetime ,'mm/dd/yyyy hh24:mi') - rank() over (partition by loc_name order by t1 asc) Val_col from re where val1 > 0
) group by lname, Val_col
but I am getting the output like this for above query.
name start end
abc 10/29/2012 13:00 10/29/2012 13:00
abc 10/29/2012 13:05 10/29/2012 13:05
so.on.Firstly and most importantly do NOT store dates as char columns: that's what the DATE type is for.
Secondly, i'm not sure how you get your output from the input, particularly as your SQL contains 'partition by loc_name' which
doesn't even exist in your example table.
Why has the same name got two rows with those min/max times. Are you partitioning by val1?

Min and Max values from entire table

Hi,
i have requirement in which i need to find the min and max values from the entire table.
See the sample data
create table test
Sal1 int,
Sal2 int,
Sal3 int
insert into test values (100,700,5700)
insert into test values (200,3300,5300)
insert into test values (4400,1200,3500)
insert into test values (5400,5600,3100)
i want the output as 100 and 5700.. how can i achieve this in a single query. Please through some light on this topic..!
Thanking you in advance
Regards,
Balaji Prasad B
Balaji - BI Developer

Below is an example with a subquery for each of the queries Mohammad posted in order to return both min and max in a single result set.
SELECT ( SELECT MAX(Maxx) AS Maxx
FROM test UNPIVOT
( Maxx FOR E IN ( Sal1, Sal2, Sal3 ) ) AS unpvt
) AS Maxx
, ( SELECT MIN(Minn) Minn
FROM test UNPIVOT
( Minn FOR E IN ( Sal1, Sal2, Sal3 ) ) AS unpvt
) AS Minxx;
Dan Guzman, SQL Server MVP, http://www.dbdelta.com

Min and MAx Value in a SELECT Statement

Hi,
I have a scenario where I am Selecting the values BETWEEN MIN and MAX values:
SELECT * FROM ABC WHERE CODE BETWEEN MIN(CODE) AND MAX(CODE)
ITS GETTING Error as:ORA-00934: group function is not allowed here
Any help will be needful for me.

select substr(no,1,3)||to_char(substr(no,4,1)+1) "first missing number"
from
with t as
(select 'ABC1' no from dual
union select 'ABC2' from dual
union select 'ABC3' from dual
union select 'ABC5' from dual
union select 'ABC6' from dual
union select 'ABC8' from dual
select no, lead(no,1,0) over (order by no) next_no from t
where substr(next_no,4,1) - substr(no,4,1) > 1
and rownum = 1;

Find more than one min and max in 2D array contain 0 rows

Hi
I have a 2D array and I would like to find the max and min elements between series of 0s. As you can see in the picture If I remove all 0s from the array and use the max and min function then I will have just one min and one max but I need to find min and max after every 0 rows so you can see from the picture ( just as an example) I will have 3 min and 3 max numbers. Would you please help me with this code. Do you now any algorithm that can find min and max between 0s?
I have also attached my code to remove 0s and then search for max and min numbers but as I mentioned I need min and max for every part
Many thanks
Attachments:
2.jpg ‏82 KB
3.jpg ‏27 KB

Thanks altenbach
I have attached the vi to this post. I would really apperciate if you help me with this example. The min values should be 100, 1500 and 4000 and the max values should be 1200,2600,5400 so as u mentioned the output should be this 2D array
100,1200
1500,2600
4000,5400
Attachments:
new.vi ‏6 KB

After installing Version 5 I get an error message about incompatibility and min and max versions.

I shutdown Zone Alarm, and deleted the contents of the file, which contained the "exe" file, then reinstalled Firefox version 5.0. I still get the XUL Runner error message about incompatibility of Version 5.0 with min and max 5.0.1. What next?

The updater wasn't able to update all the files and some were left as older versions. 
You need to do a clean reinstall.
Download a fresh Firefox copy and save the file to the desktop.
* Firefox 5.0.x: http://www.mozilla.com/en-US/firefox/all.html
* Uninstall your current Firefox version.
* Do not remove personal data when you uninstall the current version.
Remove the Firefox program folder before installing that newly downloaded copy of the Firefox installer.
* It is important to delete the Firefox program folder to remove all the files and make sure that there are no problems with files that were leftover after uninstalling.
Your bookmarks and other profile data are stored elsewhere in the Firefox Profile Folder and won't be affected by a reinstall, but make sure that you do not select to remove personal data if you uninstall Firefox.
* http://kb.mozillazine.org/Profile_folder_-_Firefox
* http://kb.mozillazine.org/Profile_backup

Min and max constraints

In my database design and implementation module I'm at the implementation stage. I've set up all of my tables with PK and FK constraints and I'm wondering if you can enforce min and max column constraints. One of the rules of my DB is for my staff table there has to be a minimum of 10 and a maximum of 50, how would I enforce this rule as a constraint on the staff table or isn't this possible?
We have only been learning database design and SQL fundamentals so I don't think I'd be allowed to use triggers or procedures.
Many thanks
Mike

mharper wrote:
thanks guys these commands were accepted
alter table staff
add constraint chk_staff_max check (staff_id <= 50);
alter table staff
add constraint chk_staff_min check (staff_id >= 10);
Thing is my staff_id's are in the format 'S110001' will these constraints only check for integers 10 - 50? maybe I need to use a count function on the column or something?
thanks again for your help!
MikeCheck constraint can also be used to check a list of values.
example:
ALTER TABLE <table_name>
ADD CONSTRAINT <constraint_name>
CHECK (<column_name> LIKE <condition>);
ALTER TABLE <table_name>
ADD CONSTRAINT <constraint_name>
CHECK (<column_name> NOT LIKE <condition>);
ALTER TABLE <table_name>
ADD CONSTRAINT <constraint_name>
CHECK (<column_name>
IN (<comma delimited list of values>);
ALTER TABLE <table_name>
ADD CONSTRAINT <constraint_name>
CHECK (<column_name>
NOT IN (<comma delimited list of values>);
ALTER TABLE <table_name>
ADD CONSTRAINT <constraint_name>
CHECK (<column_name> BETWEEN <lower_value>
AND <higher_value>);
ALTER TABLE <table_name>
ADD CONSTRAINT <constraint_name>
CHECK (<column_name>
NOT BETWEEN <lower_value> AND <higher_value>);
ALTER TABLE <table_name>
ADD CONSTRAINT <constraint_name>
CHECK (<column_name>) > (<condition>);

To find out the min and max memory been used by each parameter under SGA_MA

Hi,
Can any please tell me how to find out the min and max memory been used by each parameter under SGA_MAX and SGA_TARGET ? below is the db CRMS65T. If any such script is there please provide me
SQL> select name from v$database;
NAME
CRMS65T
SQL> show parameter sga
NAME                                 TYPE        VALUE
lock_sga                             boolean     FALSE
pre_page_sga                         boolean     FALSE
sga_max_size                         big integer 1000M
sga_target                           big integer 1000MThanks in advance

Can any please tell me how to find out the min and max memory been used by each parameter under SGA_MAX and SGA_TARGET ? below is the db CRMS65T. If any such script is there please provide meI guess your question is, each memory components of SGA? if so
SQL> select * from v$sgainfo;
NAME                                  BYTES RES
Fixed SGA Size                      2088504 No
Redo Buffers                       18882560 No
Buffer Cache Size                 616562688 Yes
Shared Pool Size                  301989888 Yes
Large Pool Size                     4194304 Yes
Java Pool Size                      4194304 Yes
Streams Pool Size                         0 Yes
Granule Size                        4194304 No
Maximum SGA Size                  947912704 No
Startup overhead in Shared Pool   125829120 No
Free SGA Memory Available                 0Also check
SQL> select COMPONENT,CURRENT_SIZE,MIN_SIZE,MAX_SIZE,USER_SPECIFIED_SIZE from v$sga_dynamic_components;
shared pool                                                         301989888 301989888          0           209715200
large pool                                                            4194304    4194304          0             4194304
java pool                                                             4194304    4194304          0             4194304
streams pool                                                                0          0          0                   0
DEFAULT buffer cache                                                616562688 616562688          0           603979776
KEEP buffer cache                                                           0          0          0                   0
RECYCLE buffer cache                                                        0          0          0                   0
DEFAULT 2K buffer cache                                                     0          0          0                   0
DEFAULT 4K buffer cache                                                     0          0          0                   0
DEFAULT 8K buffer cache                                                     0          0          0                   0
DEFAULT 16K buffer cache                                                    0          0          0                   0
DEFAULT 32K buffer cache                                                    0          0          0                   0
ASM Buffer Cache                                                            0          0          0           603979776
13 rows selected.
SQL>Edited by: CKPT on Sep 19, 2011 8:55 AM

Global Change or filter based on Min and Max dates

Hi Guys,
Hopefully there is a genius out there that is an expert with filters and or global changes, I am after a solution and can’t work out if it is possible to do in P6.
Based on a filter (using codes to select a group of activities) I want to write a value into two date UDF Fields can I:
Run a global change to give the earliest and latest date in the group and write the result to all tasks in the group? or
Is there a mindate maxdate option in Global change or filter? Or
If these tasks were grouped in the activity view can a global change be written to fill down the dates that the summary level is displaying, which are essentially the min and max dates of the groups.
I could do this pretty easily in excel but I have over a 100 projects and doing the import one at a time is not feasible.
I could create LOE’s but as my variables are constantly changing and due to the volume also not an option.
Summary bars are not an option eithers as I am writing the UDF’s to get all the bars I want on one line,
An option for me might be to do it using Legare but I would prefer to see if I can get it done in P6 first.
Cheers
Rob

Yes, you can do it in one report.
I created a sample report from efashion:
Year | Lines | Sales Revenue
2001 | Accessories | $250
2003 | Accessories | $550
2001 | City Skirts | $1050
2003 | City Skirts | $1150...........
Create 2 variables 1) Count and 2) Difference:
1) Count as formula - =Count([Lines]) In Report
2) Difference as formula - =Sum([Sales revenue]) Where (Max([Year]) In Report = [Year]) - Sum([Sales revenue]) Where (Min([Year]) In Report = [Year])
You can replace the formula with your report variables. Then just drag Site ID, Count and Difference variables to your report.
Thanks
Jai

A bit tricky Min and Max Query

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