Get min and max for a column from table with 24 million rows.

What is the best way to re-write the following query in a procedure for the table which has around 24 million rows?
SELECT MIN(ft_src_ref_id), MAX(ft_src_ref_id )
INTO gn_Min_ID, gn_Max_ID
from UI_PURGE_FT;
Thanks
Edited by: tcode on Jun 21, 2012 12:31 PM

Which of the following plan is better, can you please breifly explain?
Also I need to gather statics to know recursive calls , db block gets ,consistent gets etc. etc. how can I get that?
Thanks
1.
Execution Plan
Plan hash value: 3702745568
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | 6 | 13991 (2)| 00:02:48 |
| 1 | SORT AGGREGATE | | 1 | 6 | | |
| 2 | INDEX FAST FULL SCAN | UI_PURGE_FT_PK | 23M| 136M| 13991 (2)| 00:02:48 |
2.
Execution Plan
Plan hash value: 1974183109
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 1 | | 2 (0)| 00:00:01 |
| 1 | SORT AGGREGATE | | 1 | 6 | | |
| 2 | INDEX FULL SCAN (MIN/MAX)| UI_PURGE_FT_PK | 23M| 136M| 2 (0)| 00:00:01 |
| 3 | SORT AGGREGATE | | 1 | 6 | | |
| 4 | INDEX FULL SCAN (MIN/MAX)| UI_PURGE_FT_PK | 23M| 136M| 2 (0)| 00:00:01 |
| 5 | FAST DUAL | | 1 | | 2 (0)| 00:00:01 |
---------------------------------------------------------------------------------------------

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Get min and max

Thanks in advance for help
I have a query as below
   SELECT FI.TCOL1 ,FI.TIPO,FI.TCOL2,COUNT(*) NUM,
   SUM(FI.TCOL3) SUM_IPBFA,SUM(FI.TCOL4), MIN(FI.COL5) DA_NUM,MAX(FI.COL6) A_NUM
          FROM DBTABLE FI
          WHERE TDATA between DATABEG and DATAEND
          GROUP BY FI.TCOL1 ,TIPO_A,TCOL2
          ORDER BY 1,3           How get MIN e MAX grouped only for FI.TCOL1?
e.g
SELECT FI.TCOL1, MIN(FI.COL5) DA_NUM,MAX(FI.COL6) A_NUM
          FROM DBTABLE FI
          WHERE TDATA between DATABEG and DATAEND
          GROUP BY FI.TCOL1 ,TIPO_A,TCOL2
          ORDER BY 1,3Thanks

it will be better if you can post some sample data and output to work on and to get a better understanding of your requirements.
you might want to try this but not sure if this will give you the result you needed:
Select f1.tcol1,
       f1.da_num,
       f2.a_num
From (SELECT FI.TCOL1,
               MIN(FI.COL5) DA_NUM
          FROM DBTABLE FI
         WHERE FI.TDATA between DATABEG and DATAEND
        GROUP BY FI.TCOL1) F1,
       (SELECT FI.TCOL1,
               MAX(FI.COL6) A_NUM
          FROM DBTABLE FI
         WHERE FI.TDATA between DATABEG and DATAEND
        GROUP BY FI.TCOL1) F2
Where f1.tcol1 = f2.tcol2
Order by 1,2,3

How to find min and max of a field from sorted internal table

Hi,
I have sorted Internal Table by field f1.
How do I find max and min value of f1.
For min value of f1 I am using,
READ TABLE IT1 INDEX 1.
IT1-F1 = MIN.
Is this correct? And how do I find the max value of f1 from this table.
Thanks,
CD

Yes, that is right, and you can get the max like this.
data: lv_lines type i.
* get min
READ TABLE IT1 INDEX 1.
MIN = IT1-F1.
* get max
lv_lines = lines( it1 ).
read table it1 index lv_lines.
MAX = IT1-F1.
Regards,
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Generate xml using FOR XML PATH from table with hierarchy

I need to create xml from a table like:
EL1 EL2 EL3 Attr01 Attr02 Attr03 Attr04
E10, , ,a,b,c,d
E10,E1010, ,a,b,c,d
E10,E1010,E101010,a,b,c,d
E10,E1010,E101020,a,b,c,d
E10,E1010,E101030,a,b,c,d
E10,E1020, ,a,b,c,d
E10,E1020,E102010,a,b,c,d
E20, , ,a,b,c,d
E20,E2010, ,a,b,c,d
E20,E2010,E201010,a,b,c,d
E20,E2020, ,a,b,c,d
E20,E2020,E202010,a,b,c,d
E20,E2020,E202020,a,b,c,d
The hierarchy is EL1--EL2--EL3, and the 3 columns should be elements of xml;
The other for columns Attr01,Attr02,Attr03,Attr04 should be attributes of xml;
The actual table could have more than 500 rows(there are many values for El1,EL2,and EL3).
The expected xml should like:
<root>
<E10 Attr01="a" Attr02="b" Attr03="c" Attr04="d">
<E1010 Attr01="a" Attr02="b" Attr03="c" Attr04="d">
<E101010 Attr01="a" Attr02="b" Attr03="c" Attr04="d" />
<E101020 Attr01="a" Attr02="b" Attr03="c" Attr04="d" />
<E101030 Attr01="a" Attr02="b" Attr03="c" Attr04="d" />
</E1010>
<E1020 Attr01="a" Attr02="b" Attr03="c" Attr04="d">
<E102010 Attr01="a" Attr02="b" Attr03="c" Attr04="d" />
</E1020>
</E10>
<E20 Attr01="a" Attr02="b" Attr03="c" Attr04="d">
<E2010 Attr01="a" Attr02="b" Attr03="c" Attr04="d">
<E201010 Attr01="a" Attr02="b" Attr03="c" Attr04="d" />
</E2010>
<E2020 Attr01="a" Attr02="b" Attr03="c" Attr04="d">
<E202010 Attr01="a" Attr02="b" Attr03="c" Attr04="d" />
<E202020 Attr01="a" Attr02="b" Attr03="c" Attr04="d" />
</E2020>
</E20>
</root>
I create a sample Src table:
CREATE TABLE Src
EL1 VARCHAR(10),
EL2 VARCHAR(10),
EL3 VARCHAR(10),
Attr01 VARCHAR(10),
Attr02 VARCHAR(10),
Attr03 VARCHAR(10),
Attr04 VARCHAR(10)
GO
INSERT INTO Src
(EL1,EL2,EL3,Attr01,Attr02,Attr03,Attr04
SELECT 'E10','','','a','b','c','d'
UNION SELECT 'E10','E1010','','a','b','c','d'
UNION SELECT 'E10','E1010','E101010','a','b','c','d'
UNION SELECT 'E10','E1010','E101020','a','b','c','d'
UNION SELECT 'E10','E1010','E101030','a','b','c','d'
UNION SELECT 'E10','E1020','','a','b','c','d'
UNION SELECT 'E10','E1020','E102010','a','b','c','d'
UNION SELECT 'E20','','','a','b','c','d'
UNION SELECT 'E20','E2010','','a','b','c','d'
UNION SELECT 'E20','E2010','E201010','a','b','c','d'
UNION SELECT 'E20','E2020','','a','b','c','d'
UNION SELECT 'E20','E2020','E202010','a','b','c','d'
UNION SELECT 'E20','E2020','E202020','a','b','c','d'
GO
I tried to use FOR XML PATH to generate xml for the sample data. When the records increase to a few hundreds, it's not a good idea.
Here is my script:
SELECT
(SELECT Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E101010'
FOR XML PATH('E101010'),TYPE
) AS 'node()'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E101020'
FOR XML PATH('E101020'),TYPE
) AS 'node()'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E101030'
FOR XML PATH('E101030'),TYPE
) AS 'node()'
FROM Src
WHERE EL2 = 'E1010' AND (EL1 <>'' AND EL3 ='')
FOR XML PATH('E1010'),TYPE
) AS 'node()'--1010
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E102010'
FOR XML PATH('E102010'),TYPE
) AS 'node()'
FROM Src
WHERE EL2 = 'E1020' AND (EL1 <>'' AND EL3 ='')
FOR XML PATH('E1020'),TYPE
) AS 'node()'--1020
FROM Src
WHERE EL1 = 'E10' AND (EL2 ='' AND EL3 ='')
FOR XML PATH('E10'),TYPE) 'node()'
,(SELECT Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E201010'
FOR XML PATH('E201010'),TYPE
) AS 'node()'
FROM Src
WHERE EL2 = 'E2010' AND (EL1 <>'' AND EL3 ='')
FOR XML PATH('E2010'),TYPE
) AS 'node()'--2010
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E202010'
FOR XML PATH('E202010'),TYPE
) AS 'node()'
,( SELECT
Attr01 AS '@Attr01'
,Attr02 AS '@Attr02'
,Attr03 AS '@Attr03'
,Attr04 AS '@Attr04'
FROM Src
WHERE EL3 = 'E202020'
FOR XML PATH('E202020'),TYPE
) AS 'node()'
FROM Src
WHERE EL2 = 'E2020' AND (EL1 <>'' AND EL3 ='')
FOR XML PATH('E2020'),TYPE
FROM Src
WHERE EL1 = 'E20' AND (EL2 ='' AND EL3 ='')
FOR XML PATH('E20'),TYPE) AS 'node()'
FOR XML PATH(''),ROOT('root')
If I get a few hundreds of rows, how huge the script should be. Does anyone have better solution for this? Thanks.
Tao

wBob,
Thanks! And sorry for late feedback.
The XSD requires the xml structures like the following
<Schools>
<School01>Some school</School01>
<School02>Some other school</School02>
</Schools>
I have to use the number in the element name.
Right now I just use the nested FOR XML PATH, although I have to write thousand lines code.
Thanks anyway.
Tao
Tao

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Hello,
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DELETE FROM TABLE_A WHERE COLUMN_A NOT IN
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COLUMN_A had index defined on it in both tables. Still it is taking a long time. What is the best way to achieve this? any work around?
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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
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4000,5400
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new.vi ‏6 KB

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hello,
i need to know the min and max for my signal but only on parts that i want to define by a trigger. The question is to know how i could(in my while loop) only analyse a aprt of my signal but not the whole one. i can't use a for loop because i need to see my signal all the time.
thanks

Guillaume Trager,
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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:
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I have a scenario where I have an XML, but not its XSD so my question is of two fold
1. Is it possible to create an XSD from that XML, if possible how?
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Edited by: Harsha.Hegde on Sep 2, 2008 5:49 AM

Harsha.Hegde wrote:
Hi,
I have a scenario where I have an XML, but not its XSD so my question is of two fold
1. Is it possible to create an XSD from that XML, yes
if possible how?by using a text editor, tools, etc.
2. Assume I get the XSD how do I read the min and max occurrence from that XSD?sigh
PS: I am coding in java and pretty new to itthen you should take some time to learn the basics, then work your way into XML after you have a grasp on things conceptually.
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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,
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