Query to finding duration of a value

Hi,
I have a table like below
Create table Datachange(device id , Status Bit , Changed_at datetime);
insert into datachange values (100, 1, '2015-03-21 19:30:16.440'), (100, 0, '2015-03-22 20:31:06.440'), (100, 1, '2015-03-25 20:31:06.440');
I am in need of a sql query to get the duration of status 1 and status 0 between given two date periods for the device For eg. I may give the input from and to period may be between 21 to 25th march 2015 (or) 23rd to 24th march 2015 ..

>> I have a table like below <<
This is not a table. It has no key, no way to ever have a key and the data types are wrong. We do not use assembly language bit flags in SQL. What you have done is copy a paper log sheet into a non-table! If you had a read a book on data modeling,
you would know that a status is a “state of being” so it has to have a temporal dimension, a duration, and not a single point in time. I am also going to guess that you do not need nanoseconds, and that whole dates will work.
CREATE TABLE Device_History
(device_name CHAR(5) NOT NULL,
device_status CHAR(3) NOT NULL
CHECK (device_status IN ('IN', 'OUT')),
start_timestamp DATE NOT NULL,
end_timestamp DATE,
CHECK (start_timestamp <= end_timestamp),
PRIMARY KEY (device_name, start_timestamp));
We can put more constraints to control the gaps and other things but I do not think you are ready for them yet.
INSERT INTO Device_History
VALUES
('D-100', 'IN', '2015-03-21', '2015-03-21'),
('D-100', 'OUT', '2015-03-22', '2015-03-24'),
('D-100', 'IN', '2015-03-25', NULL);
>> I am in need of a SQL query to get the duration of status 'IN' and status 'OUT' between given two date periods for the device <<
And now with a valid design, your problem is trivial! I estimate that 85-95% of the work in SQL should be done in the DDL. Please read any book on RDBMS and then one on basic data modeling.
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL

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Need helping in writing query for finding percentage of duration

Can any one please help in writing query for this.
The table is like this :-
ID     Region     Month     Duration
I1 R1     Jan     80
I2     R2     Jan     70
I3     R1     Jan     70
I4     R3     Jan     40
I5     R1     Feb     80
I6     R2     Feb     30
I7     R3     Mar     100
I want to write a query to find
% of duration for each and every region against each and every month.
Please help in solving this query. I am in urgent need of this.
Thanks in advance.

I also have to do in MS Access 2003You also have to ask into an other forum since here it's an Oracle forum, to try to find Oracle solution.
Nicolas.

Write the sql query to find largest value in row wise without using   great

write the sql query to find largest value in row wise without using
greatest fuction?

Another not so good way, considering you want greatest of 4 fields from a single record:
SQL> ed
Wrote file afiedt.buf
1 with t as (Select 100 col1,200 col2,300 col3,400 col4 from dual
2 union select 500,600,700,800 from dual
3 union select 900,1000,1100,1200 from dual
4 union select 1300,1400,1500,1600 from dual
5 union select 1700,1800,1900,2000 from dual
6 union select 2100,2200,2300,2400 from dual
7 union select 2800,2700,2600,2500 from dual
8 union select 2900,3000,3100,3200 from dual)
9 SELECT (CASE WHEN col1 > col2 THEN col1 ELSE col2 END) Max_value
10 FROM
11 (SELECT (CASE WHEN col1_col2 > col2_col3 THEN col1_col2 ELSE col2_col3 END) col1,
12         (CASE WHEN col2_col3 > col3_col4 THEN col2_col3 ELSE col3_col4 END) col2,
13         (CASE WHEN col3_col4 > col4_col1 THEN col3_col4 ELSE col4_col1 END) col3
14 FROM
15 (SELECT (CASE WHEN col1 > col2 THEN col1 ELSE col2 END) col1_col2,
16         (CASE WHEN col2 > col3 THEN col2 ELSE col3 END) col2_col3,
17         (CASE WHEN col3 > col4 THEN col3 ELSE col4 END) col3_col4,
18         (CASE WHEN col4 > col1 THEN col4 ELSE col1 END) col4_col1
19* FROM t))
SQL> /
MAX_VALUE
       400
       800
      1200
      1600
      2000
      2400
      2800
      3200
8 rows selected.
SQL> Edited by: AP on Sep 21, 2010 6:29 AM

How to find out the ASCII Values for Spanish character

Hi,
I had an requirement to store Spanish character and also need to fileter the records based on the Spanish character.
Kindly guide me for below.
To filter the Records which contains spanish characters?
To get the ASCII Values for the particular column?
E.g. we can find out the ASCII value of 'a' by using the syntax select ASCII('a') from dual.
But I want to find the ASCII Values for the particular column value. Ie. name.
E.g., Client name is "Suresh", I want to the ASCII Values for entire name of "Suresh".
Kindly do the needful help / Guidance on this.
Thanks,
Orahar

To expand on what I said in my first post, you want to do something along these lines:
with t (thename) as
select 'Suresh' from dual
select thename
     , substr(TheName, level, 1)
     , ascii(substr(thename, level))
from t
connect by level <= length(thename);The output of the above query is:
THENAM S ASCII(SUBSTR(THENAME,LEVEL))
Suresh S                           83
Suresh u                          117
Suresh r                          114
Suresh e                          101
Suresh s                          115
Suresh h                          104
6 rows selected.Note that the WITH statement is only there to simulate a table for this example. With a table, all you do is get rid of the with and substitute the name "t" for the name of your table (also the name of the column to whatever name the column has in your table).
Lastly, I suggest you post your question along with, an example table and the output you'd like to get in the PL/SQL forum. There are people there that will give you all kinds of great ways of solving that problem.
HTH,
John.

Query to find out two counts on each column

Hi
can you help for the below query.
I wanted to find out two count values on each column, ie above or equal 5 count and below 5 count.
Table:
Q1 Q2 Q3 (Q1, Q2, Q3 are columns in a table.)
1 3 5
6 7 4
8 5 1
2 8 5
Query should display, like below.
Expected Result:
colname >=5 count <5 count
Q1 2 2
Q1 3 1
Q3 2 2
Thanks in advance.

The query itself can be simplified as follows:
SQL> with t as (
2       select level lvl from dual
3       connect by level < 4)
4 select colname
5       , sum(case when val >= 5 then 1 else 0 end) "count >= 5"
6       , sum(case when val < 5 then 1 else 0 end) "count < 5"
7 from (
8       select decode (lvl, 1, 'Q1', 2, 'Q2', 'Q3') colname
9               , decode (lvl, 1, q1, 2, q2, q3) val
10               , lvl
11       from (select q1, q2, q3
12                       from q),
13                       t)
14 group by colname, lvl
15 order by lvl;Lines 8-10 is what pivots the cartesian join (CJ) of q & t. It helps to explain it by breaking down each part.
The CJ produces (I added the lvl into the output below for explanation purposes):
SQL> with t as (
2       select level lvl from dual
3       connect by level < 4)
4 select q1, q2, q3, lvl
5 from q,
6 t;
        Q1         Q2         Q3        LVL
         1          3          5          1 <-- line a1
         6          7          4          1 <-- line a2
         8          5          1          1
         2          8          5          1
         1          3          5          2 <-- line a5
         6          7          4          2
         8          5          1          2
         2          8          5          2
         1          3          5          3
         6          7          4          3
         8          5          1          3
         2          8          5          3
12 rows selected.and the CJ from above now allows us to pivot the results using the LVL column as the "decoding" key.
SQL> with t as (
2       select level lvl from dual
3       connect by level < 4)
4 select decode (lvl, 1, 'Q1', 2, 'Q2', 'Q3') colname
5       , decode (lvl, 1, q1, 2, q2, q3) val
6       , lvl
7 from (select q1, q2, q3
8         from q),
9         t;
COLNAME           VAL        LVL
Q1                  1          1 <-- line b1
Q1                  6          1 <-- line b2
Q1                  8          1
Q1                  2          1
Q2                  3          2 <-- line b5
Q2                  7          2
Q2                  5          2
Q2                  8          2
Q3                  5          3
Q3                  4          3
Q3                  1          3
Q3                  5          3
12 rows selected.Line b1:
The decodes hit line a1 of the CJ and since lvl = 1, we get colname=Q1 and the corresponding Q1 row value (val=1) of line a1 and finally the value of 1 for lvl.
Line b2:
For decode of line a2 of the CJ, lvl = 1 again and we get colname=Q1 and the corresponding Q1 row value (val=6) of line a2 and finally the value of 1 for lvl.
Line b5:
For decode of line a5 of the CJ, lvl = 2 and we get colname=Q2 and the corresponding Q2 row value (val=3) of line a5 and finally the value of 2 for lvl.
The other rows of the pivoted result set above are obtained similarly and from this result we can now perform the aggregation for the final result.
The WITH query is a called subquery factoring. It allows you to reference the subquery multiple places in the query.
HTH

Query to find out which process consuming more cpu?

Hi All,
some one please tell me the query to find out which process is consuming more
cpu resources?
Thanks and Regards
Srikanth

Use V$SESSTAT to determine which sessions are using most CPU, and investigate what SQL these users/sessions are executing:
SQL> select ss.sid, se.command, ss.value CPU, se.username, se.program
from v$sesstat ss, v$session se
where ss.statistic# in
(select statistic#
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Query to find customers who have not purchased anything

I have a query to find customers who have purchased what we call consumables (using item property) over a given period:
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FROM OINV T0 INNER JOIN INV1 T1 ON T0.DocEntry = T1.DocEntry, OITG T2
WHERE T0.DocDate BETWEEN '[%0]' AND '[%1]' AND T1.ItemCode like '2ssy%' AND T2.ItmsGrpNam = 'consumable'
I have another to show customers who have a particular type of equipment:
SELECT T0.manufSN,T0.itemName, T3.Name, T2.Address, T2.Street, T2.Block, T2.City, T2.County, T2.ZipCode
FROM OINS T0 INNER JOIN OCRD T1 ON T0.customer = T1.CardCode INNER JOIN CRD1 T2 ON T1.CardCode = T2.CardCode Inner Join OCPR T3 ON T0.ContactCod = T3.CntctCode
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I have tried using Excel by finding duplicates and taking those in query 1 from those in query 2 but it's very messy.
Has anyone done anything like this or got any good ideas?
Thanks

Hi Ralph,
Well, I enjoy teaching, so let's start at the beginning. SQL is a fairly full-featured language, and it supports recursion and nesting. That's why the books online often describe elements of the SQL statements as "expression" - it may be more than a field or a simple function occurring there. Nesting is the little puppy we used here.
Now, in your first post, you said: "What I would like is to find those customers who have this equipment (query 2) but who have NOT purchased and consumables (query 1) in say the last year."
So, our common point between the two queries is the customer, the CardCode. That's what this part does: F0.CardCode = T0.Customer. In my internal convention, I used F for Filter. So we only want the results in the filter where the CardCode matches the CardCode/Customer from the main query tables. It's the sole contact point between the two queries.
You also said you wanted only the items where they had purchased no consumables, which basically translates into: a count of the records equals 0. Now, since all we're interested in from the second query, the consumables query is how many records we returned, we get rid of all the columns except for one that we apply a COUNT to. After that, it's a simple criteria: the result of the second query has to equal 0. This is how the criteria looks after you take out all the details and put only the important brackets in: (SELECT COUNT...FROM...WHERE...) = 0.
This might be confusing at first, because most of the time we return recordsets from queries, but a standard feature of SQL is to return a value of any data type if the query returns a single row and a single column. This wouldn't work at all if we had more than one column in our nested query (or would require lots of tweaking), and although it returns a number of results in the complete process of the whole SQL statement, it only returns one result for each row.
Regards,
Mark Dielmann
Edited by: Mark Dielmann on Nov 13, 2009 12:30 PM - Forum doesn't support advanced formatting on answered questions.
Edited by: Mark Dielmann on Nov 13, 2009 12:32 PM - Salutations and more formatting.
Edited by: Gordon Du on Nov 13, 2009 10:35 AM - There are maximum characters limitation for correct format

How to find if COLUMN DEFAULT VALUE is stored as metadata?

Hello,
I'm using Oracle 11g enhanced ADD COLUMN Functionality. Adding new columns with DEFAULT values and NOT NULL constraint no longer requires the default value to be stored in all existing records.
Sometimes we change DB columns from NOT NULL with DEFAULT to NULL with DEFAULT. This operation "materialize" column default.
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Oracle RDBMS version : Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production

Thanks for your suggestion, but it is not what i'm looking for :-(
I don't need to find the default value, i need to know how is default value stored. It could be stored in 2 ways.
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WARNING: ADFv: Could not find selected item matching value ...

Using Windows JDev 11.1; I have an entity object with an attribute which has a LOV configured to supply a select-one-choice render. The LOV query requires that a bind variable be supplied. When creating a new record in the entity via the VO, I can use the ViewImpl to create a new row, retrieve the RowSet which corresponds to the attribute LOV query, set the named where clause parameter, and I'm away. When updating however, I'm getting the following error reported:
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In the run-time, the list items appear unpopulated (current value and list items). If I reload the page, it all comes up fine, which could tend to suggest that a PPR event might fix me up, but I would prefer to know how this should be done.
Thanks in advance.
Edited by: robli on Dec 9, 2009 9:01 PM

Hi,
Is your issue resolved. I'm facing similar issue. I have created a viewaAccessors in EO, associated these to ViewObject attributes as List of Values.
I created the table in UI using the ViewObject.
I see those as selectOneChoice but not values (Empty list).
If I create new record in the table by CreateInsert. table now shows the ListOfvalues.
any Idea what am I missing.
Thanks,
Satya
Edited by: stammine on Mar 2, 2010 4:09 PM

SQL query to find out last login for each database

Hi everybody,
I have a view with following columns:
DatabaseSid, lastLogin, firstLogin.
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Database 3 07.09.2012, 12.10.2012
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Steve wrote:
Hi everybody,
I have a view with following columns:
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I want to now the newest last_login date for every database.
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How can I do a query to find out for eacht DB (DB1, DB2 and so on) the Last_Login Date?
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hello,
I have this code in a WBP
begin
go_block('xxx');
execute_query;
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thanks
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user10131488 wrote:
Hello,
Sorry to ask you that, but i tried to retrieve the last query in the system variable, but i can't. first i create an item and create a WMC trigger and i put this code in it:
DECLARE
tempv VARCHAR2(500);
BEGIN
tempv:=:SYSTEM.LAST_QUERY;
:GPV_OBJECTIF.TEXT_ITEM326:=temp;
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CharlyMouse triggers are intentionally ignored in WebForms, they will not fire.
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Tony

Query to find the application user

Hi,
what is the query to find the application user in sql command?
I tried the below query
select app_user from dual;
app_user invalid identifierthanks.

Use bind variable notation:
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1                  xxx                   1
2                  yyy                   1
3                  zzz                   1
4                  fff                    2
5                   ttt                  2
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Try:
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ClassID INT identity(1, 1) PRIMARY KEY
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INSERT INTO @Classes (ClassName)
VALUES ('CSharp')
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,StudentName VARCHAR(10)
,ClassID INT
INSERT INTO @Students (
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,ClassID
VALUES (
'xxx'
,1
'yyy'
,1
'zzz'
,1
'fff'
,2
'ttt'
,2
SELECT TOP (1)
WITH TIES C.ClassName
FROM @Classes C
INNER JOIN @Students S ON C.ClassID = S.ClassID
GROUP BY C.ClassID
,C.ClassName
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For every expert, there is an equal and opposite expert. - Becker's Law
My blog
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SQL query to find sqlnet.ora parameters

Hi All,
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Thanks
raj

The sqlnet.ora file is the profile configuration file. It resides on the client machines and the database server.
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Regards
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Memory using sessions script,
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COLUMN session_uga_memory_max FORMAT 9,999,999,999 HEADING 'UGA Memory MAX'
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AND statname1.statistic# = sstat1.statistic#
AND statname2.statistic# = sstat2.statistic#
AND statname3.statistic# = sstat3.statistic#
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