SQL & PL/SQL :: All Selected N Consecutive Rows Retrieved In Single Query
Nov 11, 2011
I have table T with 50,000 rows
create table T
(student_id number,
class_id number,
quiz_id number,
marks number)
some sample rows like
INSERT INTO T VALUES (1,1, 1, 50);
INSERT INTO T VALUES (2,2, 2, 40);
INSERT INTO T VALUES (3,1, 3, 34);
INSERT INTO T VALUES (1,1, 4, 10);
INSERT INTO T VALUES (1,1, 5, 30);
INSERT INTO T VALUES (1,1, 6, 29);
INSERT INTO T VALUES (3,2, 7, 34);
INSERT INTO T VALUES (3,2, 8, 33);
INSERT INTO T VALUES (3,2, 9, 56);
INSERT INTO T VALUES (1,1, 7, 90);
INSERT INTO T VALUES (2,2, 8, 0,);
INSERT INTO T VALUES (1,1, 8, 80);
INSERT INTO T VALUES (2,2, 8, 65);
INSERT INTO T VALUES (1,1, 9, 34);
INSERT INTO T VALUES (2,2, 9, 11);
each student belongs to one class_id. each student participates in many quizes. each quiz has its unique id. each student can appear once in a quiz_id
I am doing the below analysis and query:
1. with below query I am finding which student_id had most marks in any 3 successive quizes (see the 3-1 part below) in the query..
SELECT QUIZ_ID,
STUDENT_ID,
SUM (MARKS)
[Code]....
SQL> /
QUIZ_ID STUDENT_ID CONSECMARKS
---------- ---------- -----------
7 1 170
6 1 166
8 1 129
5 1 106
8 3 89
8 2 76
3 3 68
7 3 67
8 2 65
1 1 60
9 3 56
9 1 49
2 2 40
4 1 40
9 2 11
15 rows selected.
With above query, I can play around and find for any 'n' number of consecutive quizes, like marks in 2 consecutives quizes, 3, 4 and so on but for each 'n' value I've to run a seperate query mentioning (2-1) or (3-1) or (4-1) and so on..
since my table is big and there are about 400 quizes so what I want to find out is for each 'n' consecutive quiz (from 1 to 400) which student had most marks for each consecutie 'n' quiz. Like in 1 (consecutive) quiz which student had the highest marks and then 2 conseuctive quiz who had most marks and then in 3 consecutive quiz who had most marks and so on till 400 consecutive quiz who had most marks... rather than running query for each 'n' value seperately i want a single query that can give me a summary of most marks in each n consecutive quizes...
my sample output is:
Nth consecutive quiz student_id sum(marks)
1 1 90
2 1 170
3 1 246
4
.
.
.
100
.
.
200
.
.
300
.
400 ? ?
Is this possible to get the above output from one single query? If there are two or more students with equal most marks for any 'n' conseutive quizes then both should come in the summary.
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Jun 26, 2013
I want to raise a alert after the records retrieved from a query. i.e, if the query fetches 0 records then the alert show be displayed. Is is possible? If yes tell me the trigger to be used to raise such kind of alert.
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Aug 5, 2010
I has a table of structure of varchar2 datatype.
NO
----------
1-2
3-4
5-6
desired output is:
SQL>1
2
3
4
5
6
The table has single column & the values may differ,that is, they may have 1-2-3-...-n in a single row, but the desired output is to be in the rows as shown above.
I tried concepts of SQL up to my knowledge, but I failed. The query to be done only in SQL.complete this query.
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Jun 10, 2011
I'm using Oracle 10g.
Question: How can I write query to return just ID only if all the codes for that ID end in 6.
If I use
SQLselect id from table_a where code like '%6'
then I also get ID=1, which I don't want.
TABLE_A
ID code
=======
1 100
1 106
2 206
3 306
3 336
4 400
Desired Result
ID
==
2
3
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Aug 23, 2012
I have a table T with columns
Col1 Col2
1 A
2 B
3 C
4 D
[code]..
I want to do group ranking in desired col3 in such a way that it checks for different values across consecutive rows under col2 and assigns a number to each group. Just when two consecutive rows in col2 have same value then the group ends and the next group starts.
So my desired output is:
Col1 Col2 Col3
1 A 1
2 B 1
3 C 1
4 D 1
5 D 2
6 A 2
[code]...
Here you can see that the first four rows under col2 are unique i.e A,B,C,D so col3 assigns this as group number 1. It ends at row 4 becuase row 5 also has value D under column 2. So in other words, each group must have all unique values and there should not be any repetition. For example, see group 3 (under col3) in above desired output; it starts from row 9 and ends at row 11 because row 12 also has value 'C' and the value 'C' has already occurred in group 3 in row 9.
I want to achieve this SQL. I tried using Dense rank but couldn't go through. I want the shortest possible query to acheive this.
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Jun 23, 2013
I have homework due, and I'm so stuck: This worked when I first ran it, and now all 6 queries return the same error No Rows selected. I did have to add a column to a table, and insert data for that column before this worked.
> --------------------------
> --REPORT 1
> ---------------------------
SELECT sur.channo,
supp.supplierid,
sur.packtype,
program_name,
ratingcode,
[code]....
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Jul 15, 2011
I have a problem with a query. I have a table employee with data as
emp_id date day working_ind
1 01-Jan-2011 Mon Y
1 02-Jan-2011 Tue Y
1 03-Jan-2011 Wed Y
1 04-Jan-2011 Thu Y
1 05-Jan-2011 Fri Y
1 06-Jan-2011 Sat N
1 07-Jan-2011 Sun N
1 09-Jan-2011 Tue Y
Sundays/ Monday/ any public holiday the working_ind will be N. If the emp is absent on one day then there will be no record entered in the table (e.g. 8th jan there is no record). Each table has only one year data.
I need to retrieve for all employees when they worked for 30 consecutive days without being absent which does not include sat/ Sunday / holidays.
Its like:
-- i need to order by emp_id and date
-- get oly the data with working_ind as Y
-- make sure that i get 30 consecutive days (from what ever i get above) where no days data is missing
I tried using lag and inner join but it does not seem to be working.
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Aug 3, 2011
Can we select table's rows of 5 to 15, like
select * from emp
where rowid <=5;
It is through an error when i used the below method.
select * from emp
where rowid >=5 and rowid <=15;
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Jun 18, 2013
I am trying to run the following queries in my database.
Q-1)select * from item where trunc(approval_date)='21-MAY-13'
When Q-1 is executed it returned row that has approval_date of 21-MAY-13 from database.
Q-2)select * from item where approval_date=to_date('21-MAY-13')
When Q-2 is executed it says no rows selected.
difference or if any links related to this.
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Feb 25, 2012
I'm attempting to write a plsql for finding missing archived logs for streams.
requirement is to run a select statement and print
1. 'NOT FOUND' if name column is null
2. '<name of the files>' if rows are returned
3. 'NOT FOUND' if no rows are selected. (here is were i'm having trouble)
code i developed so for:
for cr in (select decode(name, NULL, 'NOT FOUND', name) from v$archived_log where deleted='YES'
and status!='A')
loop
if (cr.name = 'NOT FOUND')
[code]...
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Dec 10, 2011
I have a need to query a real time production database to return a set of results that spans a three day period. When the three days are consecutive it's easy but sometimes there is a 1 or two day gap between the days. For example I'm querying results from a group of people that work between Tuesday and Saturday. On a Wednesday I need t produce a set of results that spans Tuesday of the current week, and Saturday and Friday of the previous week; on Thursday I need to produce a set of results that that spans Wednesday and Tuesday of the current week and Saturday of the previous week.I'm using SQL Developer to execute the code.
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Mar 23, 2011
Can I apply Referential Integrity to only selected rows of a particular column? This is the reference key to the primary key to another table. But, the issue is, this reference column is not having mandatory data for all the rows. So, whenever this is null, I dont want it to be referred by parent table.
no, and it makes no sense to do so either
We have an appointment form in our HIS, where patients take telephonic appointment. That time they may not know their user id given by hospital. So, it remains blank & name is entered manually. But if the user-id is entered, it must fetch patient name from the master.
The candidate key must be unique within its domain.The candidate key can not hold NULL values.
ALTER TABLE HLTHCHKAPPOINTHD ADD (
CONSTRAINT SYS_C007145
FOREIGN KEY (N_PATIENTMR_ID)
REFERENCES MRREGISTRTNHD (N_PATIENTMR_ID));
MRREGISTRTNHD is a patient master & has a primary key named N_PATIENTMR_ID.
HLTHCHKAPPOINTHD is a appointment table & has a foreign key named N_PATIENTMR_ID which references N_PATIENTMR_ID of MRREGISTRTNHD.
Also, N_PATIENTMR_ID of HLTHCHKAPPOINTHD is not a unique key & it can contain null values also. I want to define constraint or any other method such that only the not null values are referenced to the master i.e. it should validate in the master. And null values should skip this reference.
Now, what happens is due to this constraint, when I'm trying to edit & update the rows having null value in N_PATIENTMR_ID, it gives the following error.
ORA-02291: Integrity constraint (SYS_C007145) violated - parent key not found
So, can I give some condition in the above constraint saying, apply this constraint to table HLTHCHKAPPOINTHD only having the not-null values in N_PATIENTMR_ID coulmn?
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Jun 17, 2010
Am using the SQL*PLus tool via a command line to execute some simple "select" scripts. Scripts work fine in what they produce - except for something that is missing occasionally.
For SOME scripts, I'm getting no "xx Rows Selected" type messages at the bottom and I can't figure out why. When no data si returned in some (different) scripts I do get a "no rows selected" message. Am looking for this message in all outputs as an "end of report"-style marker.
No complicated SQL logic and I have the following standard settings applied into each script.
set linesize 500
set pagesize 50000
set tab off
set wrap off
set colsep '|'
I have 20 years of coding experience so it's not a basic error....albeit I'm far more familiar with MS SQL Server product set as well as the PL/SQL Developer client front ends for Oracle.
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Jul 6, 2012
I have a I/R report with a checkbox is column 1 of each row using:
HTMLDB_ITEM.CHECKBOX
(1,R.RESEARCH_ID,
decode(:Pxx_SELECT_ALL_ROWS,'Y','CHECKED',
decode(instr(nvl(:Pxx_SELECTED_IDS,0),R.RESEARCH_ID),0,NULL,'CHECKED'))
)
AS select_flag
I want to use Javscript or a Dynamic Action to "count" how many selected rows there are, when a UPDATE button is pressed. Right now, the UPDATE button "submits" the page, then a page item computation runs the following code to get a count:
DECLARE
v_cnt number(9);
BEGIN
v_cnt := 0;
FOR i in 1..htmldb_application.g_f01.count
LOOP
v_cnt := v_cnt + 1;
END LOOP;
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This works... but I dont want to submit (and rerun the report) just to get this count.
I have copied this loop into a Dynamic Action using the Click action of the UPDATE button, but it doesnt seem to recognize htmldb_application.g_f01.count .. so my value returns as 0.
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Apr 21, 2013
There is a simple table prod having a column crlf.i did the following
Quote:
SQL> update prod set crlf=null;
716 rows updated.
SQL> commit;
Commit complete.
SQL> select * from prod where crlf=null;
no rows selected
why NO row selected against last query?
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Apr 27, 2013
create table call(id number(10) primary key,mobile_no number(10), other_no number(10), call_type varchar2(10),call_date_time date, duration number(10));
insert into call values(1,9818764535,9899875643,'IN','24-APR-13 02:10:43',10);
insert into call values(1,9818764535,9898324234,'IN','24-APR-13 05:06:78',10);
insert into call values(1,9818764535,9215468734,'IN','24-APR-13 15:06:78',10);
insert into call values(1,9818764535,9899875643,'OUT','25-APR-13 01:06:78',10);
insert into call values(1,9899875643,9899875643,,'OUT','25-APR-13 22:06:78',10);
Query : need to find first and last call of '9818764535' mobile number and of call_date between '24-apr-13' and '25-apr-13';
Result :
date ,mobile_no , other_no, call_type, duration
24/apr/13 , 9818764535,9899875643,'IN',10
24/apr/13 ,9818764535,9215468734,'IN',10
[Code]....
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Nov 30, 2010
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last record ;
l := :system.cursor_record
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Jul 15, 2011
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for example;
Input data:
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IBM Mat_dt 10/10/20101/1/2001 1/1/2002
IBM Bid Market 10/10/201075 85
IBM asset_nm 1/1/2011International IBM
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I have attached sample output file with it.
how to get this via sql?
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INSERT INTO RELATIONSHIP VALUES (2,3)
INSERT INTO RELATIONSHIP VALUES (2,4)
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Feb 28, 2012
CREATE TABLE T1 ( id NUMBER,
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/
[Code]...
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Feb 21, 2012
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DECLARE
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Mar 22, 2013
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Row1 a1 a,b,c 01 ON
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query output_
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1 8217
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4 5543
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Jun 25, 2012
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Apr 9, 2013
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Jul 24, 2009
Updating multiple ROWS with different values using single statement. Requirement is to update one column in a table with the values in the other table.
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Each MEMBER has CORPORATE PROFILE which in turn is associated with CORPORATION. Now I need to update MEMBER table with CORPORATION identifier for members who belong to corporations with identifiers say 'ABC' and 'DEF'.
MEMBER table contains column 'CORPIDENTIFIER '. CORPORATEPROFILE table contains MEMBERID and CORPORATIONID,this will associate a member with the corporation. CORPORATION table contains ID and CORPIDENTIFIER.
Using the below query I am getting error,ORA-01427:single-row subquery returns more than one row
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Jul 27, 2012
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E.g. of Feed File -
Comp_id, Comp_name, column_name, column_value
1,HSBC,branch_name,HSBC-DELHI
1,HSBC,branch_add,24-Lajpat Nagar
1,HSBC,branch_phone,2322322
2,HSBC,branch_name,HSBC-MUMBAI
2,HSBC,branch_add,24Andheri
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2,HSBC,branch_postalcode,400023
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I need to insert the above data to a table by selecting data from above scenario.
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Feb 16, 2011
The requirement I have is :
I have two tables eim_asset and eim_asset1.I want to update the table eim_asset1 using the following update SQL (Or Logic)
update eim_asset1
set emp_emp_login = (select login from s_user where row_id in
(select row_id from s_emp_per where row_id in
(select pr_emp_id from s_postn where row_id in
(select position_id from s_accnt_postn where ou_ext_id in
(select row_id from s_org_ext where row_id in
(select owner_accnt_id from s_asset where owner_accnt_id is not null)))))
It gives me the ORA error : ORA-01427:single-row subquery returns more than one row.know why I am getting it, because of the one-to-many relationship between owner accounts and their assets.
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