problem of query by comparing records from the same table against each other
Hi, i'ms truggling to see where I am going wrong here. I have data from cards of following music: -.with charts_table as (select 1 id,'oasis' product_name,0801 week, 20 week_chart_position, 20 highest_chart_position from dual
union select 2,'oasis',0802,14,14 from dual
union select 3,'oasis',0803,17,14 from dual
union select 4,'oasis',0804,29,14 from dual
union select 5,'kings of leon',0801,55,55 from dual
union select 6,'kings of leon',0802,22,22 from dual
union select 7,'kings of leon',0803,35,22 from dual
union select 8,'kings of leon',0804 , 11 , 11 from dual
union select 9,'bob dylan',0801, 88 , 88 from dual
union select 10,'bob dylan',0802,79 , 79 from dual
union select 11,'bob dylan',0803,54,54 from dual
union select 12,'bob dylan',0804,22,22 from dual
union select 13,'kid rock',0801,19,19 from dual
union select 14,'kid rock',0802,24,19 from dual
union select 15,'kid rock',0803,55,0 from dual
union select 16,'kid rock',0804,44,0 from dual)
italic , I need to identify the rogue data where the highest_position is incorrectly registered lower or 0 as thereposition of the highest week was at an earlier date. (stick with me) for example in this kid of rock data initially charted at position 19. What follows
week (0802) his week_chart_position slipped to 24 and the position the highest card is correctly saved at 19 (ie the week 1). The problem
is available in week 0803 and 0804 when somehow the data was corrupted and the higest_chart_position is trying to read 0 (instead of 19). How can I write a query to identify this error?
is the best I have at the moment:-
select * from charts_table ct1 where
nvl2(highest_chart_position,0,99999)>
(select min(week_chart_position) from charts_table ct2
where ct2.week<ct1.week
and ct1.product_name=ct2.product_name)
but it's not working. can someone help and tell where I'm wrong. Thanks a lot for the research/resolve.
Ahh, I was suggesting using the lag function to ensure that highest chart position is not fall lower than highest prior chart positions. Your concern is he reports a higher chart position that she never had. In this case I use the MIN function as an analytic function rather than as an aggregate function:
with t1 as (
select ct.*
, min(week_chart_position) over( PARTITION by product_name order by week) highest
from charts_table ct
order by product_name, week
)
select * from t1 where highest != highest_chart_position;
Conversely, you place your order of cards, which is the highest rank is 1, thew me. I saw the high word and the expected value in the highest chartposition column to be on the rise, but has seen examples of it decreases. It was an oversight on my part.
Published by: Sentinel on October 9, 2008 08:31
Tags: Database
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[code]
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[code]
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[/ code]
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a_l'_aide_de)
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on)
T1. ROWID = t2.rid
)
When Fachhochschule
then
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/
SY.
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---------------------------------------------------------------------------------------------------------
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---------------------------------------------------------------------------------------------------
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No - you do NOT want to do in a trigger.
You cannot query the same table that the trigger is activated on. -C' is a MUTANT and you will get an exception.
When a row is inserted is recalculated to the PERMATTINELIGIBLE of all the records for that employee for that month.
There would be only two or three records for an employee for a month.
PERMMINS is the number of minutes to use as short leave.
If it is less than 60 is eligible for the bonus to attendance for this employee.
If is not normally the day is not eligible for the premium of attendance for this employee.
but an exception is that if a short leaves of DISP employee allowed a month (IE. SSLINASTRETCH) in a straight line, IE. one day, that day is eligible for the bonus of presence.
That is to say. Why the number of short leaves in a month is taken. If it's one and done minutes use is less than SSLINASTRETCH, then the day is eligible for the bonus of presence.
But when I try to create the trigger I get error, PL/SQL: ORA-00907: missing a right parenthesis.
You can not do in a trigger. Even if correct you this error of syntax, you will get the exception that I mentioned above.
Oracle is a multi-user system. Other users can modify the same table that you use.
So even if you could try to interview "all the records for this employee" some of them may be locked if other users access them. Also, an insert statement could try to insert two rows for an employee and the trigger could not have seen the other lines still.
If you want to work with data SETS (all records for an employee), you must write the PL/SQL code that LOCKS all lines updated to prevent others to interfere.
Then you make your operations but NOT in a trigger. Perform inserts and then use an UPDATE query to set this value.
Then VALIDATE to unlock the lines.
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Copy a few lines in the same table, but with different IDS
Hi all
I had this problem... I have a table with its pk (which is a sequence). With a statement select, I extract a few lines, and then I would record in the same table, but with IDS different (obviously eheheh).
I don't know how to do...
Thks for all help ;)
p.s. I want to change some fields in lines before saving as well... don't know how do it more...
example:
ID NAME TYPE
1 ferrari car
2 cars lamborghini
I'm trying to copy the second and changing its type in "BMW".
I could result:
1 ferrari car
2 cars lamborghini
3 bmw cars
Thank youAssuming that your table is named cars_tb and the cars_seq of the sequence.
insert into cars_tb select cars_seq.nextval, name, type from cars_tb
This would overlap with any existing lines, but with a new id.
If you want to duplicate a specific line and change a value, you could do something like:
insert into cars_tb select cars_seq.nextval, name, 'BMW' from cars_tb where type = 'lamborghini'
or better, use the PK
insert into cars_tb select cars_seq.nextval, name, 'BMW' from cars_tb where id = 2
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