SQL & PL/SQL :: Updating Current Column With Previous Columns?
Dec 22, 2011
I need to update the current column with sum of the previous column values. Following are the creation scripts
DROP TABLE TEST_LOG;
CREATE TABLE TEST_LOG
(
[Code]....
Above query is working fine to retrieve the previous column values.But when we are updating the SUM_PRE_COLS column with those values it's not working fine.
I tried by using the following query
UPDATE TEST_LOG T SET SUM_PRE_COLS =
( SELECT LAG(T2.KEY0, 1, 0) OVER(ORDER BY T2.KEY0) + LAG(T2.KEY1, 1, 0) OVER(ORDER BY T2.KEY0)
FROM TEST_LOG T2 WHERE T2.ROWID= T.ROWID);
Using 11gR2, windows 7 client machine. I need to update the table missing_volume (below), where I need to calculate the estimated_missing column. The calculation of estimated_missing column for current month needs previous month numbers (as commented inside the code below). I want the output like the first table. Notice the records start from January, hence estimated_missing for January can't be calculated, but for the the rest of the months it can be done by simply changing 'yr' and 'mnth' (commented inside the code towards the end).
yr mnth location volume actual_missing expected_missing estimated_missing --------------------------------------------------------------------------------------------------------------------------------- 2013 January loc1 48037 24 57 2013 February loc1 47960 3660 53 24 2013 March loc1 55007 78 57 28 2013 April loc1 54345 72 58 77The code:
UPDATE missing_volume g
[Code]....
The code does calculate correct number for 'estimated_missing' as I run the code for each month, but the problem is while updating the current month it also erases the record for previous month. E.g. as can be seen below, after I updated April the column only has the record for April, previous month record is gone, similarly updating March removed February, etc. I can't understand why it's happening!! Here is the output I get:
yr mnth location volume actual_missing expected_missing estimated_missing --------------------------------------------------------------------------------------------------------------------------------- 2013 January loc1 48037 24 57 2013 February loc1 47960 3660 53 2013 March loc1 55007 78 57 2013 April loc1 54345 72 58 77
why it's happening (I mean where is the flaw in the code) and how to get the desired output (first table).
We have employee salary table which will have salary of an employee on daily basis (only working days). Below is the table structure:
CODEemp_salary ---------- emp_id NUMBER(15) NOT NULL effective_date DATE NOT NULL salary NUMBER(15) NOT NULL
Primary key - emp_id, effective_date..This table is yearly partitioned...I have to find out how long the salary is not changed for an employee from given date, and last salary. I am using below query to do this:
CODEWITH salary_tab AS (SELECT effective_date, salary, (CASE WHEN (LAG (salary) OVER (PARTITION BY emp_id ORDER BY effective_date ASC) = salary
[code]....
For emp_id 1, if we ran this query for 10/31/2011, then it has to compare the 10/31 salary with 10/29 and do the same until the salary mismatches. In this case, salary salary mismatch occurs on 10/20, so the stale salary period is from 10/31 to 10/21 which is 7 days.Below query will give that result:
CODE WITH salary_tab AS (SELECT effective_date, salary, (CASE WHEN (LAG (salary) OVER (PARTITION BY emp_id ORDER BY effective_date ASC) = salary
I am trying to set the min date if there is no gap between dates.compare previous date2 value with current date1,if they are same then my new date will be min(date1).
We have employee salary table which will have salary of an employee on daily basis (only working days). Below is the table structure:
emp_salary ---------- emp_id NUMBER(15) NOT NULL effective_date DATE NOT NULL salary NUMBER(15) NOT NULL Primary key - emp_id, effective_date This table is yearly partitioned
I have to find out how long the salary is not changed for an employee from given date, and last salary. I am using below query to do this:
WITH salary_tab AS (SELECT effective_date, salary, (CASE WHEN (LAG (salary) OVER (PARTITION BY emp_id ORDER BY effective_date ASC) = salary ) THEN 0 ELSE 1 END ) changed_ind FROM emp_salary WHERE emp_id = 12345 [code]....
The cost of this query is 1677 and it is taking around 60 msec to complete. When I run this query for around 2000 employees in a loop it is taking around 3 minutes to complete.
The main bottleneck of this query is in the with clause where I am processing the entire history instead of stopping after first change.
We want to find out difference of data for some tables between current day & previous day. We can use query with minus operation but it will take lot of time since table size is in range from 200 to 500 GB. We have to do this exercise every day.
I have created the following trigger whcich will track all the column changes and insert the row in log table. here i have some doubt while substituting the cursor value.
create or replace trigger historylog_trigger before update on log_dev_test for each row declare PRAGMA AUTONOMOUS_TRANSACTION; in_loamid number(10); in_col_name varchar2(10); in_old_val varchar2(100);
I have a table A, whose table structure is in the below format.
Table A
ID DESC VALUE 123 A 454 123 B 1111 123 C 111 123 D 222 124 A 123 124 B 1 124 C 111 124 D 44
Now i need to insert the data from this table to another table B, the sturcture of which is as below
Table B
ID A B C D 1234541111111222 124123111144
How do i frame a query to fetch data from table A and insert that into table B? I don't want to use max and decode combination. as it would return only single row for an ID. I need all the id's to be displayed.
is there any possibility or hint to avoid updating record if columns do not change? For example, I have UPDATE:
UPDATE MY_TABLE SET COLUMN_A = 'ABC' WHERE COLUMN_B = 12
if the value in COLUMN_A is 'ABC' I do not want to do this update. Of course I can add in WHERE 'AND COLUMN_A<>'ABC' but when I am updating a lot of columns it will be annoying
I've a 6 column report where col5 is set to expand vertically (based upon comments) and works wonderfully. Col6 is a single character column, therefore does not expand so the report looks rather messy.
I would like col6 to expand in accordance to col5. Is it possible?
I am trying to find a way to update all of the rows in a table for a column EXCEPT for the very first row. I am not sure if this can be done while I enter my SET parameter or not. I have also thought about using an EXCEPTION in a stored procedure. For example, say I have the table listed below:
SQL> select * from example1;
CODE1 I_ID CODE2 J_ID NAME1 DATE1 ----- -------------------- ----- -------------------- -------------------------------- --------------- A 100 A 200 John 20111225 A 100 A 300 John 20111225 A 100 A 500 John 20111225 A 100 A 400 John 20111225 A 100 A 250 John 20111225 A 100 A 700 John 20111225 A 100 A 800 John 20111225 A 100 A 900 John 20111225 A 100 A 1000 John 20111225 A 100 A 1150 John 20111225 A 100 A 1275 John 20111225 A 100 A 3000 John 20111225
12 rows selected
I am wanting to update the table so that if there were more than 3 J_id's on the table for the same I_id then it will set all of the code1's and code2's to a C except for the very first one. Such as:
SQL> select * from example2;
CODE1 I_ID CODE2 J_ID NAME1 DATE1 ----- -------------------- ----- -------------------- -------------------------------- ---------------- A 100 A 200 John 20111225 C 100 C 300 John 20111225 C 100 C 500 John 20111225 C 100 C 400 John 20111225 C 100 C 250 John 20111225 C 100 C 700 John 20111225 C 100 C 800 John 20111225 C 100 C 900 John 20111225 C 100 C 1000 John 20111225 C 100 C 1150 John 20111225 C 100 C 1275 John 20111225 C 100 C 3000 John 20111225
12 rows selected
I have done some searches and haven't seen any results.
1. In this table, how to update the Nth row, how can I do it
2. Now I need to add USERID in this table,which will get value from 1 to max no. of rows. I do not want to drop the table and again re create it adding USERID or update each row manually. Is there any other way to add USERID and have IDs from 1 to max IDs.
I created a table with a column "id" and values for this column is attached a sequence. And now i need, if any value deleted from the table the column "id" will need to be sequence.
ex:
id name -- ------- 1 xxxx 2 yyyy 3 zzzzz 4 pppp 5 rrrrrr
if i delete
delete from test where id=4;
then automatically.. "id" column values will again in sequence... like this
id name -- -------1 xxxxx 2 yyyyy 3 zzzzzz 4 rrrrrr
note: in the above if i delete the id=4 from the table again it will have be in sequence and if i inserted the again it has to take the next value continue to sequence....
ex : insert to test values(seq_name.nextval,'tttt');
I am updating a table column which is xml datatype and am getting above error.Below is the process what i did. since the xml is too large i split them into small chunks.
I am using Forms 6i,From my Form, user selects "sno" and upload BLOB image through OAF Upload utility. It stores the rowid of "SNO" and image...into Table "t1"...Now, i want to update the BLOB image into the original table"t2" using rowid..For this , i wrote the rowlevel trigger on Table "t1", in the trigger, i called a Procedure...In that procedure .. i am trying to update the BLOB column..It is not updating the BLOB column..But it is updating the Other values.. except BLOB column.
I have learnt that indexes slow down the DML operations. My question is specific to an update statement. Is it going to be slower if Im trying to update an indexed column on my table or it is slower overall (even when a non-indexed column is getting updated in the table) How does it behave in case of inserts & delete operation.
I have a task to update one of the rows in a table (having only 2 columns, number and long) which is long data type. We are on Oracle 10g. Not sure how to use update for a long data type column.
I have tried using dbms_metadata_util.long2varchar, but still not getting what I want.
I create the sample for master/detail form. In detail for prdcode,rate,qty,amount is there. When select prdcode it fetching prdcode,rate in a record and if you type the qty the amout will come based on formula(property) :qty*:rate.
It is available on screen. But when i store the data, in backend table the amount is be a null.
I am trying to update all rows of 100 column of a table with '0'. The column name is sequentially increasing one like EMP_1,EMP_2,EMP_3, etc. I tried using the below code but I am getting ora-06550 and ora-00927 error's.
begin FOR i in 1..100 loop UPDATE EMP_DETAILS SET EMP_'||i||' =0 END LOOP; COMMIT; END;
Here I want to update the chain_id & brand_id which are currently NULL in order to make every row eligible for further processing.
There is another table(say chain_brand) which maintains the relationship between chain_id and brand_id. one chain_id can have multiple brand_ids eg.,
chain_id brand_id 101 2011 101 2012 102 2020
Now I need a script that could randomly pick values from chain_brand table and update the accounts table. condition is those values should be unique for an account_id eg.,
Does the column V$SQL.CHILD_NUMBER related on number of current cursor only ? V$SQL lists statistics on shared SQL areas without the GROUP BY clause and contains one row for each child of the original SQL text enteredI see in V$SQL big numbers in V$SQL.CHILD_NUMBER ( HASH_VALUE and PLAN_ HASH_VALUE is in my quewry fixed ) , am I wrong that this column displayed not summary count of "objects"(in terminology of Steeve. URL....
I have a non-base-table item which I want to update in the pre-update trigger of the current block.
If the content of the field exceeds 4000 characters, i get the error message
ORA-01461: can bind a LONG value only for insert into a LONG column.
The code is
update tab set long_col = :formsblock.long_col where tab.tabpk = :formsblock.foreign_tabpk;
Workarounds would be, 1.) to delete the old dataset and insert the new one:
delete from tab where tab.tabpk = :formsblock.tabpk;
insert into tab (tabpk, long_col) values (:formsblock.foreign_tabpk, :formsblock.long_col);
or 2.) to change the Item from a non-database item to a database item and use the internal update of the forms-module, but both workarounds are not very satisfying.
Do you know another way to update the LONG-column within the pre-update trigger (or any other PL/SQL part of forms)?
I need to verify if the current date is grater than the 15th of the current month. If its grater than the 15th of the current month i need to do an action or if else its lesser than 15th of the current month i need to do an other operation.
