PL/SQL :: Legacy Data Migration Project - Cyclic Dependency Records
Mar 1, 2013
It's been a while since I worked with SQL Plus . I am using Oracle 11g. We are working on a legacy data migration project. I have a table of records with circular dependency records. i am trying to identify the records. I have the foll. columns- Product,Source,target. I want o identify the records which form a loop. For e.g.
Source Target
A B
B C
C D
D A
Last record forms a loop-I need to identify these records. My query is below-
SELECT DISTINCT SOURCE,TARGET FROM RULESELIB WHERE CONNECT_BY_ISCYCLE=1 CONNECT BY NOCYCLE SOURCE=PRIOR TARGET;
I ran this query on 2 tables- one with 75000 records and the other with 25000 records. It works fine on the table with 75000 records completes within a minute but it does not complete on the other table. I can't seem to be able to figure out the issue with the query or is there something about the data that is causing this query to loop infinitely?
I am working on database migration project SQL server to oracle, convert this query sql server to oracle basic thing i change but i still getting following error: ORA-01799: A column may not be outer joined to a subquery.
SELECT h.unique_id, h.customer_id, h.sequence_id, h.name_first, h.name_last, h.email, h.tn_work, h.tn_home, h.tn_cell, h.tn_work_do, h.tn_home_do, h.tn_cell_do, h.primary_contact_id,h.ssn, h.created, h.customer_status_id, h.doi, h.dod, NVL(CASE WHEN h.primary_contact_id = 1 THEN tn_home WHEN h.primary_contact_id = 2 THEN tn_cell WHEN h.primary_contact_id = 3 THEN tn_work END, '') AS ext_primary_contact, ext_customer_status_desc FROM customer c INNER JOIN customer_history h [code]...
Customer is sending data from legacy system (Source) with the web service which in turn calls a package lying on Oracle server (Target). Now this package is simply inserting data passed by legacy system into master staging table in Oracle database. When they started this process in Sept 2011 then 4 lack records were inserted into staging table. In Oct 11 it was 0 records Nov 11 it was 2 lack records, Dec 11 it was 1 lack records, in Jan 12 it was 1 lac records, Feb 12 73k records, Mar 12 0 records, Apr 12 52k records.
As we see that number of records inserted in the table got reduced with time.. what should be the starting point here since web service is calling that package on the fly, how can i enable trace for that package? I cannot replicate this is Dev as this process is only working in PROD.
I have to find the next EMP whose MAX_SQUENCE needs to be updated with a sequence. In this case the next would be '010' I fetched the EMP who falls after the max value of the column max_sequence in order of EMPCODE.
select emp_next from ( SELECT emp,max_sequence, LEAD(emp, 1, 0) OVER (ORDER BY emp) AS emp_next from test_emp_wip where wip > 0 ) where max_sequence=(select max(max_sequence) from test_emp_wip where wip > 0) EMP_NEXT 010 After sometime, the record would look like :-
I still have a legacy apps built using Forms 6i and Reports 6i running against Oracle 10g database on a Windows XP client and Windows 2008 server.It seems working well on Windows 7 client (32-bit only), but I think that it needs to test this apps.
We have our current production running on 9i and eventually want to migrate to 11g-r2. But the challenges are as follows:
9i production is running in San Francisco data center. 11g-r2 Production already setup up and running in Atlanta data center.
The database size is around 2 TB running on 9i. We are looking to transfer this to 11g-r2 and wondering, what options we have at our disposal: I was looking into EXP/IMP, but somebody said, dblinks will be much faster and reliable than EXP/IMP.
Now I want to change the deptno from 10 to 20 and 20 to 10 in dept table . So the ouput will be like
deptno| dname|dseq| 20 | CS | 1 10 | SC | 2
when i am deleting that row I am getting error "ORA-02292: integrity constraint (ROP_FK) violated - child record found".IF i am trying to update i am getting unique key contractin failure.
(Even I cannot update the rest of the column values in dept table as it is also having foreign key dependency) i need to put a sql script in production so that it will interchange.
we're planning a data migration from an application (oracle-based) to another (also with oracle db).
the origin is a ca. 80 GB database. so lots of millions of records are to be migrated. (before loading records into the destination tables, they have to be transformed).
the current concept is to receive all origin data in xml files, load them in a staging area (an own migration scheme in oracle), transform and load them into the destination tables.
we have three days for the whole migration (including extract from origin database, transform, load, backup after completion...).
my question is, that a migration with xml-files is a good concept. i think xml processing is much slower than doing the same with csv files. my proposal to migrate an oracle dump (so we got the original data in our staging area) was declined.
is migration mass-data with xml files good or are there performance or other issues?
I have created a new table, so that instead of having 26 columns for payment amount for each week, I want to have one column for pay amount and one column to represent the week as below
employee_id payroll_pay payroll_pay_week
how do I migrate the data from old table to the new table?
UPDATE projectdetails SET projectdetails.projectname=(SELECT projectid FROM project WHERE projectdetails.projectname = project.projectname);
but it returns with the error: single row subquery returns more than 1 row
I tried in the same PROJECTDETAILS table with another table A3, it works fine. but not for the PROJECT table.
Below is the project table (i have 2055 rows)
projectidprojectname1NEWEST2PARK WEST3THE VISION4PEOPLE'S PARK CENTRE5REFLECTIONS AT KEPPEL BAY6THE CLIFT7CLEMENTIWOODS CONDOMINIUM8HUNDRED TREES9PASIR VIEW PARK10CARABELLE11PARC IMPERIAL
below is the projectdetails table:
ProjectnameCORALS AT KEPPEL BAY20247502294883Strata101 to 05Jun-1399 yrs lease commencing from 20071CORALS AT KEPPEL BAY278688018901475Strata101 to 05Jun-1399 yrs lease commencing from 20071CORALS AT KEPPEL BAY15250502180700Strata101 to 05Jun-1399 yrs lease commencing from 20071ECHELON216298016471313Strata121 to 25Jun-1399 yrs lease commencing from 20121WHITEHAVEN135600012851055Strata101 to 05Jun-13Freehold1
While there's numerous QAs about inserting an image into the DB using the Data Block, how does one remove an image? Obviously there's the "UPDATE ... SET X = EMPTY_BLOB();", however, that kills the Data Block/Form's flow, and it doesn't update.
I've tried a few things:
* :CONTROL.IMG1 := NULL; (bad bind variable) * :CONTROL.IMG1 := EMPTY_BLOB(); (some other error, probably as above)
I need to migrate data from Mysql database to Oracle11g database.
a) is there any method available to import the all the sqls like table script,constraint scripts,data(insert ) script from Mysql.so that we can apply the sql directly to the oracle schema after making necessary changes(like datatype).
b) Is there any free tool available for the migration.
I need to generate in report using PL/SQL code for counting the number of rows of all the tables from source and target database..The report should consist of following columns..
table name|source table row count|target table row count|mismatch|..provide me the PL/SQL code?
the literature equates dimension hierarchies with fuctional dependencies between the levels. I like to tst the strength of this assumption with the implementation of 'CREATE DIMENSION' which allows you to create roll-up hierarchies.
My question to put it simply is this: Given:
CREATE DIMENSION location_dim LEVEL location IS (location.loc_id) LEVEL city IS (location.city) LEVEL state IS (location.state) HIERARCHY geog_rollup ( location CHILD OF city CHILD OF state CHILD )
Can I insert the following rows into the dimension: loc_id, city, state 1, Epping, NSW 2, Epping, VIC
Please note that the two Eppings are different cities.
Given the roll-up hierarchy City -> State, will it require that for every city there can be only one state in which case the FD between City and State cannot hold. Or, is it that the roll-up hierarchy defined here has nothing to do with FD.
The second part of the question is if the answer to the above question is that the roll-up is not the same as FD, then is the ATTRIBUTE clause meant to define the n:1 (functional dependency) instead?
I got an assignment to create Oracle 11g db. I will be provided the full datapump export dump of an Oracle 10g db in linux. I need to import it to 11g Database in Windows. I have no information about the tablespaces, users etc I have created db with system,sysaux,undotbs temp and users tablespaces.
We are planning to migrate data from an application called clintrace to another application called argus safety. Both the applications are related to pharmacovigilence safety operation. Both the applications functionality are similar. So both the database are having the same data though the table structures might be different. Both the database are oracle clintrace db is 9i and argus db is 11g.
We have a data migration scripts written for oracle. Data is not huge but we are observing that the migration is faster in the development labs but is 5x slower in the production site.
The development Oracle setup is on Windows and Production setup on Solaris. I have attached the AWR generated for a period where migration was run for 3 hours and stopped due to slow performance.
Here is my initial analysis.
1) The first timed events is the DB CPU. Hence I feel the migration scripts can be modified to run in parallel so that they can finish faster. However here the question arises why it should run faster in development env if this is an issue. 2) I tried increasing the a.large_pool_size set to 512M b.sga_max_size set to 8G c.sga_target set to 8G from 0, 4G and 4G respectively.
I have attached the AWR and below are the etc/system contents for solaris settings.
* Begin MDD root info (do not edit) rootdev:/pseudo/md@0:0,1,blk * End MDD root info (do not edit) set noexec_user_stack=1 set noexec_user_stack_log=1 * IBMdpo vpath_START (do not remove) * default SCSI timeout is 60 seconds * uncomment to change SCSI timeout * set sd:sd_io_time=0x1e forceload: drv/vpathdd * IBMdpo vpath_END (do not remove)
set noexec_user_stack=1 set semsys:seminfo_semmni=100 set semsys:seminfo_semmns=1024 set semsys:seminfo_semmsl=256 set semsys:seminfo_semvmx=32767 set shmsys:shminfo_shmmax=4294967295 set shmsys:shminfo_shmmin=1 set shmsys:shminfo_shmmni=100 set shmsys:shminfo_shmseg=10
P.S. The awr report is renamed to .txt from .html to be able to upload the file.
I have Arabic data stored into below two encodings in oracle AL32UTF8 database
1 Million rows into WE8MSWIN1252 .5 million rows into AR8MSWIN1256
in all cases I like to convert 1 Million row of WE8MSWIN1252 into AR8MSWIN1256. I could convert the data encoding from 1252 to 1256 using SQLdeveloper. But no luck using oracle export/import utility (both exp and expdp)…. I’m thinking may be certain locale is required for export/import to work.
Also my company said SQL developer is free utility may not be supported by oracle so use export and import for this, I need to convert only one table.
The best way to structure my schemas within a single Oracle instance to support multiple project development. At the moment, within an Oracle instance I have Area_Dev and Area1_Test schemas, with the intention that Project Xv1.0 would use Dev schema for development and Test schema for testing.
Lets say I want to start on Project Xv2.0 development while I am still finalizing Project Xv.10 development what is the best way of accommodating that, without creating individual schemas for each project?
