SQL & PL/SQL :: Remove Orphaned Records From Child Table
May 24, 2011
I am facing below error while doing Schema refresh from production to development. I am facing this error in development database.
IMP-00003: ORACLE error 2264 encountered
ORA-02264: name already used by an existing constraint
IMP-00017: following statement failed with ORACLE error 2264:
"ALTER TABLE "TASKS" ADD CONSTRAINT "VALUE_CK" CHECK (wrkt_k"
"ow <> 'S') ENABLE NOVALIDATE"
i guess "need to Remove the orphaned child records from the child table (foreign key relationship), and then re-execute the ALTER TABLE ENABLE CONSTRAINT command."
how to find orphaned child records from child table ?
I want to delete records from parent table which are less than 2 years. Before deleting records from parent table we have to delete records from child table. How can we delete those records. I don't want to use ON DELETE CASCADE.
create table test (id number, last_name varchar2(15), first_name varchar2(15), empno varchar2(15))
select * from test;
insert into test values (143,'frank','kadel,watson','j2098,k09876'); insert into test values (143,'steve','kadel,watson','j0987i,kuy765'); [code]....
The requirement is as follows: I need to split the rows by first_name and assign the respective empno in the results child rows if there is any.
For example:- Where id = 143, the resultset should be like this.
ID LAST_NAME FIRST_NAME EMPNO ---------- --------------- --------------- --------------- 143 frank kadel j2098 143 frank watson k09876 143 steve kadel j0987i 143 steve watson kuy765
sofar, i am able to come with the query to split the records by last name but unable to find the way to extract the respective empno and assign to the splited records correctly.
I need to fech parent records only when no child record with status 'N' exists. There are only two possible values for status column of child table 'Y' / 'N'.
Below are table structures and insert statements for data.
CREATE TABLE MASTER ( COL1 NUMBER,
[Code]....
COMMIT;Query I framed is below
select * from master where exists (select null from child where child.col2 = master.col1 group by child.col2 having count(distinct col3) =1 )
Output in above case would be 3 as for 1 there's one record with status as 'N' and for 2 there's no child record. I am on 10g.
The attachment contains the table info. The condition is that when there are childer for the master ,the master record shd be negated . Excuse me if this very easy. Example -DEL HAS children so the record with DEL and DEL SHD not be in the result query. Example -RAG HAS NO children. so the MASTER record should be taken.
select am_obj_emp_obj(empno,ename,sal,deptno,service) from (select empno,ename,sal,deptno ,service from emp_vw where 1=1 and rownum < 2000 and service in ('MAN','SACH','SACL','KACL')) WHERE SAL = (SELECT MAX(SAL) FROM EMPS_VW WHERE DEPTNO = deptno or sal is null) union all
[code]...
This query is pulling 12 records of which 6 records are coming from the first query and the same 6 records is coming from the second query after union all Here am_obj_emp_obj is the object type and emp_vw is the view
Now I wanted to remove the duplicate records.When I implement the union operater it is giving me error.
ORA-22950: cannot ORDER objects without MAP or ORDER method.
I have to write a procedure that accepts schema name, table name and column value as parameters....I knew that i need to use metadata to do that deleting manually.
We have a table in the client database that has two columns - column parent and column child. The whole hierarchy of DB table dependencies is held in this table.If Report 1 is dependent on Table A and Table A in turn is dependent on two tables Table M and Table N. Table N is dependent on table Z it will appear in the db table as,
Hierarchy Table Parent Child Report1Table A Table ATable M Table ATable N Table NTable Z
Requirement :
From the above structure, we need to build a table which will hold the complete hierarchy by breaking it into multiple columns.The o/p should look like this
-ParentChild 1Child 2 Child 3 -Report1Table ATable M -Report1Table ATable N Table Z
Child 1, Child 2, Child 3 ....and so on are columns.The number of tables and the no of hierarchical relationships are dynamic.
SQL Statements to create hierarchy table:
create table hierarchy (parent varchar2(20), child varchar2(20)); insert into hierarchy values ('Report1','Table A'); insert into hierarchy values ('Report1','Table B'); insert into hierarchy values ('Table A','Table M'); insert into hierarchy values ('Table B','Table N'); insert into hierarchy values ('Report2','Table P'); insert into hierarchy values ('Table M','Table X'); insert into hierarchy values ('Table N','Table Y'); insert into hierarchy values ('Report X','Table Z');
Approached already tried :
1) Using indentation : select lpad(' ',20*(level-1)) || to_char(child) P from hierarchy connect_by start with parent='Report1' connect by prior child=parent;
2)Using connect by path function : select * from (select parent,child,level,connect_by_isleaf as leaf, sys_connect_by_path(child,'/') as path from hierarchy start with parent='Report1' connect by prior child =parent) a where Leaf not in (0);
Both the approaches give the information but the hierarchy data appears in a single column.Ideally we would like data at each level to appear in a different column.
I have got two tables emp_dtl and iou_tab. i have already made entries i.e booking no, emp_cd, emp_name etc in emp_dtl snc its my master table. I want to retrieve the booking nos through lov in iou_tab which are generated in emp_dtl and corresponding info of emp_cd and emp_name should come in the respected fields in iou_tab.
i need to find the parent and child from the table in this case the parent is Classics & Poetry and child is Literature & Anthologies..the way of getting only the parent and child record from this table.
I have a parent table and child table. I want a row to be deleted from the parent table which is referenced by a child row. Is there a way to achieve this. I dont have permission to re create the table or alter the table using delete cascade option. Is there a way to do it in sql.
SQL> create table t1(a number primary key, b number); SQL> create table t2(c number, d number references t1(a)); SQL> insert into t1 values(1,2); SQL> insert into t1 values(2,3); SQL> insert into t1 values(3,4); SQL> insert into t2 values(10,3); SQL> insert into t2 values(20,2); SQL> delete from t1 where a=2; delete from t1 where a=2 *
ERROR at line 1: ORA-02292: integrity constraint (CISBATCH.SYS_C00763501) violated - child record found
The manual work around on populating child tables for testing purpose are taking long time and its very painful work. So I am trying for a tool that takes parent table name and child table name as input and produce insert statements for child table with foreign keys as output.
I've a table TXN1 transaction and has FKs to 3 different tables Account, customer, country and currency. ALL FKs are indexed (bitmap). I am updating TXN1 of amount column about 10,000 rows. (SID 1) As expected, it has taken lock type 3 SX on TXN1. But it has taken on lock type 4 (share) on Account, customer and country. Committing every 10k rows.
At the same time sid 2 is inserting into another TXN2 table which has FK to the same dimensions account, customer and currency. Only FK on ac_id is bitmap indexed. The inserts have taken SX lock(type 3) on tXN2 table (expected). But it is trying to take SX type 3 lock on account, customer, currency tables. typ3 lock taken on CCY but waiting on CST. But It is blocked by sid 1. It has resulted into Enque-TM contention and resulted into anywhere 60-300 secs wait time..
I understand update/delete in parent table results into locking of SX of child tables and need the FKs to be indexed to avoid etc.
1. Why is SID1 taking shared lock on the parent tables Account,customer,country and currency tables? The update statement is not updating any of those FK columns nor referring them in where clause(if it matters!). Is it to ensure that the parent rows are not deleted?
2. Why is SID2 taking SX lock on the dimension tables? Why is it not taking RS lock type 2 on parent rows? Why is SID1 taking shared lock type 4, but not 2?
I have table emp that contains empno, empname, mgr .what i want is a general procedure that will take empno as input and will give all the child rows and parent for entered empno.
for ex
E A-->B-->C-->D F-->G H
When i will pass d as node it will return c,b,a,e,f,g,h
I am using the Oracle 10g and I have question related to "for Update" clause.We have the data warehouse db, so no foreign key constraint between parent and child.We process the data files every hour, the condition is If we find the row in parent table then we go and look into child tables and perform insertion (if no corresponding record is present) or updation (if one corresponding record is present) in the child table.
The problem is If I run the two process simultaneously for the same kind of data, and if no record is present in the child table then it create the duplicate in child table.My question is if I use FOR Update clause while selecting the data in parent table will it lock the child table for any insertion or updation?
Ex- We have employee table for employee 1
In my data files I have the row for employee 1, so when I run the select query on employee table I found 1 row.The I look the child table "Salary" as there is no record for emp_id =1 in this table I insert the record for this
Emp_id Salary 1 500
The problem is if both the process run at same time then I get duplicate rows in child table
Emp_id Salary 1 500 1 500
we do not want the duplicate row insertion. Can I lock the child table during first process run
that I need to insert into Child using seq_parent but I want to insert the same sequence for each group of rRef. I dont know how to do that using SQL not PL/SQL.
BANNER Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production PL/SQL Release 11.2.0.2.0 - Production CORE 11.2.0.2.0 Production TNS for Solaris: Version 11.2.0.2.0 - Production NLSRTL Version 11.2.0.2.0 - Production
I have loaded into an Oracle table defined as XMLTYPE. I'm okay with PL-SQL and stored procedures, where I will ultimately do this processing once I get a handle on XML DB querying from an XMLTYPE table.
Based on reading the oracle documentation about XML DB, and more importantly, reading dozens of posts to this forum,I have been successful in loading the XML files into a SQL XMLTYPE table and doing simple queries against that table to retrieve some of its data so that I can then insert that data into other target oracle relational tables.
how to select parent/child data from XMLTYPE tables. I am able to follow the forum examples and can replicate the methods shown on the many example XML contents shown on this forum, but not against the XML that I have to process. I am wondering if my struggle is caused by my lack of knowledge, or by ill-formed XML content supplied to me by the educational vendor.The XML content has structured the XML content nodes in such a way that I do not seem to be able to apply the parent/child sql methods.I have been able to use for other XML examples I have tested against.
My XML file shown below represents High School Transcript data, for which I need to be able to parse out into my own oracle relational tables for that student, his personal info, and his course info, etc. i.e., for our example, which courses he has taken for which High School grade levels. The vendor-supplied XML seems to put the Courses and the High School grade level in "parallel nodes," instead of parent/child nodes, so I am struggling to be able to use SQL to differentiate which course the student took in NinthGrade versus TenthGrade.
-- WHat I would like to determine from a select statement:
LASTNAME GradeLevel COURSETITLE ============================= Smith NinthGrade PHYS ED 101 Smith TenthGrade CALCULUS 201 Smith TenthGrade ZOOLOGY 202
(The data has been simpliied and masked, but is true to the content and is queryable).
select * from V$VERSION
BANNER Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit Production PL/SQL Release 11.2.0.2.0 - Production CORE 11.2.0.2.0 Production TNS for Solaris: Version 11.2.0.2.0 - Production NLSRTL Version 11.2.0.2.0 - Production [code]....
I am trying to update records in the target table based on the records coming in from source. For instance, if the incoming record is present in the target table I would update them in the target else I would simply insert. I have over one million records in my source while my target has 46 million records. The target table is partitioned based on calendar key. I implement this whole logic using Informatica. Looking at the informatica session log I find that the informatica code is perfectly fine but its in the update part it takes long time (more than 5 days to update one million records). find the TARGET TABLE query and the UPDATE query as below.
TARGET TABLE: CREATE TABLE OPERATIONS.DENIAL_REGRET_FACT ( CALENDAR_KEY INTEGER NOT NULL, DAY_TIME_KEY INTEGER NOT NULL, SITE_KEY NUMBER NOT NULL, RESERVATION_AGENT_KEY INTEGER NOT NULL, LOSS_CODE VARCHAR2(30) NOT NULL, PROP_ID VARCHAR2(5) NOT NULL, [code].....
I want to truncate table partition but I'm getting error:
CODEORA-02266: unique/primary keys in table referenced by enabled foreign keys
because of table has a nested table. Currently this column is not in use so I could drop it, but I want to avoid it (table is huge). Is there another posibility to do truncate partitions in this table? ALTER TABLE ... SET UNUSED doesn't resolve the problem.
We would like to remove the partitions from a particular table. The table in question has 12 partitions. Based on some initial investigation, I've come up with the following options. because the table we going to remove partition will have millions of records so on considering the db downtime we are looking for a alternative way. Is there a better way?
Copy data into another table, drop all partitions, then copy the data back into the original table Copy data into another table, drop the original table, then rename the new table and rebuild the indexes.
I have tried below steps for removing the table fregmentation but for some table i am not getting good result here.
1. It will collect the data which are having more than 100MB fragmentation.
select owner,table_name,blocks,num_rows,avg_row_len,round(((blocks*8/1024)),2)||'MB' "TOTAL_SIZE", round((num_rows*avg_row_len /1024/1024),2)||'Mb' "ACTUAL_SIZE", round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2) ||'MB' "FRAGMENTED_SPACE" from dba_tables where owner in('a','b','c','d') and round(((blocks*8/1024)-(num_rows*avg_row_len/1024/1024)),2) > 100 order by 8 desc;
2. then move the object(table) to the same tablespace.
alter table abc move; alter table bcd move; alter table efg move;
3. also rebuild the dependent objects.
alter index abc_PK rebuild online;
4. Then analyze the table which are having more than 100MB of fragmentation.
I have a parent table EMPLOYEE which includes columns (sysid, serviceno,employeename...) sysid is Primary key, serviceno is Unique key and I have child table DEPENDENT includes columns (sysid,employee_sysid,name,dob...) here again SYSID is primary key for DEPENDENTS table, employee_sysid is Foreign key of EMPLOYEE table.
Now I want to change SYSID (using sequence) in EMPLOYEE table which need to be update in DEPENDENTS table as well
Note: I have 10000 records in EMPLOYEE table as well as I have 5 more child tables which need to update new SYSID.
I am running the following delete query and it has been running for over 2hrs:
delete from dw.ACCOUNT_FACT where rowid in (select rowid from DW.ACCOUNT_FACT minus select max(rowid) from DW.ACCOUNT_FACT
[Code]..
Here is the explan plain result:
explain plan for delete from dw.ACCOUNT_FACT where rowid in (select rowid from DW.ACCOUNT_FACT minus select max(rowid) from DW.ACCOUNT_FACT group by CRTORD_FIPS_CD, LAST_PAYMENT_DT, ORDER_NUM,
Predicate Information (identified by operation id): ---------------------------------------------------
2 - access(ROWID="$kkqu_col_1")
I have all constraints disabled. How do I make this delete finish faster? We're trying to remove duplicates from this table using the criteria giving in the statement.
1.Is it necessary to reorganize a table and index after the deletion of records from table ? Because i see some change in table size after table and index reorganization.
2.Will re org table and index improve the database performance ?
