PL/SQL :: On Delete Cascade?
Oct 27, 2013
, we have used alter table to change the constraint in on delete cascade. there is two option. what is different between both ofthem. Example:1)Alter table t3 add constraint t2_F foreign key (id) references t2(id,column2,column3) on delete cascade ;or2)Alter table t3 add constraint t2_F foreign key (id) references t2 on delete cascade ;
know first one that particular column will set to on delete cascade.What is the use of second one in this case we are not using column name in "foreign key (id) references t2 on delete cascade ;"
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Oct 9, 2012
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.
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Mar 27, 2007
We have a bunch of tables with FKs but we do not have the 'on delete cascade' option on these FKs. If I want to delete records in the database do I have to write delete statements for each table starting with the lowest child or is there a cascade option I can use with the delete statement?
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May 9, 2011
I have a table with 2 defined FK constraints which fires delete cascade events.
I want to deny deletions when the event is fired from one of the tables and permit them when the event is fired from the other table.
Is it possible?
Is any way to solve which table fires the event?
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May 28, 2010
do we have ON_UPDATE_CASCADE? or there is no ON_UPDATE_CASCADE is oracle and we have just ON_DELETE_CASCADE
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Oct 9, 2012
The database is 11.2.0.3 on a linux machine. I issued the following command, but the session was a little slow. The table size is about 50 GB and has 3 indexes. I specified "degree=8" for parallel processing.
When gathering statistics on the table , parallel slaves were invoked and gathering statistics on the table has finished fast enough. However, when it goes to gathering statistics on the indexes, only one active session was invoked, and thus "degree=8" option was ignored.
My question is :
Do I need to use dbms_stats.gahter_index_stats instead of "cascade" option in order to gather statistic on the indexes with parallelism?
exec dbms_stats.gather_table_stats(ownname=>'SDPSTGOUT',tabname=>'OUT_SDP_CONTACT_HIS',estimate_percent=>10, degree=>8 , method_opt=>'FOR ALL COLUMNS SIZE 1',Granularity=>'ALL',cascade=>TRUE)
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May 16, 2011
what is the error in this procedure.I am getting error where s.msg_id = Tbl_Repo_Salo (i.msg_id));
Create or replace Procedure Proc_Stg_Clear(P_Err_Code OUT NOCOPY number,
P_err_msg OUT NOCOPY varchar2) as
v_count number;
Type Repo_Salo is table of Tbl_Tml_msg_Salo_Stg%ROWTYPE;
Type Repo_Smb is table of Tbl_Tml_msg_SMB_Stg%ROWTYPE;
[code]...
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Apr 9, 2010
i have one question that why oracle not set high water mark when we delete data from a table and commit it, on the other hand it set in case of truncate.both of these statement release physical structure(in case of delete after commiting)
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Apr 26, 2012
i have a problem that i have created a table named PROJECT and structure is like-
CREATE TABLE PROJECT
(
id VARCHAR2(250 BYTE) NOT NULL,
NAME VARCHAR2(250 BYTE) NOT NULL,
COMPID NUMBER NOT NULL,
[code]...
and this table is created in some number of different database then i want to delete the not null constraint of "id" column and there is 3 not null constraint in my table and i didnot gave name at the time of creation, so we cant delete it by its name in the script because there will be different name in another database for the same constraint. i want to make a script to delete the not null constraint because it is the part of my script.
how should i get proper information for deleting the constraint. and i used "user_constraints" but it shows same information for the all three "not null" constraint.
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Sep 30, 2010
this is my trigger..SQL> create or replace trigger drop_trigger
2 before drop on database
3 declare
4 PRAGMA AUTONOMOUS_TRANSACTION;
5 BEGIN
6 INSERT INTO ddl_log
7 SELECT ora_sysevent,ora_dict_obj_type, ora_dict_obj_owner,
8 ora_dict_obj_name,USER,SYSDATE,to_char(sysdate,'hh24:mi:ss')
9 FROM dual;
10 commit;
11 raise_application_error(-20090,'you can not drop');
12 end;
13 /
DÚclencheur crÚÚ. when a user enter a "drop table" for exemple, the trigger is run but we have this error message
SQL> drop table fg;
drop table fg
*
ERREUR Ó la ligne 1 :
ORA-00604: une erreur s'est produite au niveau SQL rÚcursif 1
ORA-20090: you can not drop
ORA-06512: Ó ligne 9
what can i do to delete the ORA-00604??
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Feb 22, 2010
How to delete one particular field value in a row?
Constraint: There should be no null value or zero instead of deleted value. Other values remain unchanged.
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Jun 27, 2010
I have a very huge table. There are many indexes.My focus is on the following indexes:
APT_DEDUCTIBLE A_PT_ORDREGBUS_UNIT
APT_DEDUCTIBLE A_PT_ORDREGMD_CODE
APT_DEDUCTIBLE A_PT_ORDREGPT_CODE
[Code]...
My Question is, since this 3 indexes has two columns "Bus_unit and Md_code", which index can i delete. Will they effect on database performance, if i delete one of them?
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May 22, 2013
From plan I would expect the delete command to be processed very quickly, however it does huge amounts of db block gets. I assume this is because of deleting the row from other structures (indexes, foreign keys in tables etc.) How can I find out which object scan caused the db block gets ?
SQL> delete from messages2 where id = 11004240718;
1 row deleted.
Elapsed: 00:00:03.79
Execution Plan
----------------------------------------------------------
Plan hash value: 140582024
[code]....
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Oct 29, 2010
How to delete SID name (oracle) from my computer ?
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Sep 15, 2010
I can delete the old archives with extension arc. Today, when I consult V$RECOVERY_FILE_DEST, there are files with today date. Can I delete these files, without danger the database?
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Sep 6, 2010
I'm attempting to write some SQL to delete a record where it doesn't exist in one of three other tables. My SQL is below:
SELECT COUNT(*) FROM GAZETTEER_ADDRESSES
WHERE NOT EXISTS (
SELECT MEDICALS.*, REVIEWS.*, ADDRESS_HISTORIES.*
FROM MEDICALS INNER JOIN REVIEWS
ON MEDICALS.GADDRE_IDENTIFIER = REVIEWS.GADDRE_IDENTIFIER
JOIN ADDRESS_HISTORIES
ON REVIEWS.GADDRE_IDENTIFIER = ADDRESS_HISTORIES.GADDRE_IDENTIFIER
WHERE GAZETTEER_ADDRESSES.IDENTIFIER = MEDICALS.GADDRE_IDENTIFIER);
When I attempt to run this I receive the following error: ORA-00600: internal error code, arguments: [qcopcovm2], [0], [], [], [], [], [], []
I know it's not generally a good idea to delete records but in this case a large number of cases are incorrect and need to be reinserted and this is the quickest way of doing it.
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Jun 15, 2007
i have used toad to create a tablespace say XYZ and user ABC from the system schema.
Now i want to delete this tablespace xyz.
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Feb 6, 2011
I having a problem with duplicate rows with a query.
What I have so far is
SELECT D.Student_Id,
E.Latest_Reg_Date,
E.Attendance_Count,
[Code].....
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Mar 14, 2011
I am trying to run following sql query,but it is throwing following error.
SQL> delete from b$gc_count_temp a INNER JOIN COMPLEMENTS ON b$gc_count_temp.CON
NECTION_ID_TEMP=COMPLEMENTS.feature_conn_id
2 WHERE a.current_designation is null and a.current_low is null and a.current
_high is null;
delete from b$gc_count_temp a INNER JOIN COMPLEMENTS ON b$gc_count_temp.CONNECTI
ON_ID_TEMP=COMPLEMENTS.feature_conn_id
*
ERROR at line 1:
ORA-00933: SQL command not properly ended
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Oct 19, 2011
I am using the below proc to delete some records
1)select client_id,count(*) from TCLIENT_NOTIFICATION_PACK where client_id=1620560178 group by client_id order by 2 desc;
client_id count(*)
----------- ---------
16205601785128
2)select client_id, count(*) from TCLIENT_NOTIFICATION_PACK
where client_id=1620560178
group by client_id
having count(*) > 40
order by 2 desc
client_id count(*)
----------- ---------
16205601785128
3) select client_id,clnt_notification_pack_tid
-- bulk collect into v_client_id,v_notif_tid
from (select clnt_notification_pack_tid,
client_id,
clnt_notification_pack_typ_tid,
crte_dt,
[code]....
4) Iam using the below proc to delete the rows from table, except the 4 rows returned above
declare
v_clnt_notification_pack_tid TCLIENT_NOTIFICATION_PACK.CLNT_NOTIFICATION_PACK_TID%type;
tYPE t_client_id is table of TCLIENT_NOTIFICATION_PACK.client_id%type;
tYPE t_notif_tid is table of TCLIENT_NOTIFICATION_PACK.clnt_notification_pack_tid%type;
v_client_id t_client_id;
v_notif_tid t_notif_tid;
[code]....
5) After running this procedure, i shud see 5124 records, but i see zero records.
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Mar 14, 2012
i have a flat file with fixed positions.Records of this file are having like empid empname deptname typeEx:
100 AAAA ADEPT I
101 BBBB BDEPT I
102 CCCC CDEPT U
103 DDDD DDEPT I
104 EEEE EDEPT D
Here value of type would be like I or U or D I have to load this file into oracle table in such a way that
if type value is I then i have to insert into table
if type value is U then i have to update this record in table
if type value is D then i have to delete this record from table.
I am using oracle10g.
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Jul 15, 2013
we are using oracle application server.
i want to delete or overwrite .FMX file while they are in use.
waiting for users to logout or finding out which user is logged in..is too time consuming.
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May 13, 2010
I am facing a problem while trying to delete an OS file using PL/SQL in Oracle8i v8.1.7.I have tried to use UTL_FILE.fremove but it is not supported in Oracle8i.
how can I delete a file Test.txt from C:Test location?
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Jul 7, 2011
I want to delete the duplicate rows in a table. there is no column which can be used to differentiate between the rows.
SELECT column_name1
FROM [table]
WHERE column_name2 = cond
GROUP BY column_name1
HAVING COUNT (column_name1) > 1
from the above query i can find the duplication in the table and can delete through it. But what i want one record of each duplication not to be deleted most probably the record added last to the table.
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Jan 18, 2013
delete table if exist
How do we write this code in oracle / sqlplus
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Jul 3, 2010
I am selecting around 10000 records in a recordset using an sql query.I need to delete these 10000 records from 10 different tables as each of the table have these records.I can use a FOR Loop for each record one by one to delete these 10K records from each tabel but i was wondering if i can delete there 10K in one go so that the program would Loop Only once rather thatn 10K times.
Mine Delete code looks like:
if x.first is not null then
for i in x.first..x.last loop
delete tbl_A where trade_id = x(i).trade_id;
delete tbl_B where trade_id = x(i).trade_id;
[code]...
Where x is the recordset having around 10K records.Is there any way i can run the loop only once rather than one by one for 10K times.
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Oct 25, 2006
How to delete even rows of a table or rather alternate rows of a table.
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May 21, 2010
I want to delete the duplicated record using following methods, it delete the records if all the record are matched according to condition, but if all records are not matched then it display error messages.
SQL> SELECT * FROM XYZ;
NAME FNAME ADDRESS JOB
-------------- -------------------- -------------------- -----------------------------------------
Bilal Khan Wali your rehman name district abbottabad student
Bilal Khan Wali your rehman name district abbottaba student
Bilal Kh Wali your rehma name district abbotta studen
Bilal K Wali your rehm name district abbotta studen
Bilal Khan Wali your rehman name istrict abbottaba tudent
lal Khan i your rehman name strict abbottaba tudent
[code]....
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Feb 19, 2012
Declare
Cursor Cur_Emp Is
Select Empno,Ename
From Emp;
Type Type_Emp Is Table Of Cur_Emp%Rowtype Index By Binary_Integer;
[code].......
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Jun 13, 2011
I have a table, in that i have "n" no of rows from that i want to delete 1% of rows from that table
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