Solved

how we can filter out a nested table? or how we can use where clause in nested table?

Posted on 2012-03-22
4
510 Views
Last Modified: 2012-03-22
I have nested table like this

CREATE TABLE "MMS_STG1"."MMS_AUDIT"
   (      "AUDIT_ID" NUMBER,
      "TABLE_NAME" VARCHAR2(30),
      "DML_TYPE" VARCHAR2(30),
      "MODIFIED_USER" VARCHAR2(100),
      "TIMESTAMP" DATE,
      "CHANGE_HISTORY" "MMS_STG1"."TABLE_HISTORY_TAB" ,
       PRIMARY KEY ("AUDIT_ID")
   NESTED TABLE "CHANGE_HISTORY" STORE AS "HIST"

CREATE OR REPLACE TYPE "MMS_STG1"."TABLE_HISTORY_TAB" IS TABLE OF table_history;

CREATE OR REPLACE TYPE "MMS_STG1"."TABLE_HISTORY" AS OBJECT (
column_name varchar2(30),
new_value varchar2(4000),
old_value varchar2(4000)
);

>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>>

I can select from MMS_AUDIT in plsql developer, which gives a column for collection.
 but how I can filter out the collection. Based on the conditions in collections, I wanted to retrieve the records in MMS_AUDIT.
0
Comment
Question by:sakthikumar
  • 2
4 Comments
 
LVL 76

Accepted Solution

by:
slightwv (䄆 Netminder) earned 250 total points
ID: 37752638
0
 
LVL 73

Expert Comment

by:sdstuber
ID: 37753042
please provide sample data and expected output
0
 
LVL 27

Assisted Solution

by:sujith80
sujith80 earned 250 total points
ID: 37753209
See this example.I have used your objects as an exmaple.
You can use TABLE clause to un-nest the nested table.

SQL> insert into mms_audit
  2  values(
  3  100,
  4  'test1',
  5  TABLE_HISTORY_TAB(TABLE_HISTORY('col1', 'new1', 'old1'), TABLE_HISTORY('col2', 'new2', 'old2'))
  6  );

1 row created.

SQL>
SQL> insert into mms_audit
  2  values(
  3  200,
  4  'newtable',
  5  TABLE_HISTORY_TAB(TABLE_HISTORY('newcol', 'new1', 'old1'), TABLE_HISTORY('newcol2', 'new2', 'old2'))
  6  );

1 row created.

SQL>
SQL> select audit_id, table_name, column_name, new_value, old_value
  2  from mms_audit m, table(m.change_history);

  AUDIT_ID TABLE_NAME                     COLUMN_NAME                    NEW_VALUE  OLD_VALUE
---------- ------------------------------ ------------------------------ ---------- ----------
       100 test1                          col1                           new1       old1
       100 test1                          col2                           new2       old2
       200 newtable                       newcol                         new1       old1
       200 newtable                       newcol2                        new2       old2

SQL>
SQL> select audit_id, table_name, column_name, new_value, old_value
  2  from mms_audit m, table(m.change_history)
  3  where column_name = 'newcol1';

no rows selected

SQL> select audit_id, table_name, column_name, new_value, old_value
  2  from mms_audit m, table(m.change_history)
  3  where column_name = 'newcol';

  AUDIT_ID TABLE_NAME                     COLUMN_NAME                    NEW_VALUE  OLD_VALUE
---------- ------------------------------ ------------------------------ ---------- ----------
       200 newtable                       newcol                         new1       old1

Open in new window

0
 
LVL 76

Expert Comment

by:slightwv (䄆 Netminder)
ID: 37753238
>>You can use TABLE clause to un-nest the nested table.

Aside from using the names in the original post, isn't that basically the same as the example in the link I posted?
0

Featured Post

Live: Real-Time Solutions, Start Here

Receive instant 1:1 support from technology experts, using our real-time conversation and whiteboard interface. Your first 5 minutes are always free.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Article by: Swadhin
From the Oracle SQL Reference (http://download.oracle.com/docs/cd/B19306_01/server.102/b14200/queries006.htm) we are told that a join is a query that combines rows from two or more tables, views, or materialized views. This article provides a glimps…
Cursors in Oracle: A cursor is used to process individual rows returned by database system for a query. In oracle every SQL statement executed by the oracle server has a private area. This area contains information about the SQL statement and the…
This video shows how to set up a shell script to accept a positional parameter when called, pass that to a SQL script, accept the output from the statement back and then manipulate it in the Shell.
This video shows information on the Oracle Data Dictionary, starting with the Oracle documentation, explaining the different types of Data Dictionary views available by group and permissions as well as giving examples on how to retrieve data from th…

785 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question