How to know primary key column name form a table name in sql query

Suppose I only know the table name. How to get its primary key column name from the table name?
Thanks

Views don't have primary keys though their underlying tables might. You'd need to pick apart the view to determine where it's columns are coming from.
You can select the text of the view in question from user_views.

Similar Messages

Knowing the primary key columns of the given table

Hi,
How can I get the primary key columns of the given table?
Regards,
Sachin R.K.

You can find the constraint_name from all_constraints/user_constraints for constraint_type = 'P' (which is the primary key constraint).
And then see which columns are in for the constriant_name
in all_cons_columns/user_cons_columns view.
Below is the example
select acc.column_name from
all_cons_columns acc, all_constraints ac
where acc.constraint_name = ac.constraint_name
and acc.table_name = 'DEPT' AND acc.owner = 'SCOTT'
and ac.constraint_type = 'P'
Hope this helps
Srinivasa Medam

How to update primary key column

Hi,
Can you suggest me best workaround/algorithm for below task:
(Oracle 10g, Solaris OS.)
Situation:
Table P has primary key column "Code", child tables F1, F2, ..., F15 reference with foreign key column "P_Code" column "P.Code", and we don't know which of the child tables has data for particular "P.Code" value.
Task:
Change "P.Code" value from 100 to 200. So that result would be that record P[Code = 100] should be updated as:
update P set
Code = 200
where Code = 100;And child tables column "P_Code" should be updated as:
update F1, F2, .., F15 set
P_code = 200
where P_code = 100;The best solution would be that one very easily can repeat that task.
Edited by: CharlesRoos on 28.12.2010 12:10

If you are looking for reusable and repetitive solution, then may be...
SQL> CREATE TABLE p (p_code NUMBER PRIMARY KEY);
Table created.
SQL> INSERT INTO p VALUES(100);
1 row created.
SQL> INSERT INTO p VALUES(300);
1 row created.
SQL> INSERT INTO p VALUES(500);
1 row created.
SQL> commit;
Commit complete.
SQL> CREATE TABLE F1 (p_code NUMBER REFERENCES p(p_code));
Table created.
SQL> CREATE TABLE F2 (p_code NUMBER REFERENCES p(p_code));
Table created.
SQL> CREATE TABLE F3 (p_code NUMBER REFERENCES p(p_code));
Table created.
SQL> INSERT INTO F1 VALUES(100);
1 row created.
SQL> INSERT INTO F3 VALUES(100);
1 row created.
SQL> INSERT INTO F2 VALUES(500);
1 row created.
SQL> commit;
Commit complete.
SQL> CREATE OR REPLACE PROCEDURE update_child_parent(pi_p_code_old NUMBER,
2                                                  pi_p_code_new NUMBER) IS
3    CURSOR table_to_update IS
4      SELECT table_name,
5             to_number(extractvalue(xmltype(DBMS_XMLGEN.getxml('SELECT count(*) c FROM ' ||
6                                                               table_name ||
7                                                               ' WHERE p_code=' ||
8                                                               pi_p_code_old)),
9                                    '/ROWSET/ROW/C')) cnt
10        FROM user_tables
11       WHERE table_name IN ('F1', 'F2', 'F3');
12
13 BEGIN
14    EXECUTE IMMEDIATE 'ALTER TABLE p DISABLE PRIMARY KEY CASCADE';
15    UPDATE p SET p_code = pi_p_code_new WHERE p_code = pi_p_code_old;
16    FOR i IN table_to_update LOOP
17      IF i.cnt > 0 THEN
18        EXECUTE IMMEDIATE 'UPDATE ' || i.table_name || ' SET p_code=' ||
19                          pi_p_code_new || ' WHERE p_code=' || pi_p_code_old;
20      END IF;
21    END LOOP;
22    EXECUTE IMMEDIATE 'ALTER TABLE p ENABLE VALIDATE PRIMARY KEY';
23 END update_child_parent;
24 /
Procedure created.
SQL> EXECUTE update_child_parent(100,200);
PL/SQL procedure successfully completed.
SQL> SELECT * FROM p;
    P_CODE
       200
       300
       500
SQL> SELECT * FROM F1;
    P_CODE
       200
SQL> SELECT * FROM F2;
    P_CODE
       500
SQL> SELECT * FROM F3;
    P_CODE
       200
SQL> INSERT INTO p VALUES(300);
INSERT INTO p VALUES(300)
ERROR at line 1:
ORA-00001: unique constraint (HR.SYS_C005931) violated
SQL> EXECUTE update_child_parent(500,900);
PL/SQL procedure successfully completed.
SQL> SELECT * FROM p;
    P_CODE
       200
       300
       900
SQL> SELECT * FROM F2;
    P_CODE
       900
SQL>

How to modify primary key column?

I want to modify one primary key column, But TT reported error.
How do I modify primary key column? Thanks first.

In TimesTen, the values in primary key columns cannot be updated (except for the trivial case where you update the value to the same value as it currently has). If you want to change the values stored in primary key columns the application must insert a new row with the new key values (and of course values for the other columns) and then delete the old row.
Chris

How to find out the primary key column of a database table?

Hi
Given the following scenario :
Given an inputfield, the user can enter a table name. The code behind will base on the table name given and extract out the fieldname of the primary key and concatenate the two field to become a unique string.
Eg. Order ID and Product ID make out a primary key.
How do i achieve that? Any code sample?
Regards,
Rayden

Check the below code :
REPORT zTest no standard page heading.
data : i_DD03P like DD03P occurs 0 with header line.
data v_table like DCOBJDEF-NAME.
parameters : p_table like dd02l-tabname.
start-of-selection.
v_table = p_table.
CALL FUNCTION 'BDL_DDIF_TABL_GET'
EXPORTING
    NAME                = v_table
   STATE               = 'A'
   LANGU               = 'E'
IMPORTING
GOTSTATE            =
DD02V_WA            =
DD09L_WA            =
TABLES
   DD03P_TAB           = i_DD03P
DD05M_TAB           =
DD08V_TAB           =
DD12V_TAB           =
DD17V_TAB           =
EXCEPTIONS
   ILLEGAL_INPUT       = 1
   OTHERS              = 2
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
loop at i_DD03P.
if i_dd03p-KEYFLAG = 'X'.
write:/ 'Key fields', i_dd03p-FIELDNAME.
endif.
endloop.
Thanks
Seshu

How to create unique key column in ROLAP fact table?

Hi all,
Is there a way to create a single column primary key (or unique index) on my ROLAP cube (and fact tables) in OWB? if so, what I should do in my mappings?
Thanks!
- Andrew

Have you all conformed dimensions between the two facts?

How to find a dependent row in the all tables using single SQL query

hi all,
I have created some table with master and some dependent tables.I want to mark a (row)tuple as inactive in master so that corresponding child records also should be marked as inactive.
So i decided to mark the master and dependent records as inactive starting from master table and traverse to child tables.
So I need SQL query to fetch all dependend records to the row(marked row in the master ) from the master table and dependent rows from the child row and to mark as flag inactive.
can anybody help me out to build this query or any other way to mark flag as inactive ?
Regards
punithan

You can find dependant tables from ALL_CONSTRAINTS, e.g:
SQL> CREATE TABLE m (id INT PRIMARY KEY, flag VARCHAR2(1) NOT NULL);
Table created.
SQL> CREATE TABLE d1 (m_id REFERENCES m, flag VARCHAR2(1) NOT NULL);
Table created.
SQL> CREATE TABLE d2 (m_id REFERENCES m, flag VARCHAR2(1) NOT NULL);
Table created.
SQL> SELECT table_name, owner, status
2 FROM   all_constraints c
3 WHERE c.constraint_type = 'R'
4 AND    ( c.r_owner, c.r_constraint_name ) IN
5         ( SELECT owner, constraint_name
6           FROM   user_constraints
7           WHERE table_name = 'M'
8           AND    constraint_type IN ('U','P') );
TABLE_NAME                     OWNER                          STATUS
D2                             WILLIAMR                       ENABLED
D1                             WILLIAMR                       ENABLED
2 rows selected.There is no SQL command to apply all updates in one go, if that's what you were looking for.
AFAIK the word "tuple" is for mathematics and relational theory, and does not refer to a physical row in a database.

OMPLUS retrieve table primary key column

I'm trying to retrieve the primary key column associated with a table via OMBPLUS.
The following command successfully returns the PK name
OMB+> OMBRETRIEVE TABLE 'ODS_REGION' GET PRIMARY_KEY
REGN_PKWhen I add the GET COLUMNS clause (as per API documentation), I'm still only getting the pk name.
OMB+> OMBRETRIEVE TABLE 'ODS_REGION' GET PRIMARY_KEY GET COLUMNS
REGN_PKAny suggestions on what I might be doing wrong?

Worked it out. Syntaxt needed is:
OMBRETRIEVE TABLE 'ODS_REGION' PRIMARY_KEY 'REGN_PK' GET COLUMNS
(no GET between table name and PRIMARY_KEY clause)

Missing primary key column in created form?

Please help. I am a newbie in apex.
When i create form and view it later I am missing primary key column.
HOw to make it show?
Thanks in advance.

Hi,
While creating the form based on a table/view, what have you chosen to populate the primary key value? Existing Triggers or Existing Sequences or Custom PL/SQL function?
Can you check for the Get PK pl/sql process in the page processing region of the related form page? If that function is missing then do the following steps to create the same,
Step 1 : Create a new pl/sql process.
Step 2 : Choose the Process Point as, On Submit After Computations and Validations.
Step 3 : Write the following block,
declare
function get_pk return varchar2
is
begin
    for c1 in (select TEST_SEQ.nextval next_val
               from dual) -- Create a new sequence for your requirement.
    loop
        return c1.next_val;
    end loop;
end;
begin
:P3_TEST := get_pk; -- Change the item name for your page.
end;After doing all the above, try executing the page.
Regards,
Sakthi.

How to commit primary key in a multi level form

Hi ,
I am using Jdeveloper 10.1.2.3. ADF - Struts jsp application.
I have an application that has multiple levels before it finally commits, say:
Level 1 - enter name , address, etc details -- Master Table Employee
Level 2 - Add Education details -- Detail Table Education
Level 3 - Experience -- Detail Table Experience.
Level 4 - adding a Approver -- Detail Table ApplicationApproval
In all this from Level 1 I generate a document number which is the primary key that links all these tables.
Now if User A starts Level 1 and moves to level 2,he gets document no = 100 and then User B starts Level 1 and also gets document no = 100 because no commit is executed.
Now I have noticed that system crashes if User B calls a vo.validate().
How can I handle this case as Doc no is the only primary key.

Hi,
This is what my department has been doing even before I joined and its been working for our multi user environment for these many years.
We have a table called DOC_SRNO which will hold a row for our start docno , next number in running sequence. the final number. We have this procedure that returns next num to calling application and increments the next num by 1 in the table. and final commit on the application commits all this.
I am not sure how this was working so far but each of those applications were for different employees. I am assuming this is how it worked.
Now in the application that I am working on, has no distinct value. So two users could generate the same docno and proceed.
I will try the DB sequence but here is what I tried. I call the next num from DOC_SRNO and I commit this table update and then proceed with this docno so at a time both gets different docno's.
But my running session crashes when I go to next level to insert into the detail table of my multi level form. Here when I try to get the current row from the vo which is in context, it crashes.
Here's the steps.
Three tables : voMainTable1 and voDetailTable1 and voDetailTable2.
voMainTable1 on create row1- I generate new docno - post changes
voMainTable1 on create row2- I genrate another docno - post changes
set voMainTable1 in context
Now I call voDetailTable1 and to get the docno to join master detail, I try to get voMainTable1.getCurrentRow. Here it crashes.
How can I avoid this

Primary key column in manual tabular form

I am creating a manual tabular form and am unsure what to do for my primary key column. When I do this with the wizard, I'm allowed to specifiy a Primary Key Source Type and the Primary Key Source (my sequence). Is there a way to do this in a manual tabular form?
I'm creating the column with the call 'wwv_flow_item.display_and_save(2,hours_id) hours_id' but when I edit the 'Tabular Form Element' section, I don't have the Primary Key fields anywhere to edit...only Reference Table Owner, Reference Table/Column Name. Where can I specify the sequence?
Thanks,
Janel

In the process ApplyMRD, try specifying the 'Secondary Key Column' in the section 'Source: Multi Row Update and Delete' to the second key column in the tabular form.
I haven't tested this with your situation, but worth a shot.

How can I modify a column to a primary key column

Hi,
I've created a table with no primary key. How I can set the primary key column now? The datatype of the "primary key" column is Raw(35).
Thanks,
Mike

Mike,
Issue the following command:
ALTER TABLE table_name
ADD CONSTRAINT constraint_name PRIMARY KEY(column_name);
NOTE: If you want to place the primary key data in a separate tablespace, then you can add the key word USING INDEX TABLESPACE after the column_name.
Regards,
John

How to change (decrease) primary key column length?

Hi all,
I have plenty of data in the table and I need to decrease the primary key column from CHAR(17) to CHAR(13).
I try to use:
ALTER TABLE xx MODIFY (prmy_key (13));
but Oracle give:
ERROR at line 1:
ORA-01441: column to be modified must be empty to decrease column length
Can anyone give me advice on what is the best way to decrease column length? Thanks in advance for your help.

To add to the above, I have done a simple test in the lines that I was suggesting the solution for this problem,
   CREATE TABLE testA
   (pk_col   varchar2(20), jd date, constraint pk1 PRIMARY KEY(pk_col));
   --Insert data into testA
   create table testB as select * from testA;
   TRUNCATE table testA;
   ALTER TABLE testA modify(pk_col VARCHAR2(10));
   INSERT INTO testA SELECT substr(pk_col, 1, 10), jd from testB;
   DROP TABLE testB;
   Select constraint_name, constraint_type, status from all_constraints
   Where table_name = 'TESTA';
   CONSTRAINT_NAME                C STATUS
   PK1                            P ENABLEDAlter command is successful as the table is empty. TRUNCATE flushes the data and resets the high water mark keeping all the constraints. If we safely want to use the TRUNCATE as far as storage issues are concerned,
TRUNCATE table table_name reuse storage;
I think, this would accoplish what has been asked.
Let me know,
SriDHAR

Hi cant see the primary key column in master detail form

I have a master detail form .In the first master form i am unable to see the primary key
Now the form is built completley and i also will like to see the primary key column visible in master report
If i had set the primary key as rowid then i could have seen the primary key ..
Now i can see the pencil icon (The eidt row pencil icon) instead of the actual primary key column . .which is a number data..
I will like that too be visible ..Can any one guide what should i do for this..
Thanks

Hi Mat,,
I am using apex 4.2 db version 11g and in the first master page i had set the value of combo which is primary key column as text
But still iam not able to see the number ..Note if i recreate the form ..with rowid as primary key i am able to see the column since the pencil icon(edit icon) is on row id..
Currently All i see is the edit icon ..I need both the edit icon and also the number ..
Thanks

Primary key in new form wizard

I tried to create a form with report using the New Form Wizards. But it seems always hidden the primary key and if I make changes to the generated form or report, I normally end up with broken pages. I found the forms in the example application are against tables with sequence backed primary key. But all our tables are not use that approach. Does anyone know any work around?
Another unrelated question about LOV? It seems the wizard require two different column to be used. If I want a list based on one column (like show all the possible value of one column), how can I do that?

<zq>
I tried to create a form with report using the New Form Wizards. But it seems always hidden the primary key and if I make changes to the generated form or report, I normally end up with broken pages. I found the forms in the example application are against tables with sequence backed primary key. But all our tables are not use that approach. Does anyone know any work around?
</zq>
<raj>
i just created a "Form with Report" and a "Form on a Table or View" using the wizards on htmldb.oracle.com which i accessed a few different ways, and they seemed to consistently expose the primary key of my table in the form. if you're referring to your primary key column in your report being rendered as an edit icon, you can change that from the report column attributes screen for your primary key column. just use the popup LOV for the "Link Text" field in the "Column Link" region of that screen to select the primary key value from your query rather than the html image tag that's there by default. also, if you'd like to, let us know what tweaks you're making to your generated forms/reports that result in errors. we should be able to help you with those, too.
i think the last part of your question above asks about using the wizards against tables that don't have sequence-backed primary keys. if so, i just did that on htmldb.oracle.com w/o issues. i might not be understanding your issue correctly, but it seems like you shouldn't have problems doing this. if so, though, please provide much more detail. we did have some issues with this stuff (and with the primary key column not being exposed as you mentioned above) in some earlier versions of html db. is it possible that you're not running of the most current version: 1.4.2.00.21 ?
</raj>
<zq>
Another unrelated question about LOV? It seems the wizard require two different column to be used. If I want a list based on one column (like show all the possible value of one column), how can I do that?
</zq>
<raj>
html db likes you to define your LOV queries using both a value to be displayed and a value to be returned to be submitted. if you'd like these values to be the same, simply select the same value twice from your table (being sure to alias the columns, which is always a good habit). so if you want to show and return all values of ename from emp, you could define your LOV query to be something like...
select ename my_display_val, ename my_return_val from emp order by 1
...and that'd do it.
</raj>
hope this helps,
raj

How to know primary key column name form a table name in sql query

Similar Messages

Maybe you are looking for