View the tables with same column name

Hi all
I have 10-20 tables and they have some same column names
How can I know it?
I mean, I want to know the tables which have the common column names
Thanks...

SQL> break on column_name
SQL> set linesize 1000
SQL> set pagesize 10000
SQL> select column_name, owner, table_name
2 from (select owner, table_name, column_name, count(*) over (partition by column_name) ct
3        from dba_tab_columns)
4 where ct>1
SQL> /
COLUMN_NAME                    OWNER                          TABLE_NAME
AADSAS_ID_NBR                  H89UCBAC                       PS_SAD_ADA_CD
                               H89UCBAC                       PS_SAD_ADA_SUS
                               H89UCBAC                       PS_SAD_ADA_TMP
AA_CODE                        H89UCBAC                       PS_RQ_CONDIN_SLVW
                               H89UCBAC                       PS_RQ_CONDIN_SRCH
                               H89UCBAC                       PS_DUMMYDESCR_LANG
                               H89UCBAC                       PS_DUMMY_DESCR
                               H89UCBAC                       PS_RQ_NOTINCOND_LV
                               H89UCBAC                       PS_RQ_NOTINCOND_SR
[...]Nicolas.

Similar Messages

Where statement on two different tables with same column name

Hello,
I have 2 financial tables:
tblincome, tblexpenses
in each table I have column name "monthPayed" (have values of all the months of the year).
I would like to create a balance view table that will show me the financial status for the Q1 (for example).
I have a column totalIncome and totalExpended respectively.
I've create a view table that shows me the financial balance at the moment but I want it to be devide to Quarters of the year...
Regards

Please post DDL, so that people do not have to guess what the keys, constraints, Declarative Referential Integrity, data types, etc. in your schema are. Learn how to follow ISO-11179 data element naming conventions and formatting rules. Temporal data should
use ISO-8601 formats. Code should be in Standard SQL as much as possible and not local dialect.
This is minimal polite behavior on SQL forums. Where is the code you already tried? Or are you so lazy, so rude or so privileged that you did not do anything for yourself?
In fact that silly “tbl-” prefix is so bad that it has a name! It is called Tibbling and Phil Factor even wrote a humor article on bad programmers that use it.
Your narrative is vague; it sounds like this is the DDL:
CREATE TABLE Incomes
(payment_month CHAR(10) NOT NULL PRIMARY KEY,
income_amt DECIMAL(12,2) NOT NULL
CHECK (income_amt > 0.00),
CREATE TABLE Expenses
(payment_month CHAR(10) NOT NULL PRIMARY KEY,
expense_amt DECIMAL(12,2) NOT NULL
CHECK (expense_amt > 0.00),
>> in each table I have column name "monthPayed" (have values of all the months of the year). <<
I hope not! 2014 has not gotten to September, November or December yet! And the ISO-11179 data element name should be “payment_month”; but it is still wrong! An expense is not a payment! An income is not a payment!
>> I would like to create a balance view table that will show me the financial status for the Q1 (for example). <<
Report Period Table
Since SQL is a database language, we prefer to do look ups and not calculations. They can be optimized while temporal math messes up optimization. A useful idiom is a report period calendar that everyone uses so there is no way to get disagreements in the DML.
The report period table gives a name to a range of dates that is common to the entire enterprise.
CREATE TABLE Something_Report_Periods
(something_report_name CHAR(10) NOT NULL PRIMARY KEY
CHECK (something_report_name LIKE <pattern>),
something_report_start_date DATE NOT NULL,
something_report_end_date DATE NOT NULL,
CONSTRAINT date_ordering
CHECK (something_report_start_date <= something_report_end_date),
etc);
These report periods can overlap or have gaps. I like the MySQL convention of using double zeroes for months and years, That is 'yyyy-mm-00' for a month within a year and 'yyyy-00-00' for the whole year. The advantages are that it will sort with the ISO-8601
data format required by Standard SQL and it is language independent. The pattern for validation is '[12][0-9][0-9][0-9]-00-00' and '[12][0-9][0-9][0-9]-[01][0-9]-00'
Now figure it out for yourself, show us what effort you put into this, then we will help you.
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL

View of tables with double column names

Hello,
my problem is that in my database schema the name of the primary-key-column in one table has the same name as the corresponding foreign key-column in another table. Now i want to create a view of those two tables and get an error (double column names).
Is there any chance to avoid this error without rename all my column names (cause this happens many many times)?
Thanks for any help.
Christoph

Hi,
In SQL you cas prefix the column with its data container. Use this and it'll be OK. This is not an error, it's expected and absolutely normal behaviour.
SQL> desc dual
Name Null? Type
DUMMY VARCHAR2(1)
SQL> select D1.DUMMY, D2.DUMMY
2 FROM DUAL D1, DUAL D2
3 WHERE D1.DUMMY = D2.DUMMY;
D D
X XRegards,
Yoann.

How To Create Table View With Same Column name But Different Table?

Hi All,
I have the problem to create a tableview with same column name but in different table.
The Table that i have:-
Table - PAC051MPROFORMA
Column - mrn,visitid
Table - PAC051TPROFORMA
Column - mrn,visitid
Table - PAC052MTRANSBILL
Column - mrn,visitid
Then i want to create a table view to view that table. This is my SQL
CREATE VIEW pacviewproforma (mrn,visitid,mrn,visitid,mrn,visitid)
As Select PAC051MPROFORMA.mrn,PAC051MPROFORMA.visitid,PAC051TPROFORMA.mrn,PAC051TPROFORMA.visitid,PAC052MTRANSBILL.mrn,PAC052MTRANSBILL.visitid
where
*(a.PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)*
and
*(a.PAC051TPROFORMA.mrn=PAC052TRANSBILL.mrn)*
That SQL Return this error = ORA-00957: duplicate column name
Then I modify that SQL to
CREATE VIEW pacviewproforma (mrn,visitid)
As Select PAC051MPROFORMA.mrn,PAC051MPROFORMA.visitid,PAC051TPROFORMA.mrn,PAC051TPROFORMA.visitid,PAC052MTRANSBILL.mrn,PAC052MTRANSBILL.visitid
where
*(a.PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)*
and
*(a.PAC051TPROFORMA.mrn=PAC052TRANSBILL.mrn)*
This time this error return = ORA-01730: invalid number of column names specified
What should i do?
Thanks...

Hi,
SQL> CREATE VIEW pacviewproforma (mrn,visitid,mrn,visitid,mrn,visitid)
2 As Select
3 PAC051MPROFORMA.mrn,
4 PAC051MPROFORMA.visitid,
5 PAC051TPROFORMA.mrn,
6 PAC051TPROFORMA.visitid,
7 PAC052MTRANSBILL.mrn,
8 PAC052MTRANSBILL.visitid
9 from PAC051MPROFORMA,PAC051TPROFORMA,PAC052MTRANSBILL
10 where
11 (PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)
12 and
13 (PAC051TPROFORMA.mrn=PAC052MTRANSBILL.mrn);
CREATE VIEW pacviewproforma (mrn,visitid,mrn,visitid,mrn,visitid)
ERROR at line 1:
ORA-00957: duplicate column namePlease give different names to each column.
Something like this..
SQL> CREATE OR REPLACE VIEW pacviewproforma (MPROFORMA_mrn,MPROFORMA_visitid,TPROFORMA_mrn,TPROFORMA
_visitid,MTRANSBILL_mrn,MTRANSBILL_visitid)
2 As Select
3 PAC051MPROFORMA.mrn,
4 PAC051MPROFORMA.visitid,
5 PAC051TPROFORMA.mrn,
6 PAC051TPROFORMA.visitid,
7 PAC052MTRANSBILL.mrn,
8 PAC052MTRANSBILL.visitid
9 from PAC051MPROFORMA,PAC051TPROFORMA,PAC052MTRANSBILL
10 where
11 (PAC051MPROFORMA.mrn=PAC051TPROFORMA.mrn)
12 and
13 (PAC051TPROFORMA.mrn=PAC052MTRANSBILL.mrn);
View created.
SQL> DESC pacviewproforma;
Name                                      Null?    Type
MPROFORMA_MRN                                      NUMBER
MPROFORMA_VISITID                                  NUMBER
TPROFORMA_MRN                                      NUMBER
TPROFORMA_VISITID                                  NUMBER
MTRANSBILL_MRN                                     NUMBER
MTRANSBILL_VISITID                                 NUMBER
ORA-01730: invalid number of column names specifiedThe list of column nmae you specified during the CREATE VIEW should match with the SELECT list of the view.
Twinkle

Many to many join table with different column names

Hi have a joint table with different column names as foreign keys in the joining
tables...
e.g. i have a many to many reltnshp btwn Table A and Table B ..and join table
C
both have a column called pk.
and the join table C has columns call fk1 and fk2
does cmd require the same column name in the join table as in the joining table?
are there any workarounds?
thanks

HI,
No, the foreign key column names in the join table do not have to match the primary
key names in the joined tables.
-thorick

Deleting from multiple tables where few tables have same column name

Hi,
I am new to PL/SQL and need some help. I need to delete data older then X years from some 35 odd tables in my schema and out of those tables 25 tables have same column name on which i can have my "where" clause and rest 10 table have different table names. I am doing something like this :
declare
table_list UTL_FILE.FILE_TYPE;
string_line VARCHAR2(1000);
tables_count number:=0;
table_name VARCHAR2(400);
column_name VARCHAR2(400);
BEGIN
table_list := UTL_FILE.FOPEN('ORALOAD','test7.txt','R');
DBMS_OUTPUT.PUT_LINE(table_list);
LOOP
UTL_FILE.GET_LINE(table_list,string_line);
table_name := substr(string_line,1, instr(string_line,'|')-1);
column_name := substr(string_line, instr(string_line,'|')+1);
DBMS_OUTPUT.PUT_LINE(table_name);
DBMS_OUTPUT.PUT_LINE(column_name);
IF column_name = 'SUBMISSION_TIME' THEN
delete from :table_name where to_date(:column_name)<(sysdate-(365*7));
ELSE
delete from || table_name || where ( || to_date(column_name) || ) <(sysdate-(365*7));
END IF;
END LOOP;
EXCEPTION
WHEN NO_DATA_FOUND THEN
UTL_FILE.FCLOSE(table_list);
DBMS_OUTPUT.PUT_LINE('Number of Tables processed is : ' || tables_count);
UTL_FILE.FCLOSE(table_list);
END;
WHERE the text file "text7.txt" contains list of table name and column names separated by a pipe line. But when I execute the above proc it gives error "invalid table name".
Can something like this be done or is there any other way to execute this task of deletion from 35 tables.
Thanks.

Thanks for replies. I don't know what I am doing wrong but still not getting this damn thing work...This is the proc i am running now :
declare
table_list UTL_FILE.FILE_TYPE;
string_line VARCHAR2(1000);
tables_count number:=0;
table_name VARCHAR2(4000);
column_name VARCHAR2(4000);
code_text VARCHAR2(2000);
BEGIN
table_list := UTL_FILE.FOPEN('ORALOAD','test7.txt','R');
LOOP
UTL_FILE.GET_LINE(table_list,string_line);
table_name := substr(string_line,1, instr(string_line,'|')-1);
column_name := substr(string_line, instr(string_line,'|')+1);
IF column_name = 'SUBMISSION_TIME' THEN
DBMS_OUTPUT.PUT_LINE('do nothing');
ELSE
code_text:= 'begin delete from'|| (table_name) ||'where to_date' || (column_name) || '<(sysdate-(365*7))';
Execute Immediate code_text;
END IF;
END LOOP;
EXCEPTION
WHEN NO_DATA_FOUND THEN
UTL_FILE.FCLOSE(table_list);
DBMS_OUTPUT.PUT_LINE('Number of Tables processed is : ' || tables_count);
UTL_FILE.FCLOSE(table_list);
END;
But it gives following error :
" ORA-06550: line 1, column 51:
PL/SQL: ORA-00933: SQL command not properly ended
ORA-06550: line 1, column 7:
PL/SQL: SQL Statement ignored
ORA-06550: line 1, column 68:
PLS-00103: Encountered the symbol "end-of-file" when expecting one of the following:
ORA-06512: at line 22 "

How to join two columns between two tables with different column names

Hi
How i can join 2 columns with different names between the 2 tables.
Can any one please give solution for this.
Thanks
Manu

Hi,
basic understanding of joins:
If you want to join 2 tables there should be matching column w.r.t. data and it's data type. You need not to have same column names in both the tables...
so, find those columns which has got same values..

Numerous ALV Issues - Saved Initial View shows table with no columns

Saved a personal View and made it initial. View was saved by Sorting and FIltering certain columns. When I retrive the view, it shows the tabke has no columns at all.
This is in addition to the Problem in getting DropdownbyKey inside a ALV Table Cell in DropdownByKey inside ALV Table - Problem with Value set
Regards,

You have forgotten to set a cell variant. I had the same with setting a ProgressIndicator cell-editor to a table column as default editor. This causes the column to be hidden on the table while it did show up in the settings dialog. I removed the set_editor( lr_progressindicator) and created a cell variant instead with this lr_progressindicator. You then need to add this cell variant to your column. By default it will select the standard viewtext-cell-editor (which can only be textview and inputfield, like when you create a table yourself in a view), but if you use a cell variant, it will display the required cell editor if you set it (last line of the code).
<b>In your case, replace lr_progressindicator by your ref_dropdownkey.</b>
DATA: lr_column_settings    TYPE REF TO if_salv_wd_column_settings,
        lr_column             TYPE REF TO cl_salv_wd_column,
        lr_column_header      TYPE REF TO cl_salv_wd_column_header,
        lr_cellvar            TYPE REF TO cl_salv_wd_cv_standard,
        l_cellvar             TYPE string,
        lr_progress_indicator TYPE REF TO cl_salv_wd_uie_progr_indicator.
lr_column_settings ?= wd_this->mr_table.
lr_column = lr_column_settings->get_column( 'STATUSBAR' ).
lr_column_header = lr_column->get_header( ).
lr_column_header->set_text( 'Completed' ).
CREATE OBJECT lr_cellvar.
l_cellvar = 'CV_SB'.
lr_cellvar->set_key( l_cellvar ).
CREATE OBJECT lr_progress_indicator.
lr_progress_indicator->set_percent_value_fieldname( 'STATUSBAR' ).
lr_progress_indicator->set_tooltip( 'completed' ).
lr_cellvar->set_editor( lr_progress_indicator ).
lr_column->add_cell_variant( lr_cellvar ).
lr_column->set_selected_cell_variant( l_cellvar ).
I hope this will solve your issues.

Compare tables in two schemas for the table with particular column & value

Hello All,
I have a query to find out the list of table from a given schema to extract all the tables having a search column .
ex :
SELECT OWNER, TABLE_NAME, COLUMN_NAME FROM
ALL_TAB_COLUMNS WHERE OWNER='<SCHEMA_NAME>'
AND COLUMN_NAME='<COLUMN_NAME>'
I want to compare two schemas for the same above query .
Can we wirte a query on this - I am using SQL DEVELOPER , which has menu item - TOOL - database differneces to find the diffenence between two schemas but my requirement is to find the differences in two schemas for all the tables matching for a particular column ( as given in quer).
Appreciate your help.
thanks/Kumar
Edited by: kumar73 on 29 Nov, 2012 1:50 PM

Hi, Kumar,
This is the SQL and PL/SQL forum. If you have a question about SQL Developer, then the SQL Developer is a better place to post it. Mark this thread as "Answered" before starting another thread for the same question.
If SQL Developer has a tool for doing what you want, don't waste your time trying to devise a SQL solution. The SQL Developer way will probably be simpler, more efficient and more reliable.
If you do need to try a SQL solution, then post some sample data (CREATE TABLE and INSERT statements for a table that resembles all_tab_columns; you can call it my_tab_columns) and the results you want from that data.

Retrieving Data from different Tables with same tuple name

Hi,
I am made the following query from different tables. A tuple "name" is appearing in some tables. So when I run the qiery in a Java class, it delivers the same result of c.name, bpl.name and p.name. The result of c.name is correct, but the other 2 names are overwritten. It works perfect in a postgreSql query tool. How can I correct it, plz?
SELECT c.ad_client_id, c.name, o.c_order_id, o.ref_order_id, bp.name, bpl.name, o.dateordered, o.datepromised, od.c_orderline_id,p.m_product_id,p.name, cur.iso_code, od.qtyordered
FROM adempiere.ad_client c, adempiere.c_order o, adempiere.c_orderline od, adempiere.c_bpartner bp, adempiere.m_product p, adempiere.c_bpartner_location bpl, adempiere.c_currency cur
WHERE c.ad_client_id =11 and c.ad_client_id = o.ad_client_id and bp.c_bpartner_id=o.c_bpartner_id and o.c_order_id = od.c_order_id and od.m_product_id = p.m_product_id and o.c_bpartner_location_id =bpl.c_bpartner_location_id and o.c_currency_id=cur.c_currency_id;
Cheers

Hi,
create alias, if u have similar field names as below. Use the alias name (rs.getString("cname") and rs.getString("bpname") and so on ) to retrive data.
SELECT c.ad_client_id, c.name as cname, o.c_order_id, o.ref_order_id, bp.name as bpname, bpl.name as bplname, o.dateordered, o.datepromised, od.c_orderline_id,p.m_product_id,p.name as pname, cur.iso_code, od.qtyordered
FROM adempiere.ad_client c, adempiere.c_order o, adempiere.c_orderline od, adempiere.c_bpartner bp, adempiere.m_product p, adempiere.c_bpartner_location bpl, adempiere.c_currency cur
WHERE c.ad_client_id =11 and c.ad_client_id = o.ad_client_id and bp.c_bpartner_id=o.c_bpartner_id and o.c_order_id = od.c_order_id and od.m_product_id = p.m_product_id and o.c_bpartner_location_id =bpl.c_bpartner_location_id and o.c_currency_id=cur.c_currency_id;Regards,
Ram

Replication on the table with XMLType column and schema registered

Dear All,
Does Oracle XML DB 11g support replication for tables with schema registered?
Is there any recommended approach?
Thanks and regards,
Swapnil

Hmmmm ... I don't know if I should smile or frown with the implication that I am an OO guy :D :D
Most of my colleagues when I started working as a software engineer, treated me as too low-level because of my C background (started doing C in 1985).
In my last job, my colleagues hated my guts because I was asking them to squeeze every bit of performance out of C++ by using STL which is definitely not OO (although C++ is).
My current colleagues treat me as a DB guru (which I most definitely am not) and they overlook/forget the fact that most of them use Java libraries in their projects, that I wrote for them !
I am inclined to believe that I do not fall into any category in the end...
The only thing I am for sure - and I am proud of it - is inquisitive. I want to know everything there is about the tools I use, and so I end up spending hours and hours investigating... (Microsoft found that out the hard way when I filed 16 bug reports in 8 days when Visual C++ 6 came out ! Not that it hurt them though...)
This is where my confession ends (and my working on the XML validator starts...)
Καληνύχτα Marco
Philip (Φίλιππος in Greek)
PS: I did not follow the last solution anyway. I just wanted to verify its operability ;)

Query to get the records with same last name

I need to write a single sql query to get all records with duplicate last_name's. For example, if tab1 has 4 records:
10     Amit     Kumar
20     Kishore          Kumar
30     Sachin     Gupta
40     Peter     Gabriel
then the query should return
10     Amit     Kumar
20     Kishore     Kumar
id, name,L_name being the 3 columns in table
Apprecite you help.
Thank you
Mary

SQL> create table mytable (id,name,l_name)
2 as
3 select 10, 'Amit', 'Kumar' from dual union all
4 select 20, 'Kishore', 'Kumar' from dual union all
5 select 30, 'Sachin', 'Gupta' from dual union all
6 select 40, 'Peter', 'Gabriel' from dual
7 /
Table created.
SQL> select id
2       , name
3       , l_name
4    from ( select t.*
5                , count(*) over (partition by l_name) cnt
6             from mytable t
7         )
8   where cnt > 1
9 /
                                    ID NAME    L_NAME
                                    10 Amit    Kumar
                                    20 Kishore Kumar
2 rows selected.Regards,
Rob.

How can i export the data to excel which has 2 tables with same number of columns & column names?

Hi everyone, again landed up with a problem.
After trying a lot to do it myself, finally decided to post here..
I have created a form in form builder 6i, in which on clicking a button the data gets exported to excel sheet.
It is working fine with a single table. The problem now is that i am unable to do the same with 2 tables.
Because both the tables have same number of columns & column names.
Below are 2 tables with column names:
Table-1 (MONTHLY_PART_1)
Table-2 (MONTHLY_PART_2)
SL_NO
SL_NO
COMP
COMP
DUE_DATE
DUE_DATE
U-1
U-1
U-2
U-2
U-4
U-4
U-20
U-20
U-25
U-25
Since both the tables have same column names, I'm getting the following error :
Error 402 at line 103, column 4
alias required in SELECT list of cursor to avoid duplicate column names.
So How can i export the data to excel which has 2 tables with same number of columns & column names?
Should i paste the code? Should i post this query in 'SQL and PL/SQL' Forum?
Help me with this please.
Thank You.

You'll have to *alias* your columns, not prefix it with the table names:
$[CHE_TEST@asterix1_impl] r
1 declare
2    cursor cData is
3      with data as (
4        select 1 id, 'test1' val1, 'a' val2 from dual
5        union all
6        select 1 id, '1test' val1, 'b' val2 from dual
7        union all
8        select 2 id, 'test2' val1, 'a' val2 from dual
9        union all
10        select 2 id, '2test' val1, 'b' val2 from dual
11      )
12      select a.id, b.id, a.val1, b.val1, a.val2, b.val2
13      from data a, data b
14      where a.id = b.id
15      and a.val2 = 'a'
16      and b.val2 = 'b';
17 begin
18    for rData in cData loop
19      null;
20    end loop;
21* end;
for rData in cData loop
ERROR at line 18:
ORA-06550: line 18, column 3:
PLS-00402: alias required in SELECT list of cursor to avoid duplicate column names
ORA-06550: line 18, column 3:
PL/SQL: Statement ignored
$[CHE_TEST@asterix1_impl] r
1 declare
2    cursor cData is
3      with data as (
4        select 1 id, 'test1' val1, 'a' val2 from dual
5        union all
6        select 1 id, '1test' val1, 'b' val2 from dual
7        union all
8        select 2 id, 'test2' val1, 'a' val2 from dual
9        union all
10        select 2 id, '2test' val1, 'b' val2 from dual
11      )
12      select a.id a_id, b.id b_id, a.val1 a_val1, b.val1 b_val1, a.val2 a_val2, b.val2 b_val2
13      from data a, data b
14      where a.id = b.id
15      and a.val2 = 'a'
16      and b.val2 = 'b';
17 begin
18    for rData in cData loop
19      null;
20    end loop;
21* end;
PL/SQL procedure successfully completed.
cheers

How to Select data using same column name from 3 remote database

Hi,
Can anyone help me on how to get data with same column names from 3 remote database and a single alias.
Ex.
SELECT *
a.name, b.status, SUM(b.qty) qantity, MAX(b.date) date_as_of
FROM
*((table1@remotedatabase1, table1@remotedatabase2, table1@remotedatabase3)a,*
*(table1@remotedatabase1, table1@remotedatabase2, table1@remotedatabase3)b)*
WHERE b.dept = 'finance'
AND a.position = 'admin'
AND a.latest = 'Y' AND (b.status <> 'TRM') AND b.qty > 0;
GROUP BY a.name, b.status ;
NOTE: the bold statements is just an example of what I want to do but I always gets an error beacause of ambiguous columns.
Thanks in advnce. :)
Edited by: user12994685 on Jan 4, 2011 9:42 PM

user12994685 wrote:
Can anyone help me on how to get data with same column names from 3 remote database and a single alias.Invalid. This does not make sense and breaks all scope resolution rules. And whether this is in a single database, or uses tables across databases, is irrelevant.
Each object must be uniquely identified. So you cannot do this:
select * from (table1@remotedatabase1, table1@remotedatabase2, table1@remotedatabase3) a3 objects cannot share the same alias. Example:
SQL> select * from (dual, dual) d;
select * from (dual, dual) d
ERROR at line 1:
ORA-00907: missing right parenthesisYou need to combine the objects - using a join or union or similar. So it will need to be done as follows:
SQL> select * from (select * from dual d1, dual d2) d;
select * from (select * from dual d1, dual d2) d
ERROR at line 1:
ORA-00918: column ambiguously definedHowever, we need to have unique column names in a SQL projection - so the join of the tables need to project a unique set of columns. Thus:
SQL> select * from (select d1.dummy as dummy1, d2.dummy as dummy2 from dual d1, dual d2) d;
DUM DUM
X X
SQL> I suggest that you look closely at what scope is and how it applies in the SQL language - and ignore whether the objects referenced are local or remote as it has no impact to fundamentals of scope resolution.

Can I create a view based on two tables that have the same column name?

I have two tables A and B. Each table has 50+ columns.
I want to create a view that includes all the columns in A and all the columns in B. I created a view with a select statement that says
Select A.*, B.*
From A, B
where A.id = B.id
It returns an error because in each table I have a column that keeps track if a record has been changed called Modified_By. That's where it chokes up on I figure. I would like to write the view without explicitly writing each column name from A and B as part of the select statement. The actual select statement works fine and only bombs when trying to turn the select statement into a view.

You will have to type the full column list at least once. You can save a few keystrokes (i.e. alias. on every column) by providing the column names to the CREATE part instead of in the SELECT part. Something like:
SQL> desc t
Name                                      Null?    Type
ID                                                 NUMBER
NAME                                               VARCHAR2(10)
SQL> desc t1
Name                                      Null?    Type
T_ID                                               NUMBER
LOC_ID                                             NUMBER
NAME                                               VARCHAR2(15)
SQL> CREATE VIEW t_v (id, t_name, t_id, loc_id, t1_name) AS
2 SELECT t.*, t1.*
3 FROM t, t1
4 WHERE t.id = t1.t_id;
View created.HTH
John

View the tables with same column name

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