How to pass column name in slect statement in query

hi,
i want to make a report where in query select statement using variable as a column name. but its not working plz guide me how can i do this.
i have created a function which return column name through variable & that variable i want to to use in select statement
select :m1 from table1;
regards

Hi,
Create a user parameter (say P_field), and assign a valid field name as initial value (say NAME), And In the Query, write
SELECT CODE, &P_field FN_FIELD FROM <table_name> WHERE <condition>And in the BEFORE PARAMETER FORM Trigger under the Report Triggers, write,
function BeforePForm return boolean is
begin
:P_field := <your_function_call>;
return (TRUE);
end;And use that FN_FIELD field in the report.
Hope this will clear your issue.
Regards,
Manu.

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How to pass column name as a   values from one page to another

hi
i have created a report(pivot) from a table
SQL> SELECT * FROM T;
C1 C2          C3 D                SEQ
A   AA           2                    1
A   AB           3                    2
A   AC           2                    3
B   AB           5                    4
B   AC           6                    5
SQL> SELECT C1
2 ,NVL(MAX(CASE WHEN C2='AA' THEN C3 END),'') AA
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5 ,SUM(C3) FROM T GROUP BY C1;
C1          AA         AB         AC    SUM(C3)
A            2          3          2          7
B                       5          6         11
SQL>
my requirement in Apex is like this(reverse)
eg-
when i click on cell values '2' then,it should return
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{quote}how to pass column name as a values from one page to another
for example i have to pass 'c2' as a value to next page{quote}for report pivot you can reffer below link
Report
Amu

thanks for your reply
i 'm doing what exactly you mention here .
my problem here is
i have 15 columns
i am executing a query based on the values of the column(column name) in the target page
1)here i am passing(all) the column values to the next page-but i want to pass only one column values(column name)
when i click on any cell of that column
OR
2)i can pass all column name to target page -there(in the target page) i can filter out
i think option 1 would good if you filter out the unwanted columns
Regards
Amul

How to pass column name at run time in function.

how to pass column name at run time in function as parameter.
thank in advance
pramod patel

Hello,
Using dynamic sql you can pass column name to function. well I am not getting what you really want to do ? Please write in more detail. By the way I am providing one example here. see it uses dynamic sql.
Create or replace function fun_updtest (p_columnname_varchar2 in varchar2,
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return number is
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begin
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return 0;
commit;
end;
call to this function can be like this..
declare
v_number number;
begin
v_number := fun_updtest('SAL',5000);
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Adinath Kamode

Passing column name dianamically in an insert query

i have a procedure hwre i used an inser query.eg
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You don't necessarily need to use dynamic SQL;
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p_c number default null
) is
begin
insert into t
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p_a number default null,
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begin
insert into t
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exec p(4, null, 6);
PL/SQL procedure successfully completed
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PL/SQL procedure successfully completed
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How to get column names for a specific view in the scheme?

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Execute immediate with using clause to pass column name dynamically

Hai,
Is there any way using execute immeidate to pass the column name dynamically. I used to pass the column value as dynamic with the help of "Using clause" . But if i use to pass column name, it is giving numberic error at run time. Eg,. for testing has been given below.
1. Column value as dynamic, which is working correctly.
create or replace function testexeimm (acctnum char)
return number as
acctbal number;
begin
execute immediate 'select balance from acct_master where acct_no=:a' into acctbal using acctnum;
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create or replace function testexeimm (colnam char)
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begin
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acctbal number;
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http://oracleitalia.wordpress.com

Pass column-name as a parameter to reports

Hello,
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repid REPORT_OBJECT;
v_rep VARCHAR2(100);
rep_status VARCHAR2(20);
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Hi,
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select .. from .. where ... &p_order.
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if :p_param is null
then
:p_order:= null;
else
:p_order:= 'order by '||:p_param;
end if;
But have a look, that p_param can only get correct values.
Rainer

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Hello Mithun
The column texts are taken from the field descriptions of the data elements used in your z-table. A "+" sign usually indicates that none of the field descriptions of the data element has been maintained.
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          David wrote:
          > Hi, Exports,
          >
          > I am trying to post data from applet to another application which is
          > protected by network password.
          > How to pass user name and password when I use openConnection method? In java
          > doc, this method looks like do not accept these two parameters.
          >
          > Thanks
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          > dos.writeBytes("Referer: http://127.0.0.1/XML/index.cfm\r\n");
          > dos.writeBytes("Content-Type:
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          > dos.writeBytes("Host: "+host+":"+port+"\r\n");
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          > dos.close();
          >
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How to rename column name of table?

Hello...
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The following should work in 9i release 2 and above.
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Hello,
Using dynamic sql you can pass column name to function. well I am not getting what you really want to do ? Please write in more detail. By the way I am providing one example here. see it uses dynamic sql.
Create or replace function fun_updtest (p_columnname_varchar2 in varchar2,
p_value_number in number)
return number is
v_stmt varchar2(500);
begin
v_stmt := 'update emp
set '||p_columnname_varchar2||' = '||to_char(p_value_number)||'
where empno = 7369';
execute immediate v_stmt;
return 0;
commit;
end;
call to this function can be like this..
declare
v_number number;
begin
v_number := fun_updtest('SAL',5000);
end;
Adinath Kamode

How to use column name as variable in select statement

hi,
i want to make a sql query where in select statement using variable as a column name. but its not working plz guide me how can i do this.
select :m1 from table1;
regards

Hi,
Is this what you want..
SQL> select &m1 from dept;
Enter value for m1: deptno
old   1: select &m1 from dept
new   1: select deptno from dept
    DEPTNO
        10
        20
        30
        40
SQL> select &m1 from dept;
Enter value for m1: dname
old   1: select &m1 from dept
new   1: select dname from dept
DNAME
ACCOUNTING
RESEARCH
SALES
OPERATIONS
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new   1: select loc from dept
LOC
NEW YORK
DALLAS
CHICAGO
BOSTON
SQL> select &&m1 from dept;
old   1: select &&m1 from dept
new   1: select loc from dept
LOC
NEW YORK
DALLAS
CHICAGO
BOSTONIf you use single '&' then each time you fire the query, It will ask for the new value..
But if you will use double '&&' the value of m1 will be persistent across the session..
Twinkle

Passing column names in as a variable

I know in SQL server there is a way you can pass a variable in to the procedure and put that variable as a column name, Oracle doesn't seem to pick the variable up as a column name. Can anyone show me how with a simple select statement

bgulcu wrote:
I'm having a similar problem. I didn't want to open up another thread since it's related.
Problem:
I have 107 columns on a table. The number of columns increases almost every month.
I have an array of columns, which I have gathered from the db. I need to pivot the whole table, but due to indefinite number of columns, it had to be dynamic sql.
Premature Solution:
Right now, the solution that we have runs through the array of columns and uses dynamic sql to query for every single cell to get the value. Considering that we have 1000+ rows on this table, in order to do the transformation, we send 107000+ queries which is just ugly. It works, but I don't feel comfortable about it.
Solution:
Since we are able to get a single row of 107 columns, why don't we gather the whole row, and get the information out from it instead of tiring up the server? The indefinite number of columns is a problem, but we have the whole list in an array, lets say feature_array. So what I want to do is to get the date from the row, ie myRow.feature_array(1), myRow.feature_array(2), ..., myRow.feature_array(i).
I just learned that it's not possible to do it (from this thread).You just misunderstood the contents of this thread. What we said is that you can't do such things with static SQL, so you need to use dynamic sql.
What has also been told was that using dynamic sql for such a purpose is just the result of a bad design. Use a relational table as a bi-dimensional array is not right, it is possible but it's not right for the simple reason that you need a procedural language to process the dynamic SQL that is needed to retrieve data.
Probably on database programming there's only a rule of thumb and it says: "Maximize SQL minimize PL/SQL" (or any procedural language like java). The only exceptions to keep code in procedural language must depend on a complexity reduction determined by its use. In your case there is no complexity reduction determined by the use of a procedural language.
In the thread on this link(Schema integrity I discussed about how to implement a solution you can use as alternative for submitting queries with variable column names.
If you introduce parameter management in your model probably you could have your problem solved with the use of only a single SQL statement. And that may be a good designed model.
Bye Alessandro

How to pass table name as argument to cursor

please help me how to solve this.
SQL> select c1 from test ;
C1
1
7
18
4
10
28
30
I'm able to execute this.
SQL> get b
1 set serveroutput on size 2000
2 declare
3 cursor c1 is
4 select c1 from test ;
5 begin
6 for rec in c1
7 loop
8 dbms_output.put_line(rec.c1);
9 end loop;
10* end;
SQL> sta b
1
7
18
4
10
28
30
When I change the above cursor to accept the parameter it is not working.
SQL> get c
1 set serveroutput on size 2000
2 declare
3 cursor c1(p_table varchar2) is
4 select c1 from p_table ;
5 begin
6 for rec in c1('test')
7 loop
8 dbms_output.put_line(rec.c1);
9 end loop;
10* end;
ERROR at line 3:
ORA-06550: line 3, column 18:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 3, column 3:
PL/SQL: SQL Statement ignored
ORA-06550: line 7, column 25:
PLS-00364: loop index variable 'REC' use is invalid
ORA-06550: line 7, column 4:
PL/SQL: Statement ignored

You cannot use a (bind) variable in SQL for an object name (i.e. a table name, column name, etc).
Why?
The SQL engine needs to parse the SQL. Part of the parse is to resolve the scope to determine what objects are being reference. It needs to check that the column names referred to is indeed in that object. Etc.
Then these objects are used to determine the best execution path to run the SQL. What indexes do the objects have? Is the object a partitioned table and the partition criteria used in the predicate? Etc.
How can the SQL engine perform any of these when you pass it a table name that is a parameter?
The name of an object (such as the table being selected from) must be explicitly stated in a SQL statement. It cannot be variable.

How to pass column name in slect statement in query

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