Generating table with large number of columns (256)

Hi,
I don't know if this is right place for posting this:
for data mining purposes I need a table which column names needs to be size N, where N is 2, 3 or 4. Column name is build upon alphabet of nucleotids A,C,T,G and all variations with repetition. For N=2, columns are: AA, AC, AT, AG, CA, CC, CT, CG, TA, TC, TT, TG, GA, GC, GT, GG (4^2 = 16). For N=3, 4^3 = 64, and for N=4 4^4 = 256.
Primary key in table is array of nucleotids, and values in previously mentioned columns for each nucleotid array are 1 or 0, based on that if such nucleotid of size N exists in that chain or not.
My questions are:
1) is there any tool (in Oracle Data Miner or whatever) which can generate such table from array of nucleotids (one array of nucleotids is ordinary string)?
2) It's not a problem to generate this table myself but is it "normal" to have database table with 257 columns (when N = 4)?
I hope that my problem is clear (because of my English).
Thanks in advance.
Regards.

Without knowing the reason for doing so, I would guess, this kind of design is quite poor.
How are you planning to specify your queries? (I do know dynamic SQL would be a possibility ...).
Another point of view:
What if someone decides to have column names built using 5 nucleotids? This would exceed the maximum number of columns of a table which currently (10g, 11g) is 1000?

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How to create a table with varied number of columns?

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Why did you create a new thread for this?
How to create a table with varied number of columns?

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.
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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
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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      )
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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

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user2602680 wrote:
Please update your forum profile with a real handle instead of "user2602680".
I have a report with single row having large number of columns . I have to use a scroll bar to see all the columns.
Is it possible to design report in below format(half columns on one side of page, half on other side of page :
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Data
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Data
Column8
Data
Column18
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Data
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Data
Column10
Data
Column20
Data
I am using Apex 4.2.3 version on oracle 11g xe.
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FIELD-SYMBOLS: <dynline> TYPE ANY.
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DATA: ls TYPE lvc_s_fcat.
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tabname = iname
TABLES
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PERFORM mydyntable USING lt.
BREAK-POINT.
INDEPENDENT FORM
FORM mydyntable USING lt TYPE lvc_t_fcat .
Create Dyn Table From FC
FIELD-SYMBOLS: <fs_data> TYPE REF TO data.
FIELD-SYMBOLS: <fs_1>.
FIELD-SYMBOLS: <fs_2> TYPE ANY TABLE.
DATA: lt_data TYPE REF TO data.
ASSIGN lt_data TO <fs_data>.
CALL METHOD cl_alv_table_create=>create_dynamic_table
EXPORTING
it_fieldcatalog = lt
IMPORTING
ep_table = <fs_data>
EXCEPTIONS
generate_subpool_dir_full = 1
OTHERS = 2.
IF sy-subrc <> 0.
ENDIF.
Assign Dyn Table To Field Sumbol
ASSIGN <fs_data>->* TO <fs_1>.
ASSIGN <fs_1> TO <fs_2>.
ASSIGN <fs_1> TO <dyntable>.
ENDFORM. "MYDYNTABLE
regards,
amit m.

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Specific answer is here
http://winrichman.blogspot.com/2008/09/dynamic-column.html
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http://winrichman.blogspot.com/search/label/Cross-tab
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Hi daniel,
1. There is an INDEPENDENT FORM
whose inputs are FIELD LIST
and from those, it consructs dynamic table.
2. Here is the program.
the dynamic table name will be
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3. U can use this program (FORM in this program)
to generate any kind of internal table
by specifying some inputs (ie. field list)
4.
REPORT abc.
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FIELD-SYMBOLS: <dyntable> TYPE ANY TABLE.
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PARAMETERS : infty(4) TYPE c OBLIGATORY.
DATA : iname LIKE dd02l-tabname.
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GET INFO
CONCATENATE 'P' infty INTO iname.
DATA : ddfields LIKE ddfield OCCURS 0 WITH HEADER LINE.
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EXPORTING
tabname = iname
TABLES
ddfields = ddfields.
CONSTRUCT FIELD LIST
LOOP AT ddfields.
ls-fieldname = ddfields-fieldname.
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ENDLOOP.
PERFORM
PERFORM mydyntable USING lt.
BREAK-POINT.
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EXCEPTIONS
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ASSIGN <fs_data>->* TO <fs_1>.
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regards,
amit m.

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Message was edited by:
        Florian Something

Hi Florian,
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Best Regards,
Marcel

How create table with variable number of columns?

I am creating table data in Java. Number of columns is variable. How I can write <table> in UIX.
Here is code of one of my unsuccessful attempt:
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Generating table with large number of columns (256)

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