Select the column in a table that is defined in the select previous in the statement

Hello

I want to write a procedure that selects all the data in a table has then records them in the text file. I tested on table hr.countries.

My code is like this:

echo off newpage 0 space 0 pagesize 0 feed head off trimspool check out serveroutput on the value

coil countries.txt

define dtable = COUNTRY;

declare

col_num NUMBER;

no_lig NUMBER;

line VARCHAR2 (100);

Col VARCHAR2 (100);

Start

Select count (COLUMN_ID) in the col_num USER_TAB_COLUMNS WHERE table_name = '& dtable';

Select count (*) in no_lig of & dtable;

because me in 1.row_num

loop

1.col_num j

loop

Select column_name from col FROM USER_TAB_COLUMNS WHERE table_name = '& dtable' and column_id = j;

Select the pass in the row (select col, rownum: nurse of (select col from & dtable)) where rn = i;

IF (j! = col_num) THEN

DBMS_OUTPUT. PUT(Row ||) ', ');

ON THE OTHER

DBMS_OUTPUT. PUT (Row);

END IF;

end loop;

DBMS_OUTPUT. NEW_LINE;

end loop;

end;

/

spool off

I have had no error, but the result is like this:

COUNTRY_ID, COUNTRY_NAME, REGION_ID

COUNTRY_ID, COUNTRY_NAME, REGION_ID

COUNTRY_ID, COUNTRY_NAME, REGION_ID

.. and so on for the whole table.

I want to have results with data not only the names of columns. No idea what is the problem? I thought that select col online would do the thing, but the line is identical to the col variable...

Thank you

Honza

Set serveroutput on;

define dtable = COUNTRY;

declare

col_num NUMBER;

no_lig NUMBER;

line VARCHAR2 (100);

Col VARCHAR2 (100);

Start

Select count (COLUMN_ID) in the col_num USER_TAB_COLUMNS WHERE table_name = '& dtable;

Select count (*) in the no_lig argument of &dtable;

because me in 1.row_num

loop

1.col_num j

loop

Select column_name from col FROM USER_TAB_COLUMNS WHERE table_name = '& dtable' and column_id = j;

run immediately 'select'. Col | "from (select ' |) Col |', rownum: nurse from (select ' |) Col |' of & dtable)) where rn =' | I have

Online;

IF (j! = col_num) THEN

DBMS_OUTPUT. PUT(Row ||) ', ');

ON THE OTHER

DBMS_OUTPUT. PUT (Row);

END IF;

end loop;

DBMS_OUTPUT. NEW_LINE;

end loop;

end;

/

Output

anonymous block filled

AR, Argentina, 2

To, Australia, 3

BEING, Belgium, 1

BR, Brazil, 2

CA, Canada, 2

CH, Switzerland, 1

CN, China, 3

OF (Germany), 1

DK, Denmark, 1

For example, Egypt, 4

FR, France, 1

HE, Israel, 4

IN, India, 3

IT, Italy, 1

JP, Japan, 3

KW, Kuwait, 4

ML, Malaysia, 3

MX, Mexico, 2

NG, Nigeria, 4

NL, Netherlands, 1

SG, Singapore, 3

UK, United Kingdom, 1

WE, United States of America, 2

ZM Zambia, 4

ZW, Zimbabwe, 4

Tags: Database

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