Sunday, April 13, 2008

Select Column Name from a Table

We know with desc table_name we can see the different attribute of the table. Someone asked me how I can select column_name from a table. It can be done through query from various tables.

DBA_TAB_COL_STATISTICS,DBA_TAB_COLUMNS,DBA_TAB_COLS, DBA_COL_COMMENTS provide column to help us to query.

Like with an example I will show this, From cols I issued query to achieve my result.


1)SQL> create table test_table( a number, b varchar2(10),c clob);
Table created.

2)select column_name,data_type from cols where Table_name='TEST_TABLE'

COLUMN_NAME DATA_TYPE
------------------------------ --------------------
A NUMBER
B VARCHAR2
C CLOB

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