Finding a column in the database tables

Hi,
I am new in databases and I just started on a project which was already half done.
Sometimes I find it difficult to find out where a column is, i.e. in which table is?
Is there a query to find it out?
For e.g, there are 100 tables. I want to find a column "Description". I want to know in which table the column "Description" is.
Any help would be appreciated.

If you are connect to the schema where you want to search use, user_tab_columns with the following query:
SELECT table_name,column_name FROM user_tab_columns
WHERE column_name like '%STRING%'
ORDER BY 1;
If you want to find out in all the schemas (entire database), use dba_tab_columns.
Jaffar

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Moderator message: FAQ, please search for previous discussions of similar topics.
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Hi,
One approach is:
check lt_mytable is initial.
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[Forum FAQ] How to configure a Data Driven Subscription which get multi-value parameters from one column of a database table?

Introduction
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EmailAddress                             Parameter
Comment
[email protected]              2012,2013,2014               NULL
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Workaround
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From
Expression:[ParameterName]
Operator   :In
Value         :[@ParameterName]
To
Expression:[ParameterName]
Operator   :In
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Applies to
Microsoft SQL Server 2005
Microsoft SQL Server 2008
Microsoft SQL Server 2008 R2
Microsoft SQL Server 2012
Please click to vote if the post helps you. This can be beneficial to other community members reading the thread.

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Try something like this
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2 /
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
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      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-81       1250        500         30
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      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-81       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-81       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-87       3000                    20
      7839 KING       PRESIDENT            17-NOV-81       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-87       1100                    20
      7900 JAMES      CLERK           7698 03-DEC-81        950                    30
      7902 FORD       ANALYST         7566 03-DEC-81       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-82       1300                    10
14 rows selected.
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2 select null, ename, job, mgr, hiredate, sal, comm, deptno
3    from emp_1
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5 /
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SQL> select * from emp_1
2 /
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-80        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-81       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-81       2975                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-81       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-81       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-87       3000                    20
      7839 KING       PRESIDENT            17-NOV-81       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-87       1100                    20
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
      7900 JAMES      CLERK           7698 03-DEC-81        950                    30
      7902 FORD       ANALYST         7566 03-DEC-81       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-82       1300                    10
           SMITH      CLERK           7902 17-DEC-80        800                    20
           ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
           WARD       SALESMAN        7698 22-FEB-81       1250        500         30
           JONES      MANAGER         7839 02-APR-81       2975                    20
           MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
           BLAKE      MANAGER         7839 01-MAY-81       2850                    30
           CLARK      MANAGER         7839 09-JUN-81       2450                    10
           SCOTT      ANALYST         7566 19-APR-87       3000                    20
           KING       PRESIDENT            17-NOV-81       5000                    10
           TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
24 rows selected.
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2 /
MAX(EMPNO)
      7934
SQL> create sequence emp_seq start with 7935
2 /
Sequence created.
SQL> update emp_1 set empno = emp_seq.nextval where empno is null
2 /
10 rows updated.
SQL> select * from emp_1
2 /
     EMPNO ENAME      JOB              MGR HIREDATE         SAL       COMM     DEPTNO
      7369 SMITH      CLERK           7902 17-DEC-80        800                    20
      7499 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
      7521 WARD       SALESMAN        7698 22-FEB-81       1250        500         30
      7566 JONES      MANAGER         7839 02-APR-81       2975                    20
      7654 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
      7698 BLAKE      MANAGER         7839 01-MAY-81       2850                    30
      7782 CLARK      MANAGER         7839 09-JUN-81       2450                    10
      7788 SCOTT      ANALYST         7566 19-APR-87       3000                    20
      7839 KING       PRESIDENT            17-NOV-81       5000                    10
      7844 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
      7876 ADAMS      CLERK           7788 23-MAY-87       1100                    20
      7900 JAMES      CLERK           7698 03-DEC-81        950                    30
      7902 FORD       ANALYST         7566 03-DEC-81       3000                    20
      7934 MILLER     CLERK           7782 23-JAN-82       1300                    10
      7935 SMITH      CLERK           7902 17-DEC-80        800                    20
      7936 ALLEN      SALESMAN        7698 20-FEB-81       1600        300         30
      7937 WARD       SALESMAN        7698 22-FEB-81       1250        500         30
      7938 JONES      MANAGER         7839 02-APR-81       2975                    20
      7939 MARTIN     SALESMAN        7698 28-SEP-81       1250       1400         30
      7940 BLAKE      MANAGER         7839 01-MAY-81       2850                    30
      7941 CLARK      MANAGER         7839 09-JUN-81       2450                    10
      7942 SCOTT      ANALYST         7566 19-APR-87       3000                    20
      7943 KING       PRESIDENT            17-NOV-81       5000                    10
      7944 TURNER     SALESMAN        7698 08-SEP-81       1500          0         30
24 rows selected.

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