Oracle Database Interview Question:

How To Load Data from External Tables to Regular Tables?

Submitted by: Administrator

Once you have your data entered in a text file, and an external table defined to this text file, you can easily load data from this text file to a regular table. The following tutorial exercise shows you how to load data from the text file and the external table defined in the previous exercises to a regular table:

SQL> CREATE TABLE ggl_links (
id NUMBER(4) PRIMARY KEY,
url VARCHAR2(16) NOT NULL,
notes VARCHAR2(16),
counts NUMBER(4),
created DATE DEFAULT (sysdate)
);

SQL> INSERT INTO ggl_links SELECT * FROM ext_ggl_links;
2 rows created.

SQL> SELECT * FROM ggl_links;
<pre> ID URL NOTES COUNTS CREATED
--------- ---------------- ----------- -------- ---------
101 globalguideline.com Session 1 07-MAY-06
110 centerggl.com Session 1 07-MAY-06
1101 www.globalguideline Link #1 88 07-MAY-06
1110 www.globalguideline Link #2 88 07-MAY-06</pre>
Submitted by: Administrator