Categories:
.NET (357)
C (330)
C++ (183)
CSS (84)
DBA (2)
General (7)
HTML (4)
Java (574)
JavaScript (106)
JSP (66)
Oracle (114)
Perl (46)
Perl (1)
PHP (1)
PL/SQL (1)
RSS (51)
Software QA (13)
SQL Server (1)
Windows (1)
XHTML (173)
Other Resources:
How To Add a New Column to an Existing Table
How To Add a New Column to an Existing Table? - Oracle DBA FAQ - Managing Oracle Database Tables
✍: FYIcenter.com
If you have an existing table with existing data rows, and want to add a new column to that table, you can use the ALTER TABLE ... ADD statement to do this. Here is an example script:
SQL> connect HR/fyicenter Connected. SQL> CREATE TABLE emp_dept_110 2 AS SELECT * FROM employees WHERE department_id=110; Table created. SQL> ALTER TABLE emp_dept_110 ADD (vacation NUMBER); Table altered. SQL> SELECT first_name, last_name, vacation 2 FROM emp_dept_110; FIRST_NAME LAST_NAME VACATION -------------------- ------------------------- ---------- Shelley Higgins William Gietz
This SQL script added a new column called "vacation" to the "emp_dept_110" table. NULL values were added to this column on all existing data rows.
2007-05-03, 4873👍, 0💬
Popular Posts:
Write down the equivalent pointer expression for referring the same element a[i][j][k][l]? a[i] == *...
How Many Types of Tables Supported by Oracle? - Oracle DBA FAQ - Managing Oracle Database Tables Ora...
How can I show HTML examples without them being interpreted as part of my document? Within the HTML ...
What is Windows DNA architecture? Note :- If you have worked with classic ASP this question can come...
What’s the difference between Unit testing, Assembly testing and Regression testing? Unit testing is...