Difference between revisions of "Table Creation and Management"
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command DESCRIBE. | command DESCRIBE. | ||
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| | |colspan="2"|Modifying Tables | ||
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;Create a new table with the CREATE TABLE command | ;Create a new table with the CREATE TABLE command | ||
Revision as of 22:47, 29 September 2017
- Identify the table name and structure
- Commands used to create or modify database tables are called data definition language(DDL commands
- A Database Object is a defined self contained structure also called database tables
| Creating Tables | Description |
|---|---|
| CREATE TABLE | Creates a new table in the database. The user names the columns and identifies the type of data to be stored. To view a table, use the SQL*PLUS
command DESCRIBE. |
| Modifying Tables | |
- Create a new table with the CREATE TABLE command
- Use a subquery to create a new table
- Add a column to an existing table
- Modify the definition of a column in an existing table
- Delete a column from an existing table
- Mark a column as unused and then delete it later
- Rename a table
- Truncate a table
- Drop a table