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Altering tables - PowerPoint PPT Presentation

Creating and Managing Tables

Creating and Managing Tables. Objectives. After completing this lesson, you should be able to do the following: Describe the main database objects Create tables Describe the datatypes that can be used when specifying column definition Alter table definitions

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Altering Tables

Altering Tables. Adding a Column: Syntax. ALTER TABLE table ADD ( column datatype , column datatype , ...);. Adding a Column: Example. ALTER TABLE s_region ADD (comments VARCHAR2(255)); Table altered. Modifying a Column: Syntax. ALTER TABLE table MODIFY ( column datatype ,

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Altering tables - PowerPoint PPT Presentation

Creating and Managing Tables

Altering Tables