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Designing databasesThe first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
Designing and Implementing a DatabaseThe HCL OneDB™ Database Design and Implementation Guide provides information to help you design, implement, and manage your HCL® OneDB® databases. It includes data models that illustrate different approaches to database design and shows you how to use structured query language (SQL) to implement and manage your databases.
Managing databases
Grant and limit access to your database
Views
Modify with a view

Modify with a view

You can modify views as if they were tables. Some views can be modified and others not, depending on their SELECT statements. The restrictions are different, depending on whether you use DELETE, UPDATE, or INSERT statements.

You can modify a view if the SELECT statement that defined it did not contain any of the following items:

A join of two or more tables
An aggregate function or the GROUP BY clause
The DISTINCT keyword or its synonym, UNIQUE
The UNION keyword
Calculated or literal values

When a view avoids all these restricted features, each row of the view corresponds to exactly one row of one table. By using INSTEAD OF triggers, you can circumvent these restrictions on the view if the trigger action modifies the base table.

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