Oracle SQL Developer Data Modeler for Database Design Mastery by Helskyaho Heli

Author:Helskyaho, Heli
Language: eng
Format: epub
Publisher: McGraw-Hill Education
Published: 2015-05-18T04:00:00+00:00

NOTE

If you change a logical property of a column in the relational model (data type, length, and so on), you can see the change in the physical model immediately.

On the Column Not Null Constraints tab, you can change the parameters for a possible Not Null constraint for this column or create a new one if there is no constraint. First you define the name for the constraint: Initially (Immediate, Deferred), Deferrable (yes/no), Enable (yes/no), Validate (yes/no). Then you select a table name from a list as an exceptions table. On the Column Check Options tab, you can change the parameters for a possible check constraint for this column: Initially (Immediate, Deferred), Deferrable (yes/no), Enable (yes/no), or Validate (yes/no); then select a table name from the list as an exceptions table. If the column is an auto-increment column, you can define the parameters on the Auto Increment tab. Data Modeler also supports the native identity column in Oracle 12c.

You can also specify special parameters for XML types, nested table collections, and Varray collections on these tabs: XMLType Options, XMLType Storage, Varray, and Nested Table. You can see and edit the Comments and Comments In RDBMS fields on the Comments tab, but remember that if you change them in the physical model, then changes in the logical model (for these comments) will not be shown in the physical model anymore.

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