Considerations

Listed below are some points to consider while working with Virtual Databases:

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During creation of virtual database, the adapter name used is "COMPOSITE_DATABASE".

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The DATASOURCE_TYPE of a virtual database is "VirtualRelational".

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Use the "CREATE VIRTUAL DATABASE IF NOT EXISTS" syntax to avoid any duplicate error messages.

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For annotation QUOTED_STRING, an explicit NULL keyword or a quoted string 'NULL' can be specified. This is to allow annotation to be unset or set to null explicitly.

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The virtual databases are created in the "/services/databases" area.

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Altering a virtual database can alter the annotation or rename the virtual database. Use the "RENAME AS" syntax to rename a published database.

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IF EXISTS" syntax in DROP to avoid any error messages, in case the resource is not found.