Import from RDBMS

NOTE: Starting from OrientDB 2.0 you can use the OrientDB-ETL module to import data from RDBMS. You can use ETL also with 1.7.x by installing it as separate module.

OrientDB supports a subset of SQL, so importing a database created as "Relational" is straightforward. For the sake of simplicity consider your Relational database having just these two tables:

• POST
• COMMENT

Where the relationship is between Post and comment as One-2-Many.

TABLE POST:
+----+----------------+
| id | title          |
+----+----------------+
| 10 | NoSQL movement |
| 20 | New OrientDB   |
+----+----------------+

TABLE COMMENT:
+----+--------+--------------+
| id | postId | text         |
+----+--------+--------------+
|  0 |   10   | First        |
|  1 |   10   | Second       |
| 21 |   10   | Another      |
| 41 |   20   | First again  |
| 82 |   20   | Second Again |
+----+--------+--------------+

• Import using the Document Model (relationships as links)
• Import using the Graph Model (relationships as edges)