1 The number of tables is limited to 3, sub-queries are not supported.
2 The number of schema objects on a diagram in the Express edition is limited to 10.
3 CSV format has no restrictions for data export and import, for other formats only first 50 rows are processed. User templates are not supported.
4 It does not support schema export projects, auto-deletion of old schema export files, compression, and schema export files larger than 1MB.
5 The history is saved for the last 3 days only.
* These Oracle versions are not supported in data and schema compare tools.