> For the complete documentation index, see [llms.txt](https://docs.elimity.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.elimity.com/import-agents-sql/transaction-isolation-levels.md).

# Transaction isolation levels

The SQL import agent will run all of its queries in a single transaction using a configurable isolation level. Refer to the following table for additional information about the supported values:

| Name               | Numeric value | Additional notes                                                                                                                          |
| ------------------ | ------------- | ----------------------------------------------------------------------------------------------------------------------------------------- |
| `DEFAULT`          | `0`           | Uses the server-side default isolation level; the agent always uses this value for connections with IBM Db2 and Oracle Database instances |
| `READ_UNCOMMITTED` | `1`           |                                                                                                                                           |
| `READ_COMMITTED`   | `2`           |                                                                                                                                           |
| `REPEATABLE_READ`  | `4`           |                                                                                                                                           |
| `SNAPSHOT`         | `5`           | The agent uses this value by default for connections with Microsoft SQL Server instances                                                  |
| `SERIALIZABLE`     | `6`           | The agent uses this value by default for connections with MySQL instances                                                                 |


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