The following table describes conversions to and from types modified by DBTYPE_VECTOR. Type indicators X and Y are unmodified.
| Source type indicator | Target type indicator | Notes |
| X | Y | DBTYPE_VECTOR | It is provider-specific whether this is supported. |
| X | DBTYPE_VECTOR | Y | It is provider-specific whether this is supported. |
| X | DBTYPE_VECTOR | Y | DBTYPE_VECTOR | If the provider supports a conversion from X to Y, and the provider supports both X | DBTYPE_VECTOR and Y | DBTYPE_VECTOR, it must support this conversion. Any such conversions must follow the rules in this appendix. |
| X | DBTYPE_ARRAY | Y | DBTYPE_VECTOR | Not supported. |
| X | DBTYPE_VECTOR | Y | DBTYPE_ARRAY | Not supported. |