The following table indicates the conformance level of each ODBC descriptor header field, where this is well-defined.
| Function | Conformance level |
| SQL_DESC_ALLOC_TYPE | Core |
| SQL_DESC_ARRAY_SIZE | Core |
| SQL_DESC_ARRAY_STATUS_PTR | Core (for APD, IPR, and IRD); Level 1 (for ARD) |
| SQL_DESC_BIND_OFFSET_PTR | Core |
| SQL_DESC_BIND_TYPE | Core |
| SQL_DESC_COUNT | Core |
| SQL_DESC_ROWS_PROCESSED_PTR | Core |
The following table indicates the conformance level of each ODBC descriptor record field, where this is well-defined.
| Function | Conformance level |
| SQL_DESC_AUTO_UNIQUE_VALUE | Level 2 |
| SQL_DESC_BASE_COLUMN_NAME | Core |
| SQL_DESC_BASE_TABLE_NAME | Level 1 |
| SQL_DESC_CASE_SENSITIVE | Core |
| SQL_DESC_CATALOG_NAME | Level 2 |
| SQL_DESC_CONCISE_TYPE | Core |
| SQL_DESC_DATA_PTR | Core |
| SQL_DESC_DATETIME_INTERVAL_ CODE |
Core [1] |
| SQL_DESC_DATETIME_INTERVAL_ PRECISION |
Core [1] |
| SQL_DESC_DISPLAY_SIZE | Core |
| SQL_DESC_FIXED_PREC_SCALE | Core |
| SQL_DESC_INDICATOR_PTR | Core |
| SQL_DESC_LABEL | Level 2 |
| SQL_DESC_LENGTH | Core |
| SQL_DESC_LITERAL_PREFIX | Core |
| SQL_DESC_LITERAL_SUFFIX | Core |
| SQL_DESC_LOCAL_TYPE_NAME | Core |
| SQL_DESC_NAME | Core |
| SQL_DESC_NULLABLE | Core |
| SQL_DESC_OCTET_LENGTH | Core |
| SQL_DESC_OCTET_LENGTH_PTR | Core |
| SQL_DESC_PARAMETER_TYPE | Core/Level 2 [2] |
| SQL_DESC_PRECISION | Core |
| SQL_DESC_ROWVER | Level 1 |
| SQL_DESC_SCALE | Core |
| SQL_DESC_SCHEMA_NAME | Level 1 |
| SQL_DESC_SEARCHABLE | Core |
| SQL_DESC_TABLE_NAME | Level 1 |
| SQL_DESC_TYPE | Core |
| SQL_DESC_TYPE_NAME | Core |
| SQL_DESC_UNNAMED | Core |
| SQL_DESC_UNSIGNED | Core |
| SQL_DESC_UPDATABLE | Core |
[1]Support for these record fields is required only if the driver supports the applicable data types.
[2]For Core-level conformance, the driver must support SQL_PARAM_INPUT. For Level 2 interface conformance, the driver must also support SQL_PARAM_INPUT_OUTPUT and SQL_PARAM_OUTPUT.