## 37.48. `sql_features`

 The table `sql_features` contains information about which formal features defined in the SQL standard are supported by PostgreSQL. This is the same information that is presented in [Appendix D](features.html). There you can also find some additional background information.

**Table 37.46. `sql_features` Columns**

|                                                           Column Type<br/><br/> Description                                                          |
|------------------------------------------------------------------------------------------------------------------------------------------------------|
|                                       `feature_id` `character_data`<br/><br/> Identifier string of the feature                                       |
|                                      `feature_name` `character_data`<br/><br/> Descriptive name of the feature                                       |
|             `sub_feature_id` `character_data`<br/><br/> Identifier string of the subfeature, or a zero-length string if not a subfeature             |
|            `sub_feature_name` `character_data`<br/><br/> Descriptive name of the subfeature, or a zero-length string if not a subfeature             |
|            `is_supported` `yes_or_no`<br/><br/>`YES` if the feature is fully supported by the current version of PostgreSQL, `NO` if not             |
|`is_verified_by` `character_data`<br/><br/> Always null, since the PostgreSQL development group does not perform formal testing of feature conformance|
|                          `comments` `character_data`<br/><br/> Possibly a comment about the supported status of the feature                          |

