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diff --git a/doc/database/db_group.md b/doc/database/db_group.md
index f27b9a75f7..1892de3e40 100644
--- a/doc/database/db_group.md
+++ b/doc/database/db_group.md
@@ -1,12 +1,32 @@
 Table group
 ===========
 
-| Field   | Description                                | Type             | Null | Key | Default | Extra           |
-| ------- | ------------------------------------------ | ---------------- | ---- | --- | ------- | --------------- |
-| id      | sequential ID                              | int(10) unsigned | NO   | PRI | NULL    | auto_increment  |
-| uid     | user.id owning this data                   | int(10) unsigned | NO   | MUL | 0       |                 |
-| visible | 1 indicates the member list is not private | tinyint(1)       | NO   |     | 0       |                 |
-| deleted | 1 indicates the group has been deleted     | tinyint(1)       | NO   |     | 0       |                 |
-| name    | human readable name of group               | varchar(255)     | NO   |     |         |                 |
+privacy groups, group info
+
+Fields
+------
+
+| Field   | Description                                | Type               | Null | Key | Default | Extra          |
+| ------- | ------------------------------------------ | ------------------ | ---- | --- | ------- | -------------- |
+| id      | sequential ID                              | int unsigned       | NO   | PRI | NULL    | auto_increment |
+| uid     | Owner User id                              | mediumint unsigned | NO   |     | 0       |                |
+| visible | 1 indicates the member list is not private | boolean            | NO   |     | 0       |                |
+| deleted | 1 indicates the group has been deleted     | boolean            | NO   |     | 0       |                |
+| name    | human readable name of group               | varchar(255)       | NO   |     |         |                |
+
+Indexes
+------------
+
+| Name    | Fields |
+| ------- | ------ |
+| PRIMARY | id     |
+| uid     | uid    |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| uid | [user](help/database/db_user) | uid |
 
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