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diff --git a/doc/database/db_group_member.md b/doc/database/db_group_member.md
index a4ecfdf7db..a544f3b0ec 100644
--- a/doc/database/db_group_member.md
+++ b/doc/database/db_group_member.md
@@ -1,11 +1,32 @@
 Table group_member
 ===========
+
 privacy groups, member info
 
-| Field | Description | Type | Null | Key | Default | Extra |
-| ----- | ----------- | ---- | ---- | --- | ------- | ----- |
-| id | sequential ID | int unsigned | YES | PRI |  | auto_increment |    
-| gid | groups.id of the associated group | int unsigned | YES |  | 0 |  |    
-| contact-id | contact.id of the member assigned to the associated group | int unsigned | YES |  | 0 |  |    
+Fields
+------
+
+| Field      | Description                                               | Type         | Null | Key | Default | Extra          |
+| ---------- | --------------------------------------------------------- | ------------ | ---- | --- | ------- | -------------- |
+| id         | sequential ID                                             | int unsigned | NO   | PRI | NULL    | auto_increment |
+| gid        | groups.id of the associated group                         | int unsigned | NO   |     | 0       |                |
+| contact-id | contact.id of the member assigned to the associated group | int unsigned | NO   |     | 0       |                |
+
+Indexes
+------------
+
+| Name          | Fields                  |
+| ------------- | ----------------------- |
+| PRIMARY       | id                      |
+| contactid     | contact-id              |
+| gid_contactid | UNIQUE, gid, contact-id |
+
+Foreign Keys
+------------
+
+| Field | Target Table | Target Field |
+|-------|--------------|--------------|
+| gid | [group](help/database/db_group) | id |
+| contact-id | [contact](help/database/db_contact) | id |
 
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