diff --git a/example/basic/main.go b/example/basic/main.go
index 38923efe4..72b5dfe57 100644
--- a/example/basic/main.go
+++ b/example/basic/main.go
@@ -79,7 +79,7 @@ func main() {
 }
 
 type User struct {
-	ID     int64
+	ID     int64 `bun:",pk,autoincrement"`
 	Name   string
 	Emails []string
 }
@@ -89,7 +89,7 @@ func (u User) String() string {
 }
 
 type Story struct {
-	ID       int64
+	ID       int64 `bun:",pk,autoincrement"`
 	Title    string
 	AuthorID int64
 	Author   *User `bun:"rel:belongs-to,join:author_id=id"`
diff --git a/example/create-table-index/main.go b/example/create-table-index/main.go
index 6845cbcc1..e4edd166c 100644
--- a/example/create-table-index/main.go
+++ b/example/create-table-index/main.go
@@ -11,7 +11,7 @@ import (
 )
 
 type Book struct {
-	ID         int64
+	ID         int64 `bun:",pk,autoincrement"`
 	Name       string
 	CategoryID int64
 }
diff --git a/example/cursor-pagination/main.go b/example/cursor-pagination/main.go
index c2e9bc303..2d50f20d8 100644
--- a/example/cursor-pagination/main.go
+++ b/example/cursor-pagination/main.go
@@ -58,7 +58,7 @@ func main() {
 }
 
 type Entry struct {
-	ID   int64
+	ID   int64 `bun:",pk,autoincrement"`
 	Text string
 }
 
diff --git a/example/fixture/main.go b/example/fixture/main.go
index b09cb63e9..acccdc205 100644
--- a/example/fixture/main.go
+++ b/example/fixture/main.go
@@ -25,7 +25,7 @@ type User struct {
 }
 
 type Org struct {
-	ID      int64
+	ID      int64 `bun:",pk,autoincrement"`
 	Name    string
 	OwnerID int64
 	Owner   *User `bun:"rel:belongs-to"`
diff --git a/example/model-hooks/main.go b/example/model-hooks/main.go
index aa2be51a3..8ecede28b 100644
--- a/example/model-hooks/main.go
+++ b/example/model-hooks/main.go
@@ -49,7 +49,7 @@ func main() {
 }
 
 type User struct {
-	ID        int64
+	ID        int64 `bun:",pk,autoincrement"`
 	Password  string
 	CreatedAt time.Time `bun:",nullzero"`
 	UpdatedAt time.Time `bun:",nullzero"`
diff --git a/example/multi-tenant/main.go b/example/multi-tenant/main.go
index b8ecfa0d3..aeb8a4212 100644
--- a/example/multi-tenant/main.go
+++ b/example/multi-tenant/main.go
@@ -54,7 +54,7 @@ func selectStories(ctx context.Context, db *bun.DB) ([]*Story, error) {
 }
 
 type Story struct {
-	ID       int64
+	ID       int64 `bun:",pk,autoincrement"`
 	Title    string
 	AuthorID int64
 }
diff --git a/example/opentelemetry/main.go b/example/opentelemetry/main.go
index 3c41cc9f8..be62e0afb 100644
--- a/example/opentelemetry/main.go
+++ b/example/opentelemetry/main.go
@@ -48,7 +48,7 @@ func main() {
 }
 
 type TestModel struct {
-	ID   int64
+	ID   int64 `bun:",pk,autoincrement"`
 	Name string
 }
 
diff --git a/example/pg-faceted-search/main.go b/example/pg-faceted-search/main.go
index 8b58ee926..fea6db73a 100644
--- a/example/pg-faceted-search/main.go
+++ b/example/pg-faceted-search/main.go
@@ -16,7 +16,7 @@ import (
 )
 
 type Book struct {
-	ID   uint64
+	ID   uint64 `bun:",pk,autoincrement"`
 	Name string
 	Tags []string
 }
diff --git a/example/placeholders/main.go b/example/placeholders/main.go
index 822a8d6e5..069817a57 100644
--- a/example/placeholders/main.go
+++ b/example/placeholders/main.go
@@ -12,7 +12,7 @@ import (
 )
 
 type User struct {
-	ID     int64
+	ID     int64 `bun:",pk,autoincrement"`
 	Name   string
 	Emails []string
 }
diff --git a/example/rel-belongs-to/main.go b/example/rel-belongs-to/main.go
index f3d36ebfd..ff1227739 100644
--- a/example/rel-belongs-to/main.go
+++ b/example/rel-belongs-to/main.go
@@ -12,13 +12,13 @@ import (
 )
 
 type Profile struct {
-	ID   int64 `bun:",pk"`
+	ID   int64 `bun:",pk,autoincrement"`
 	Lang string
 }
 
 // User has one profile.
 type User struct {
-	ID        int64 `bun:",pk"`
+	ID        int64 `bun:",pk,autoincrement"`
 	Name      string
 	ProfileID int64
 	Profile   *Profile `bun:"rel:belongs-to,join=profile_id=id"`
diff --git a/example/rel-has-many-polymorphic/main.go b/example/rel-has-many-polymorphic/main.go
index 295577117..3478994d3 100644
--- a/example/rel-has-many-polymorphic/main.go
+++ b/example/rel-has-many-polymorphic/main.go
@@ -20,14 +20,14 @@ type Comment struct {
 }
 
 type Article struct {
-	ID   int64
+	ID   int64 `bun:",pk,autoincrement"`
 	Name string
 
 	Comments []Comment `bun:"rel:has-many,join:id=trackable_id,join:type=trackable_type,polymorphic"`
 }
 
 type Post struct {
-	ID   int64
+	ID   int64 `bun:",pk,autoincrement"`
 	Name string
 
 	Comments []Comment `bun:"rel:has-many,join:id=trackable_id,join:type=trackable_type,polymorphic"`
diff --git a/example/rel-has-many/main.go b/example/rel-has-many/main.go
index 48339f183..ab258f365 100644
--- a/example/rel-has-many/main.go
+++ b/example/rel-has-many/main.go
@@ -12,7 +12,7 @@ import (
 )
 
 type Profile struct {
-	ID     int64 `bun:",pk"`
+	ID     int64 `bun:",pk,autoincrement"`
 	Lang   string
 	Active bool
 	UserID int64
@@ -20,7 +20,7 @@ type Profile struct {
 
 // User has many profiles.
 type User struct {
-	ID       int64 `bun:",pk"`
+	ID       int64 `bun:",pk,autoincrement"`
 	Name     string
 	Profiles []*Profile `bun:"rel:has-many,join:id=user_id"`
 }
diff --git a/example/rel-has-one/main.go b/example/rel-has-one/main.go
index 38aa721ff..7e8d4c6ff 100644
--- a/example/rel-has-one/main.go
+++ b/example/rel-has-one/main.go
@@ -13,13 +13,13 @@ import (
 
 // Profile belongs to User.
 type Profile struct {
-	ID     int64 `bun:",pk"`
+	ID     int64 `bun:",pk,autoincrement"`
 	Lang   string
 	UserID int64
 }
 
 type User struct {
-	ID      int64 `bun:",pk"`
+	ID      int64 `bun:",pk,autoincrement"`
 	Name    string
 	Profile *Profile `bun:"rel:has-one,join:id=user_id"`
 }
diff --git a/example/rel-many-to-many-self/main.go b/example/rel-many-to-many-self/main.go
index 3f0c8a4c5..e9c057151 100644
--- a/example/rel-many-to-many-self/main.go
+++ b/example/rel-many-to-many-self/main.go
@@ -12,7 +12,7 @@ import (
 )
 
 type Item struct {
-	ID       int64  `bun:",pk"`
+	ID       int64  `bun:",pk,autoincrement"`
 	Children []Item `bun:"m2m:item_to_items,join:Item=Child"`
 }
 
diff --git a/example/rel-many-to-many/main.go b/example/rel-many-to-many/main.go
index 8c1101e9d..90cea02bc 100644
--- a/example/rel-many-to-many/main.go
+++ b/example/rel-many-to-many/main.go
@@ -12,13 +12,13 @@ import (
 )
 
 type Order struct {
-	ID int64 `bun:",pk"`
+	ID int64 `bun:",pk,autoincrement"`
 	// Order and Item in join:Order=Item are fields in OrderToItem model
 	Items []Item `bun:"m2m:order_to_items,join:Order=Item"`
 }
 
 type Item struct {
-	ID int64 `bun:",pk"`
+	ID int64 `bun:",pk,autoincrement"`
 	// Order and Item in join:Order=Item are fields in OrderToItem model
 	Orders []Order `bun:"m2m:order_to_items,join:Item=Order"`
 }
diff --git a/example/tx-composition/main.go b/example/tx-composition/main.go
index b9048180e..5edf3c7dc 100644
--- a/example/tx-composition/main.go
+++ b/example/tx-composition/main.go
@@ -57,7 +57,7 @@ func insertUserAndProfile(ctx context.Context, db bun.IDB) error {
 }
 
 type User struct {
-	ID   int64
+	ID   int64 `bun:",pk,autoincrement"`
 	Name string
 }
 
@@ -67,7 +67,7 @@ func InsertUser(ctx context.Context, db bun.IDB, user *User) error {
 }
 
 type Profile struct {
-	ID     int64
+	ID     int64 `bun:",pk,autoincrement"`
 	UserID int64
 	Email  string
 }