Adding demo.

README.md

@@ -17,6 +17,52 @@ sources such as PostgreSQL, MySQL, SQLite, QL and MongoDB.
 This is the source code repository, see examples and documentation at
 [upper.io/db.v2][1].
 
+## Demo
+
+```go
+package main
+
+import (
+	"log"
+
+	"upper.io/db.v2/postgresql"
+)
+
+var settings = postgresql.ConnectionURL{
+	Host:     "demo.upper.io",
+	Database: "booktown",
+	User:     "demouser",
+	Password: "demop4ss",
+}
+
+type Book struct {
+	ID        int    `db:"id"`
+	Title     string `db:"title"`
+	AuthorID  int    `db:"author_id"`
+	SubjectID int    `db:"subject_id"`
+}
+
+func main() {
+	sess, err := postgresql.Open(settings)
+	if err != nil {
+		log.Fatalf("db.Open(): %q\n", err)
+	}
+	defer sess.Close()
+
+	booksCol := sess.Collection("books")
+
+	var books []Book
+	err = booksCol.Find().All(&books)
+	if err != nil {
+		log.Fatalf("Find(): %q\n", err)
+	}
+
+	for i, book := range books {
+		log.Printf("Book %d: %#v\n", i, book)
+	}
+}
+```
+
 ## License
 
 This project is licensed under the terms of the **MIT License**.

_examples/booktown-books/main.go

@@ -3,7 +3,6 @@ package main
 import (
 	"log"
 
-	"upper.io/db.v2"
 	"upper.io/db.v2/postgresql"
 )
 
@@ -22,11 +21,10 @@ type Book struct {
 }
 
 func main() {
-	sess, err := db.Open("postgresql", settings)
+	sess, err := postgresql.Open(settings)
 	if err != nil {
 		log.Fatalf("db.Open(): %q\n", err)
 	}
-
 	defer sess.Close()
 
 	booksCol := sess.Collection("books")