Add Usage to README.md

README.md

@@ -26,6 +26,53 @@ See [godoc](https://pkg.go.dev/github.com/tecowl/querybm) for more details.
 go get -u github.com/tecowl/querybm
 ```
 
+## USAGE
+
+```go
+// You can use model generated by sqlc instead of defining your own
+type Author struct {
+	AuthorID int32
+	Name     string
+}
+
+type Condition struct {
+	Name string
+}
+
+func (c *Condition) Build(s *querybm.Statement) {
+	if c.Name != "" {
+		s.Where.Add(Field("name", LikeContains(c.Name)))
+	}
+}
+
+func New(db *sql.DB, condition *Condition) *querybm.Query[Author] {
+	return querybm.New(
+		db,
+		"authors",
+		querybm.NewFields(
+			[]string{"author_id", "name"},
+			func(rows querybm.Scanner, author *models.Author) error {
+				return rows.Scan(&author.AuthorID, &author.Name)
+			},
+		),
+		condition,
+		querybm.NewSortItem("name", false),
+		querybm.NewLimitOffset(100, 0),
+	)
+}
+
+func main() {
+    db, _ := sql.Open("..", "...")
+    defer db.Close()
+
+    condition := &Condition{Name: "John"}
+    q := New(db, condition)
+
+  	cnt, _ := q.Count(ctx)
+    list, _ := q.List(ctx)
+}
+```
+
 ## EXAMPLES
 
 - [Simple Dynamic Query](./tests/mysql/queries/authors/)