diff --git a/main.go b/main.go
index 1ebe104f..53dcc807 100644
--- a/main.go
+++ b/main.go
@@ -56,9 +56,9 @@ func (s *DB) Order(value interface{}) (orm *Orm) {
 	return
 }
 
-func (s *DB) Select(querystring string) (orm *Orm) {
+func (s *DB) Select(value interface{}) (orm *Orm) {
 	orm = s.buildORM()
-	orm.Select(querystring)
+	orm.Select(value)
 	return
 }
 
diff --git a/orm.go b/orm.go
index 1d9a0de5..c12a9968 100644
--- a/orm.go
+++ b/orm.go
@@ -1,17 +1,23 @@
 package gorm
 
-import "database/sql"
+import (
+	"errors"
+	"strconv"
+
+	"database/sql"
+)
 
 type Orm struct {
 	TableName  string
 	PrimaryKey string
-	Error      bool
+	Error      error
 
 	db          *sql.DB
 	whereClause []interface{}
+	selectStr   string
 	orderStr    string
-	offsetInt   int64
-	limitInt    int64
+	offsetInt   int
+	limitInt    int
 }
 
 func (s *Orm) Where(querystring interface{}, args ...interface{}) *Orm {
@@ -19,31 +25,37 @@ func (s *Orm) Where(querystring interface{}, args ...interface{}) *Orm {
 	return s
 }
 
-func (s *Orm) First(out interface{}) *Orm {
-	return s
-}
-
-func (s *Orm) Find(out interface{}) *Orm {
-	return s
-}
-
 func (s *Orm) Limit(value interface{}) *Orm {
+	switch value := value.(type) {
+	case string:
+		s.limitInt, _ = strconv.Atoi(value)
+	case int:
+		s.limitInt = value
+	default:
+		s.Error = errors.New("Can' understand the value of Limit, Should be int")
+	}
 	return s
 }
 
 func (s *Orm) Offset(value interface{}) *Orm {
+	switch value := value.(type) {
+	case string:
+		s.offsetInt, _ = strconv.Atoi(value)
+	case int:
+		s.offsetInt = value
+	default:
+		s.Error = errors.New("Can' understand the value of Offset, Should be int")
+	}
 	return s
 }
 
 func (s *Orm) Order(value interface{}) *Orm {
-	return s
-}
-
-func (s *Orm) Or(querystring interface{}, args ...interface{}) *Orm {
-	return s
-}
-
-func (s *Orm) Not(querystring interface{}, args ...interface{}) *Orm {
+	switch value := value.(type) {
+	case string:
+		s.orderStr = value
+	default:
+		s.Error = errors.New("Can' understand the value of Order, Should be string")
+	}
 	return s
 }
 
@@ -51,7 +63,13 @@ func (s *Orm) Count() int64 {
 	return 0
 }
 
-func (s *Orm) Select(querystring string) *Orm {
+func (s *Orm) Select(value interface{}) *Orm {
+	switch value := value.(type) {
+	case string:
+		s.selectStr = value
+	default:
+		s.Error = errors.New("Can' understand the value of Select, Should be string")
+	}
 	return s
 }
 
@@ -75,6 +93,18 @@ func (s *Orm) Exec(sql string) *Orm {
 	return s
 }
 
-func (s *Orm) Explain() string {
-	return ""
+func (s *Orm) First(out interface{}) *Orm {
+	return s
+}
+
+func (s *Orm) Find(out interface{}) *Orm {
+	return s
+}
+
+func (s *Orm) Or(querystring interface{}, args ...interface{}) *Orm {
+	return s
+}
+
+func (s *Orm) Not(querystring interface{}, args ...interface{}) *Orm {
+	return s
 }
diff --git a/orm_test.go b/orm_test.go
index b8d0375d..6bf69931 100644
--- a/orm_test.go
+++ b/orm_test.go
@@ -6,12 +6,19 @@ import (
 	"testing"
 )
 
+type User struct {
+	Name string
+}
+
 func TestWhere(t *testing.T) {
 	db, err := Open("postgres", "user=gorm dbname=gorm")
 
 	if err != err {
 		t.Errorf("Error should be nil")
 	}
-	orm := db.Where("id = $1", 1).Where("name = $1", "jinzhu")
-	fmt.Println(orm.whereClause)
+	orm := db.Where("id = $1", 1, 3, 4, []int64{1, 2, 3}).Where("name = $1", "jinzhu")
+
+	user := &User{}
+	orm.First(user)
+	fmt.Println(user)
 }