diff --git a/chain.go b/chain.go
index 96737f7..5b724c6 100644
--- a/chain.go
+++ b/chain.go
@@ -64,7 +64,9 @@ func (this *Query) Where(where string) *Query {
 	return this
 }
 func (this *Query) Wheres(wheres []string) *Query {
-	this.where = append(this.where, wheres...)
+	if len(wheres) > 0 {
+		this.where = append(this.where, wheres...)
+	}
 	return this
 }
 func (this *Query) WhereOr(where string) *Query {
@@ -158,13 +160,13 @@ func (this *Query) QueryStmt() error {
 
 	if this.page > 0 || this.page_size > 0 {
 
-		if this.page < 0 {
-			this.page = 0
+		if this.page < 1 {
+			this.page = 1
 		}
 		if this.page_size < 1 {
 			this.page_size = 10
 		}
-		from := strconv.Itoa(this.page * this.page_size)
+		from := strconv.Itoa((this.page - 1) * this.page_size)
 		offset := strconv.Itoa(this.page_size)
 		if from != "" && offset != "" {
 			sql = helper.StringJoin(sql, " limit ", from, " , ", offset)