diff --git a/chain.go b/chain.go
index 9f05bdc..d5fa2b6 100644
--- a/chain.go
+++ b/chain.go
@@ -117,10 +117,10 @@ func (this *Query) QueryStmt() error {
 	sql = helper.StringJoin("select ", title)
 
 	if this.alias != "" {
-		this.table = helper.StringJoin(table, " as ", this.alias)
+		table = helper.StringJoin(table, " as ", this.alias)
 	}
 
-	sql = helper.StringJoin(sql, " from ", this.table)
+	sql = helper.StringJoin(sql, " from ", table)
 
 	if len(this.join) > 0 {
 		for _, joinitem := range this.join {