diff --git a/index.js b/index.js
index <HASH>..<HASH> 100644
--- a/index.js
+++ b/index.js
@@ -61,4 +61,13 @@ exports.update=function(table,obj,where){
 exports.delete=function(table,where){
   if(!where){return false};
   return "delete from "+filter(table)+wheresql(where);
+}
+
+exports.bind=function(sql,obj){
+  var str=sql;
+  if(!obj){return str;}
+  for(var i in obj){
+    str=str.replace(":"+i,"\""+filter(obj[i])+"\"");
+  }
+  return str;
 }
\ No newline at end of file
add bind method like pdo