diff --git a/dbtool/dbtool.go b/dbtool/dbtool.go
index 5251364..28720da 100644
--- a/dbtool/dbtool.go
+++ b/dbtool/dbtool.go
@@ -25,6 +25,7 @@ func ScanToStruct(rows *sql.Rows, ss interface{}) (ok bool, err error) {
 	return true, nil
 }
 
+// ScanToStructAll -
 func ScanToStructAll(rows *sql.Rows, ss interface{}) error {
 	sliceVal := reflect.Indirect(reflect.ValueOf(ss))
 	if sliceVal.Kind() != reflect.Slice {
@@ -53,6 +54,7 @@ func ScanToStructAll(rows *sql.Rows, ss interface{}) error {
 	return nil
 }
 
+// ResultToMap -
 func ResultToMap(r *sql.Rows) ([]map[string]interface{}, error) {
 	result := make([]map[string]interface{}, 0)
 	cols, err := r.Columns()
@@ -82,6 +84,7 @@ func ResultToMap(r *sql.Rows) ([]map[string]interface{}, error) {
 	return result, nil
 }
 
+// MapToStruct -
 func MapToStruct(data map[string]interface{}, out interface{}) error {
 	ss := reflect.ValueOf(out).Elem()
 	for i := 0; i < ss.NumField(); i++ {