generate_db_helpers: add a 'Select' function on table schemas

scripts/generate_db_helpers.go

@@ -520,7 +520,8 @@
 	}
 	return {{.Name}}Table + " AS " + t.alias
 }
+
 func (t {{.Name}}TableSchema) ToSql() (string, []interface{}, error) {
 	return t.Sql(), nil, nil
 }
 
@@ -523,8 +524,10 @@
 func (t {{.Name}}TableSchema) ToSql() (string, []interface{}, error) {
 	return t.Sql(), nil, nil
 }
 
-
+func (t {{.Name}}TableSchema) Select() squirrel.SelectBuilder {
+	return squirrel.Select(t.Columns(true)...).From(t.Sql())
+}
 
 {{- end}}