diff --git a/sql/sqlite_convert_dt_to_unix.sql b/sql/sqlite_convert_dt_to_unix.sql
new file mode 100644
index 0000000..71f975d
--- /dev/null
+++ b/sql/sqlite_convert_dt_to_unix.sql
@@ -0,0 +1,2 @@
+UPDATE locations SET dt=strftime('%s', dt) WHERE typeof(dt)='text';
+VACUUM;