diff --git a/sql.go b/sql.go
index 4102391..e2c66d7 100644
--- a/sql.go
+++ b/sql.go
@@ -21,14 +21,14 @@ func initDB() {
 	failOnError(err, "initDB : set foreign_key_checks = 0")
 
 	var name string
-	rows, err := tx.Query("show tables")
+	rows, err := db.Query("show tables")
 	failOnError(err, "initDB : show tables")
 
 	for rows.Next() {
 		err = rows.Scan(&name)
 		failOnError(err, "initDB : show tables listing")
 
-		_, err = db.Exec("drop table " + name)
+		_, err = tx.Exec("drop table " + name)
 		failOnError(err, "initDB : drop table "+name)
 	}
 	err = rows.Err()