fix CONCAT function not found on old version SQLite

Author: tanloong

Lib/sqlite3/__main__.py

@@ -68,7 +68,7 @@ def runsource(self, source, filename="<input>", symbol="single"):
                     select_clauses = (f"""SELECT
                         CASE '{schema}'
                             WHEN 'main' THEN name
-                            ELSE CONCAT('{schema}.', name)
+                            ELSE '{schema}.' || name
                         END
                         FROM "{schema}".sqlite_master
                         WHERE type IN ('table', 'view')