INSERT INTO "demo_class" ("id", "name", "grade", "created_at", "created_by") VALUES ('1162434271344852992', '二班', '3', '16:58:47.273', NULL);
INSERT INTO "demo_class" ("id", "name", "grade", "created_at", "created_by") VALUES ('1162430704567451648', '一班', '1', '16:44:36.887', '');
INSERT INTO "demo_class" ("id", "name", "grade", "created_at", "created_by") VALUES ('1162446666314285056', '二班', '1', '17:48:02.464', NULL);
INSERT INTO "demo_class" ("id", "name", "grade", "created_at", "created_by") VALUES ('1162499146419011584', '三班', '1', '21:16:34.694', NULL);
