update

2025-12-02 19:16:31 +08:00
parent 7a5099188e
commit 5dec90aa2a
2 changed files with 6 additions and 0 deletions
--- a/PostgreSQL/common.sql
+++ b/PostgreSQL/common.sql
@@ -52,3 +52,6 @@ vacuum full study.r;
 -- "(0,2)",3,103
 -- "(0,3)",4,104
 -- 看到空间已经回收
+
+-- 查看数据类型
+select pg_typeof(EXTRACT(EPOCH FROM current_timestamp(0)))