Fortern/sql-study
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update

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

3
PostgreSQL/time.sql
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@@ -8,3 +8,6 @@ select msg_time at time zone 'Asia/Shanghai' from msg where id = 1;
select msg_time at time zone 'UTC+8' from msg where id = 1; select msg_time at time zone 'UTC+8' from msg where id = 1;
select to_timestamp(1761850339) AT TIME ZONE 'Asia/Shanghai'; select to_timestamp(1761850339) AT TIME ZONE 'Asia/Shanghai';
-- 将当前时间转换为Unix时间戳
select EXTRACT(EPOCH FROM current_timestamp(0)) - 60;