PgAdmin窗口:
Java窗口:
1. 时间戳Long转Timestamp
select TO_TIMESTAMP(1512490630) as time from tablename;
2. TimeStamp转时间戳Long
转10位
SELECT EXTRACT(epoch FROM NOW());
SELECT EXTRACT(epoch FROM CAST(‘2017-12-06 00:17:10’ AS TIMESTAMP));
转13位 转13位向下取整
SELECT EXTRACT(epoch FROM NOW())*1000,floor(EXTRACT(epoch FROM NOW())*1000);
4. String转Date 只能得到年月日,得不到时分秒,怪哉,在这篇博文里找到了答案,设计如此…
select to_date(‘2020-08-28 12:55:05’)
5. TimeStamp 10位,13位 转String
select to_char(to_timestamp(1512490630), ‘YYYY-MM-DD HH24:MI:SS’);
SELECT to_char(to_timestamp(t.create_time / 1000), ‘YYYY-MM-DD HH24:MI:SS’);
10位转String
SELECT to_char(to_timestamp(t.create_time / 1000), ‘YYYY-MM-DD HH24:MI:SS’)
参考:
https://blog.csdn.net/qq_36273946/article/details/86546350