PgAdmin窗口:
Java窗口:
1. 時間戳Long轉Timestamp
select TO_TIMESTAMP(1512490630) as time from tablename;
2. TimeStamp轉時間戳Long
轉10位
SELECT EXTRACT(epoch FROM NOW());
SELECT EXTRACT(epoch FROM CAST(‘2017-12-06 00:17:10’ AS TIMESTAMP));
轉13位 轉13位向下取整
SELECT EXTRACT(epoch FROM NOW())*1000,floor(EXTRACT(epoch FROM NOW())*1000);
4. String轉Date 只能得到年月日,得不到時分秒,怪哉,在這篇博文裏找到了答案,設計如此…
select to_date(‘2020-08-28 12:55:05’)
5. TimeStamp 10位,13位 轉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位轉String
SELECT to_char(to_timestamp(t.create_time / 1000), ‘YYYY-MM-DD HH24:MI:SS’)
參考:
https://blog.csdn.net/qq_36273946/article/details/86546350