postgresql 获取两个时间类型小时差值案例

我就废话不多说了，看代码吧~

select extract(day from t) * 24 + extract(hour from t) from (select (timestamp '2013-12-14 12:00:00' - timestamp '2013-12-11 4:00:00') as t) as a;

例如a表中有start，end俩字段

select extract(day from (end-start)) * 24 + extract(hour from (end-start)) from a

补充：PostgreSQL得出两个timestamp的秒数差值

sql语句

SELECT EXTRACT(EPOCH FROM (TIMESTAMP '2017-12-16 12:21:13'- TIMESTAMP '2017-12-15 12:21:00'));

86413

计算两个时间的差值更新另一个时间字段

UPDATE your_table

SET this_time=(EXTRACT(EPOCH FROM (time_a-time_b)));