SELECT DATE_PART('day', '2011-12-31 01:00:00'::timestamp - '2011-12-29 23:00:00'::timestamp); -- Result: 1 1. 2. 3. PostgreSQL-周中的日期差异 考虑使用 SQL Server 函数来计算两周中两个日期之间的差额: SQL Server: -- Difference between Dec 22, 2011 and Dec 31, 2011 in wee...
1、计算两个日期之间的天数差: SELECT date1 + INTERVAL '1 day' date2 AS days_diff; 2、计算两个日期之间的小时数差: SELECT (date1::time + INTERVAL '1 hour') (date2::time + INTERVAL '1 hour') AS hours_diff; 使用CAST和CONVERT函数计算时间差 我们需要将一个日期或时间值转换为另一个日期...
#我们插入一个date类型,timestamptz已经设定了default,就不插入了 testdb=# insert into teacher (birthdate) values (current_date); INSERT 0 1 testdb=# select * from teacher; id | create_at | update_at | birthdate ---+---+---+--- 1 | 2023-07-21 14:05:51.588512+00 | 2023-07-2...
select s.route, s.rtstop, c.xstr1||'x'||c.xstr2||'('||c.corner||')' as stop_street, t.arrival as act_arrival, s.arrival as sched_arrival, date_part('seconds',(t.arrival - s.arrival)) as sched_difffrom tracktime t join schedules s using (route, run, rtstop, sto...
You are now connected to database"test"asuser"postgres".test=# select*from tb_mytps;i|name---+---1|name12|name23|name34|name45|name56|name67|name78|name89|name910|name10(10rows) 开始备份 建立备份文件存放路径 代码语言:javascript 复制 [root...
select relname,oid from pg_class; 代码语言:javascript 代码运行次数:0 运行 AI代码解释 postgres=# select relname,oid from pg_class;relname|oid---+---pg_statistic|2619pg_type|1247pg_toast_1255|2836pg_toast_1255_index|2837pg_toast_1247|4171pg_toast_1247_index|4172pg_toast_2604|2830pg_toast...
如果你需要计算两个时间点之间的差异,可以使用age函数或者通过相减后使用date_part函数来提取具体的年、月、日等时间差。 SQL语句: sql -- 使用 age 函数 SELECT age('2030-04-10'::timestamp, '2000-06-13'::timestamp); -- 通过相减后使用 date_part 函数 SELECT date_part('year', '2030-04-10':...
SELECT t.relname, t.indexrelname, date_trunc('hour', snap_create_time) snap_day, t.idx_scan-lag(t.idx_scan,1) over w AS diff_idx_scan, t.idx_tup_read - lag(t.idx_tup_read,1) over w AS diff_idx_tup_read from db_stat.snapshot_pg_stat_all_indexes t ...
pg:5432:*:barman:123456#更改权限chmod 600 ~/.pgpass#验证psql -c 'SELECT version()' -U barman -h pg postgres yum安装barman 由于barman是python写的,且有些功能需要使用postgresql的工具,安装时会有些依赖 yum install -y https://download.postgresql.org/pub/repos/yum/11/redhat/rhel-7.6-x86_64/...
dateTemp timestamp; intervals interval; BEGIN IF lower($1) = lower(YEAR_CONST) THEN select cast(cast(incrementvalue as character varying) || ' year' as interval) into intervals; ELSEIF lower($1) = lower(MONTH_CONST) THEN select cast(cast(incrementvalue as character varying) || ' months...