TABLESPACE DATA --指定保存物化视图的表空间 BUILD DEFERRED --延迟刷新不立即刷新 refresh force --如果可以快速刷新则进行快速刷新,否则完全刷新 on demand --按照指定方式刷新 start with to_date('24-11-2005 18:00:10', 'dd-mm-yyyy hh24:mi:ss') --第一次刷新时间 next TRUNC(SYSDATE+1)+18/24 ...
\set SQLTERM / CREATE OR REPLACE PROCEDURE p AUTHID DEFINER AS BEGIN DECLARE past_due EXCEPTION; due_date DATE := trunc(SYSDATE) - 1; todays_date DATE := trunc(SYSDATE); BEGIN IF due_date < todays_date THEN RAISE past_due; END IF; END; EXCEPTION WHEN OTHERS THEN NULL; END; / \...
trunc(v numeric, s int) numeric 截断为s小数位置的数字 trunc(42.438,2) 42.43 acos(x)反余弦 asin(x) 反正弦 atan(x) 反正切 atan2(x, y) 正切y/x 的反函数 cos(x) 余弦 cot(x) 余切 sin(x) 正弦 tan(x) 正切 字符串函数和操作符 string 丨丨 stringtext字串连接'Post' 丨丨 'greSQL'...
--数字相关函数 --随机数(0-1),默认15位小数selectrandom();--四舍五入函数selectround(10.45);selectround(10.45,1);--取整函数selectceil(3.36);--向上取整selectfloor(3.36);--向下取整--绝对值selectabs(-3.36);--取余数selectmod(9,4);--截断(向零靠近)selecttrunc(42.8);--截断为s小数位置的数字...
(client_addr))||':'||client_port END AS client, date_trunc('second', backend_start) AS backend_start, CASE WHEN state='active' THEN date_trunc('second', query_start)::text ELSE '' END AS query_start, date_trunc('second', xact_start) AS xact_start, state, date_trunc('second',...
> public | s3 | date_trunc('month'::text, a), date_trunc('day'::text, a) > FROM t3 | defined | (null) | (null) > (1 row) > > postgres(437635)=# EXPLAIN (STATS, ANALYZE) SELECT * FROM t3 > WHERE date_trunc('month', a) = '2020-01-01'::timestamp; ...
> > cased (when quoted) since 'date_trunc(day, now())'::timestamp doesn't > > work but 'now()'::timestamp does. > > Hmm, both of those behaviors are documented, but not in the same place > and possibly not anywhere near where you looked for info about ...
( 'order_id', found_order.order_id, 'total_price', trunc(found_order.total::double precision::text::numeric, 2), 'order_date', found_order.order_date, 'user', found_order.user_id, 'order_items', order_items )); END; $function$ ; select * from get_order_by_orde...
# 一、给函数参数添加类型 说明 在我们定义函数的时候参数的类型是无法推断的，因为函数只是一段将要执行...