除了使用单独的表达式来计算每个时间单位的日期时间差之外,还可以使用类似于 SQL Server DATEDIFF 函数的函数。 PostgreSQL: CREATE OR REPLACE FUNCTION DateDiff (units VARCHAR(30), start_t TIMESTAMP, end_t TIMESTAMP) RETURNS INT AS $$ DECLARE diff_interval INTERVAL; diff INT = 0; years_diff INT = ...
PostgreSQL 是一个功能强大的开源关系型数据库管理系统,广泛用于各种应用场景。在 PostgreSQL 中,日期和时间数据类型(如 date 和timestamp)提供了丰富的函数和操作符,用于处理日期和时间的计算和比较。 查找两个日期之间的差异大于1天/月的记录 1. 查找两个日期之间的差异大于1天的记录 假设我们有...
有两种方式可以获得mysql两个日期之间的差值,一种是使用TO_DAYS函数,另一种是datediff函数 select id, TO_DAYS(NOW()) - TO_DAYS(createTime...) as dayFactor, datediff(NOW(),createTime) as da...
1.6、查询当天、昨天、前天的数据: SELECT * FROM zhfw_service_theme WHERE TO_DAYS(created_time) = TO_DAYS(NOW()) SELECT count(*) FROM `t_view` WHERE DATEDIFF(now(),create_time) = 0 SELECT count(*) FROM `t_view` WHERE DATEDIFF(now(),create_time) = 1 SELECT count(*) FROM `t_v...
CREATE FUNCTIONpublic.check_date("@rq"int)RETURNS int LANGUAGE pltsql AS'{"version_num": "1", "typmod_array": ["-1", "-1"], "original_probin": ""}','BEGIN DECLARE @h1 intset@h1=datediff(hour,getdate()-@rq,getdate());RETURN(@h1)END'; ...
IN (spid); 检查堵塞 select a.txn_owner, a.txn_db, a.xid, a.pid, a.txn_start, a.lock_mode, a.relation as table_id,nvl(trim(c."name"),d.relname) as tablename, a.granted,b.pid as blocking_pid ,datediff(s,a.txn_start,getdate())/86400||' days '||datediff(s,a.txn_start...
请注意,DATEDIFF 返回了 2 天,尽管 datetime 值之间只有 1 天 2 小时。 在PostgreSQL 中,如果您从另一个中减去一个日期时间值(TIMESTAMP,DATE 或 TIME 数据类型),则将获得一个 INTERVAL 值,格式为“ ddd days hh:mi:ss ”。 SELECT'2011-12-31 01:00:00'::timestamp-'2011-12-29 23:00:00'::tim...
DATEDIFF in Report Builder DateDiff In Reporting Services DateDiff to show working days DateTime Conversion and Comparison - Errors DateTime parameter with NULL value DateTime parameter with NULL value is default DateTime to string in expression for parameter usage DB tables records/data update using SSR...
the right of the first non-null argument are not evaluated. This SQL-standard function provides capabilities similar to NVL and IFNULL, which are used in some other database systems.没有DateDiff对应的函数，直接相减 date '2001-10-01' - date '2001-09-28' integer '3' (days)
"adddate", "addtime", "convert_tz", "curdate", "current_date", "curtime", "current_time", "current_timestamp", "date_add", "date_format", "date_sub", "datediff", "day", "dayname", "dayofmonth", "dayofweek", "dayofyear", "extract", "from_days", "from_unixtime", "get_for...