66.sql server 數據庫直接計算時間差

時間 2019-11-12

標籤 66.sql sql server 數據庫直接計算時間差欄目 SQL 简体版

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1. sql server 數據庫直接計算時間差sql

-- 計算兩個時間差結果是int類型數據庫

SELECT DATEDIFF(YEAR,'2005-12-29','2008-12-30') AS DiffDate -- 年server

SELECT DATEDIFF(MONTH,'2005-12-29','2008-12-30') AS DiffDate -- 月 it

SELECT DATEDIFF(DAY,'2008-12-10','2008-12-30') AS DiffDate -- 日 select

SELECT DATEDIFF(HOUR,'2008-12-30 00:00:00','2008-12-30 10:20:00') AS DiffDate -- 小時 im

SELECT DATEDIFF(MI,'2008-12-30 00:00:00','2008-12-30 00:20:10') AS DiffDate -- 分鐘數據

SELECT DATEDIFF(SECOND,'2008-12-30 00:00:00','2008-12-30 00:01:10') AS DiffDate -- 秒top

2.時間長短截取img

select top 5
       a.monitor_time as '本來時間格式',
       convert(varchar(23),a.monitor_time ,121) as '23位數據格式',
       convert(varchar(19),a.monitor_time ,121) as '19位數據格式',
       convert(varchar(16),a.monitor_time ,121) as '16位數據格式',
       convert(varchar(13),a.monitor_time ,121) as '13位數據格式',
       convert(varchar(10),a.monitor_time ,121) as '10位數據格式'
       from t_air_monitor_factor_rtdata a order by monitor_time desc時間

效果：

-- 默認的時間格式
select CONVERT(varchar(20),GETDATE()) as nowTime

-- 標準時間格式
select CONVERT(varchar(20),GETDATE(),121) as nowTime

-- 截取時間格式到日
select CONVERT(varchar(10),GETDATE(),121) as nowTime
-- 截取時間格式到小時
select CONVERT(varchar(13),GETDATE(),121) as nowTime

-- 截取時間格式到分鐘
select CONVERT(varchar(16),GETDATE(),121) as nowTime

-- 截取時間格式到秒
select CONVERT(varchar(19),GETDATE(),121) as nowTime

-- 只須要小時分鐘秒
select CONVERT(varchar(8),GETDATE(),114) as nowTime