SqlFunctions.CurrentTimestamp 方法 參考 定義 命名空間: System.Data.Entity.SqlServer 組件: EntityFramework.SqlServer.dll 傳回目前的日期和時間。 C# [System.Data.Entity.DbFunction("SqlServer","CURRENT_TIMESTAMP")]publicstaticNullable<DateTime>CurrentTimestamp(); ...
syntaxsql CURRENT_TIMESTAMP 引數 這個函數沒有引數。 傳回類型 datetime 備註 舉凡Transact-SQL 可以參考datetime運算式之處,都能參考CURRENT_TIMESTAMP。 CURRENT_TIMESTAMP是非決定性函數。 參考這個資料行的檢視和運算式,是無法編製索引的。 範例 這些範例使用六個可傳回目前日期和時間值的 SQL Server 系統函數...
Transact-SQL 语法约定 语法 syntaxsql CURRENT_TIMESTAMP 参数 此函数没有参数。 返回类型 datetime 备注 Transact-SQL 语句可以在能引用 datetime 表达式的所有位置引用CURRENT_TIMESTAMP。 CURRENT_TIMESTAMP是非确定性的函数。 引用该列的视图和表达式无法进行索引。
SQL Server date and time functions FunctionDescription GETDATE() Returns the current date and time DATEPART() Returns part of the date DATEDIFF() Calculates the difference between two dates SYSUTCDATETIME Returns the system date and time in UTC CONVERT() Converts date and time to different forma...
Note that the NOW MySQL function has three synonyms: CURRENT_TIMESTAMP() LOCALTIME() LOCALTIMESTAMP() Calling the above three functions in MySQL is equivalent to calling NOW(). MySQL NOW Function: Use Cases The most common use cases of the datetime NOW MySQL function includes: Scheduling task...
datetime类型和timestamp类型的取值范围,CURRENT_DATE()函数应用,NOW()函数应用,DATE_FROMAT()函数取星期,日期、字符串、时间戳相互转换等。 时间范围 datetime类型范围:1000-01-01 00:00:00 ~ 9999-12-31 23:59:59 timestamp类型范围:1970-01-01 08:00:01 ~ 2038-01-19 11:14:07 ...
NoSQL 复制 SELECT VALUE { currentUtcDateTime: GetCurrentDateTime() } JSON 复制 [ { "currentUtcDateTime": "2019-05-03T20:36:17.1234567Z" } ] 注解 此函数是非确定性的。 返回的结果为 UTC(协调世界时),精准率为 7 位,准确度为 100 纳秒。 此函数不使用索引。 如果需要将值与当前时间进行...
The CURRENT_GMTTIMESTAMP datetime function returns the current date and time in the GMT time zone. Syntax CURRENT_GMTTIMESTAMP CURRENT_GMTTIMESTAMP returns a GMTTIMESTAMP value representing the current date and time in the GMT time zone. As with all SQL functions that take no parameters, no ...
In some data science projects, you’ll need only a specific part of your datetime value… Do you need themonthsonly? Thedays? Theseconds? Not a problem. Just use thedate_partSQL function. This is its logic: SELECT date_part('[which_part_you_need]',(SELECT current_timestamp)); ...
CURRENT_ROW_TIMESTAMP is an Amazon Kinesis Data Analytics extension to the SQL:2008 specification. This function returns the current timestamp as defined by the environment on which the Amazon Kinesis Data Analytics application is running. CURRENT_ROW_TIMESTAMP is always returned as UTC, not the ...