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DATEDIFF can be used in the select list, WHERE, HAVING, GROUP BY and ORDER BY clauses. In SQL Server 2008, DATEDIFF implicitly casts string literals as datetime2 types. When using DATEDIFF with DATEADD, avoid implicit casts of string literals. For more information, seeDATEADD (Transact-SQL) ...
SQL > SQL Date Functions > Datediff Function The DATEDIFF function is used to calculate the difference between two dates, and is used in MySQL and SQL Server. The syntax for this date function is different between these two databases, so each one is discussed below: ...
SQL Languages Availability The DATEDIFF function is available in various SQL-based relational database management systems (RDBMS), but the specific function name, syntax, and supported units of time may vary between systems. Here are some examples of its availability: SQL Server: DATEDIFF(unit, sta...
syntaxsql DATEDIFF( datepart , startdate , enddate ) 引數 datepart 指定報告 startdate 與enddate之間差異的單位DATEDIFF。 常用的datepart單位包括month或second。 無法在變數中指定 datepart值,也不能指定為引號字串,例如'month'。 下表列出所有有效的datepart值。DATEDIFF接受 datepart的完整名稱,或完整名稱的任何...
syntaxsql DATEDIFF( datepart , startdate , enddate ) Arguments datepart Specifies the units in whichDATEDIFFreports the difference between thestartdateandenddate. Commonly useddatepartunits includemonthorsecond. Thedatepartvalue can't be specified in a variable, nor as a quoted string like'month'....
Transact-SQL 语法约定 语法 syntaxsql复制 DATEDIFF( datepart , startdate , enddate ) 参数 datepart 指定报告 startdate 和enddate之间的差异的单位DATEDIFF。 常用 datepart 单位包括month或second。 日期部分值不能在变量中指定,也不能指定为带引号的字符串'month'。
syntaxsql複製 DATEDIFF( datepart , startdate , enddate ) 引數 datepart 指定報告 startdate 與enddate之間差異的單位DATEDIFF。 常用的datepart單位包括month或second。 無法在變數中指定 datepart值,也不能指定為引號字串,例如'month'。 下表列出所有有效的datepart值。DATEDIFF接受 datepart的完整名稱,或完整名稱的...
syntaxsql DATEDIFF( datepart , startdate , enddate ) Arguments datepart Specifies the units in whichDATEDIFFreports the difference between thestartdateandenddate. Commonly useddatepartunits includemonthorsecond. Thedatepartvalue can't be specified in a variable, nor as a quoted string like'month'....
SQL Date Functions: DATEDIFF - Learn how to use the DATEDIFF function in SQL to calculate the difference between two dates. Understand its syntax and practical examples.