I want to convert from datetime to time part only. Like this sample : 6/4/2009 3:50:06 PM to 3:50:06 PM I really appreciate for the help declare @time datetime select @time = getdate() select @time, convert(char(8),@time,108) as OnlyTime1, dateadd(dd, datediff(dd,@time,'1...
date是SQL Server 2008新引进的数据类型。它表示一个日期,不包含时间部分,可以表示的日期范围从公元元年1月1日到9999年12月31日。只需要3个字节的存储空间。 dateTime 日期和时间部分,可以表示的日期范围从公元1753年1月1日00:00:00.000 到9999年12月31日23:59:59.997 ,精确到3.33毫秒,它需要8个字节的存储空间。
为了优化性能,可以考虑在应用层获取当前时间,然后传递给数据库,而不是在每个SQL语句中都调用getdate函数。例如,可以在应用代码中获取当前时间: DateTime currentTime = DateTime.Now; 然后在SQL语句中使用这个时间值: INSERT INTO orders (order_id, order_date, customer_id, amount) VALUES (1, @currentTime, '...
SQL 複製 SELECT 'SYSDATETIME() ', CONVERT (time, SYSDATETIME()); SELECT 'SYSDATETIMEOFFSET()', CONVERT (time, SYSDATETIMEOFFSET()); SELECT 'SYSUTCDATETIME() ', CONVERT (time, SYSUTCDATETIME()); SELECT 'CURRENT_TIMESTAMP ', CONVERT (time, CURRENT_TIMESTAMP); SELECT 'GETDATE() ', CO...
這個getTimestamp 方法是由 java.sql.ResultSet 介面中的 getTimestamp 方法指定。 這個方法只會傳回 SQL Server datetime 和 smalldatetime 資料行中的值。 另請參閱 getTimestamp 方法 (SQLServerResultSet) SQLServerResultSet 成員 SQLServerResultSet 類別 ...
GetSqlDouble GetSqlFieldType GetSqlGuid GetSqlInt16 GetSqlInt32 GetSqlInt64 GetSqlMetaData GetSqlMoney GetSqlSingle GetSqlString GetSqlValue GetSqlValues GetSqlXml GetString GetTimeSpan GetValue GetValues IsDBNull SetBoolean SetByte SetBytes SetChar SetChars SetDateTime SetDateTimeOffset SetDB...
DAY() Extracts the day from date 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() Convert...
SQL_CONVERT_DOUBLE (32 位掩码) SQL_CONVERT_FLOAT (32 位掩码) SQL_CONVERT_INTEGER (32 位掩码) SQL_CONVERT_INTERVAL_YEAR_MONTH (32 位掩码) SQL_CONVERT_INTERVAL_DAY_TIME (32 位掩码) SQL_CONVERT_LONGVARBINARY (32 位掩码) SQL_CONVERT_LONGVARCHAR (32 位掩码) SQL_CONVERT_NUMERIC (32 位掩码...
SQL_ANSI_SQL_DATETIME_LITERALS SQL_CATALOG_LOCATION SQL_CATALOG_NAME SQL_CATALOG_NAME_SEPARATOR SQL_CATALOG_USAGE SQL_COLUMN_ALIAS SQL_CORRELATION_NAME SQL_CREATE_ASSERTION SQL_CREATE_CHARACTER_SET SQL_CREATE_COLLATION SQL_CREATE_DOMAIN SQL_CREATE_SCHEMA SQL_CREATE_TABLE SQL_CREATE_TRANSLATION SQL_DD...
Returns the current database system timestamp as a datetime value. The database time zone offset is not included. This value represents the current UTC time (Coordinated Universal Time). This value is derived from the operating system of the computer on which the instance of SQL Server is ...