File format decode date and time in a sequence of binary data


The following sections in this topic provide information about and examples for using the date and time data types and functions. Converting date, time, datetime2, and datetimeoffset. Conversion Between String Literals and time ndate, datetime2 nand datetimeoffset n. Backward Compatibility for Down-level Clients. String literal formats affect the presentation of data in applications to users but not the underlying integer storage format in SQL Server. Some string literal formats are not affected by these settings.

Consider using file format decode date and time in a sequence of binary data format that does not depend on these settings, unless you know the settings are correct for the format. The ISO format does not depend on these settings and is an international standard. Transact-SQL that uses string literal formats, dependent on system settings, is less portable.

To find out the default string literal format for down-level clients, see the topic for each date and time data type. The ydm date format is not supported for the datedatetime2 and datetimeoffset types. A run time error will be raised. The following table lists different date and time string formats.

The ISO formats, 'T Yes datedatetime2datetimeoffset. No datetime2datetimeoffset. You can specify date data as an unseparated string.

The date data can be specified by using four, six, or eight digits, an empty string, or a time value without a date value. The six-digit or eight-digit strings are always interpreted as ymd. The month and day must always be two digits. A string of only four digits is interpreted as the year. The month and date are set to January 1.

When you specify only four digits, you must include the century. To use the ISO format, you must specify each element in the format.

This includes the Tthe colons: The brackets indicate that the fractional seconds or time zone offset components are optional. The advantage in using the ISO format is that it is an international file format decode date and time in a sequence of binary data. Date and time values that are specified by using this format are unambiguous. You can specify a month as a name, for example, April or the abbreviation Apr in English.

Commas are optional and capitalization is ignored. If you specify only the last two digits of the year, values less than the last two digits of the value of the two digit year cutoff configuration option are in the same century as the cutoff year. Values that are greater than or equal to the value of this option are in the century that comes before the cutoff year.

For example, if two digit year cutoff file format decode date and time in a sequence of binary data default25 is interpreted as and 50 is interpreted as To avoid ambiguity, use four-digit years. The following formats are the valid alphabetical formats for SQL Server date data. Characters that are enclosed in brackets are optional.

You can specify date data with a numeric month. This string must appear in the following form:. If the order does not match the setting, the values are not interpreted as dates, because they are out of range or the values are misinterpreted. A four-digit year will be interpreted as year. Enclose each format with single quotation marks '. You can specify a suffix of AM or File format decode date and time in a sequence of binary data to indicate if the time value is before or after 12 noon.

The case of AM or PM is ignored. Hours can be specified by using either a hour or hour clock. The hour values are interpreted as follows. The hour value of 00 represents the hour after midnight AMregardless of whether you specify AM. You cannot specify PM when the hour equals Hour values from 01 through 11 represent the hours before noon if neither AM nor PM is specified.

They also represent the hours before noon when AM is specified. They represent hours after noon if PM is specified. The hour value 12 represents the hour that starts at noon if neither AM nor PM is specified. If AM is specified, it represents the hour that starts at midnight. If PM is specified, it represents the hour that starts at noon. Hour values from 13 through 23 represents hours after noon if AM or PM is not specified. They also represent the hours after noon when PM is specified.

You cannot specify AM when the hour value is from 13 through Milliseconds can be preceded by either a colon: If preceded by a colon, the number means thousandths-of-a-second. If preceded by a period, a single digit means tenths-of-a-second, two digits mean hundredths-of-a-second, and three digits mean thousandths-of-a-second. Specifies the type of the escape sequence. Is the value of the escape sequence. There are two kinds of conversions between different date types: Conversions from string literals to date and time types are permitted if all parts of the strings are in valid formats.

Otherwise, a runtime error is raised. Implicit conversions or explicit conversions that do not specify a style, from date and time types to string literals will be in the default format of the current session. The following table shows the rules file format decode date and time in a sequence of binary data conversion between datetimedatetime2 and datetimeoffset types and string literals.

ODBC string literals are mapped to the datetime data type. The fractional seconds precision of datetime has an accuracy of one three-hundredths of a second equivalent to 3. Values are rounded to increments of. For time 3datetime2 3 or datetimeoffset 3the fractional seconds precision has an accuracy of one millisecond. The tables in this section describe how each of the following date and time data types is converted to the other date and time data types:. The following table describes what occurs when a date data type is converted to other date and time data types.

The conversion fails, and error message is raised: The date is copied. The following code shows the results of converting a date value to a datetime value. When the date value is in the range of a smalldatetimethe date component is copied and the time component is set to When the date value is outside the range of a smalldatetime value, error message is raised: The following code shows the results of converting a date value to a smalldatetime value.

The following code shows the results of converting a date value to a datetimeoffset 3 value. The following code shows the results of converting a date value to a datetime2 3 value.

The following table describes what occurs when a time data type is converted to other date and time data types. The hour, minute, and seconds are copied. When the destination precision is less than the source precision, the fractional seconds will be truncated to fit the destination precision. The following example shows the results of converting a time 4 value to a time 3 value.

The hour, minute, and second values are copied; and the date component is set to ''. When the fractional seconds precision of the time n value is greater than three digits, the datetime result will be truncated.

The following code shows the results of converting a time 4 value to a datetime value. The date is set to '', and the hour and minute values are copied. The seconds and fractional seconds are set to 0. The following code shows the results of converting a time 4 value to a smalldatetime value.

The date is set to '', and the time is copied. When the fractional seconds precision of the time n value is greater than the precision file format decode date and time in a sequence of binary data the datetimeoffset n value, the value is truncated to fit.

The following example shows the results of converting a time 4 value to a datetimeoffset 3 type. The date is set to '', the time component is copied, and the time zone offset is set to When the fractional seconds precision of the datetime2 n value is greater than the time n value, the value will be truncated to fit.

The following example shows the results of converting a time 4 value to a datetime2 2 value. The following table describes what occurs when a datetime data type is converted to other date and time data types. The time component is copied, and the date component is set to ''. When the fractional precision of the time n value greater than three digits, the value will be truncated to fit.

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