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What are the problems with date and time in SQL Server?
One of the problems is that most SQL Server date/time data types are fairly ambiguous. For example, suppose we have a table in a database that tracks security-related events, and one of the rows shows an event occurring on May 15, 2015 at 3:30 in the morning.
How are the dates stored in SQL Server?
Let’s start with the DATETIME data type. According to SQL Server documentation, the database engine stores a DATETIME value as two integers. The first integer represents the day and the second integer represents the time.
Is the YYY MM DD format compatible with SQL Server 2008?
If you use SQL Server 2008 or newer and the DATE datatype (only DATE – not DATETIME !), then you can indeed also use the YYYY-MM-DD format and that will work, too, with any settings in your SQL Server. Don’t ask me why this whole topic is so tricky and somewhat confusing – that’s just the way it is.
Why does SQL Server not convert Char to datetime?
The conversion of a char data type to datetime resulted in a datetime value that is out of range of allowed values. There are many formats supported by SQL Server – see the MSDN Books Online on CAST and CONVERT. Most of those formats are dependant on what settings you have – therefore, these settings might work some times – and sometimes not.
How to store date and time in a database?
To store information in a database, I would use a char column-type to store the whole America/Santiago timezone identifier and another char column-type to store the date/time (in the yyyy-mm-dd hh:ii:ss format). Alternatively, you can pick a ‘datetime’ column-type, as long as that type ignores timezones altogether.
How are datetime and interval data types used in Oracle?
Businesses conduct transactions across different time zones. Oracle Database datetime and interval data types and time zone support make it possible to store consistent information about the time of events and transactions. This chapter describes Oracle Database datetime and interval data types.
How to get dates and times horribly wrong?
The first integer represents the day and the second integer represents the time. The days can range from January 1, 1753, through December 31, 9999, and the times can range from 00:00:00.000 through 23:59:59.997, with the default value being 1900-01-01 00:00:00.000. The default value is particularly important when it comes to the date.