#Sqlite datetime plus

Again, the doc is your best friend as always. Use strftime() function instead if you need more precise control over the format of the output date. Double check by yourself that the statement works the way you need and adjust parameters accordingly if not. My assumption is that the timestring value you supply is already local time and your machine's settings are correct for your location. If 'localtime' is not mentionned, times default to UTC as the doc says. Instead, it leverages some built-in date and time functions to use other storage classes such as TEXT, REAL, or INTEGER for storing the date and time values. Result: datetime('now') strftime('%Y-%m-%d %H:%M:%S', 'now')Īs with all SQLite date and time functions, datetime() only works for dates between 00:00:-12-31 23:59:59 (julian day numbers 1721059.5 through 5373484.5).įor dates outside that range, the results are undefined.Correct on all points. SQLite does not support built-in date and/or time storage class.

The datetime() function is just a more convenient way to do it. The datetime() function returns exactly the same result that strftime('%Y-%m-%d %H:%M:%S'. Result: 23:58:57 datetime() vs strftime() Here’s an example that uses the Julian Day as the time string. If only the time part is supplied, then the date is set to. If you provide just the date part, the time part will be set to all zeros. The above examples use now as the time string, but you can provide any valid time string. Here it is again comparing the original local time with the modified result: SELECTĭatetime('now', '+3 hours', 'localtime') AS 'Modified' Therefore, you may get a different result, depending on your local time.

It then adjusts the time string so that it displays local time. The reason it does this is because the localtime modifier assumes the time string provided is in Universal Coordinated Time (UTC). In my case, the localtime modifier resulted in the time being moved forward. We can also modify the date and time by adding/subtracting years, months, days, hours, minutes, and seconds or we can get the current date and time, at the time of execution of the function. Therefore, we can use it to extract the day, month, and year from a date. SELECT datetime('now', '+3 hours', 'localtime') The datetime() function is used to get the time in the format of YYYY:MM:DD HH:MM:SS. In SQLite, we can use the strftime() function to return datetime values in our chosen format. Here’s an example of adding another modifier to the previous example. Following command computes the current date. Examples Let's try various examples now using SQLite prompt. You can use the following substitutions to format your date and time. Multiple ModifiersĪs mentioned, you can add one or more modifiers. SQLite provides a very handy function strftime () to format any date and time. Given the original time, this also resulted in the date being moved forward to the next day. In this case, I added three hours to the time. We can modify the previous result by using a modifier. The now time string is converted into the current date and time. Here’s an example to demonstrate the datetime() function being used with one argument. If you provide a modifier, it must be a valid modifier. The timestring argument must be a valid time string. A Julian Day is the number of days since BC 12:00pm Greenwich time in the Gregorian calendar. The SQLite julianday () function returns the date according to julian day. The syntax goes like this: datetime(timestring, modifier, modifier. The SQLite datetime () function is used to calculate a date/time value, and return it in the format 'YYYY-MM-DD HH:MM:SS'. The result format of DateTime function is ‘YYYY-MM-DD HH:MM:SS’. These functions understand ISO-8601 style date and time formats, allowing you to store dates and times as human readable strings that retain important information, like time zone offsets, and also. A modifier allows you to change the date, such as add a number of days, set it to local time, etc Syntax To retrieve date and time in different formats, the DateTime function is used in SQLite. While SQLite may not have a native DateTime data type, it does have a set of datetime functions that make working with time pretty straightforward.

#Sqlite datetime plus

To use this function, you need to provide a time string, plus any (optional) modifiers. It returns the date in this format: YYYY-MM-DD HH:MM:SS The strftime() function is the most versatile function of the five. They also accept other arguments for modifying/formatting the output. These are: date() time() datetime() julianday() strftime() All of these functions accept a time string as an argument. The SQLite datetime() function enables you to return a date and time value based on a time string and any modifiers. SQLite supports five functions for working with dates and times.