#SQLITE DATETIME HOW TO#

It will be locked until that transaction is committed.ĭetect_types ( int) – Control whether and how data types notĪre looked up to be converted to Python types, If another connection opens a transaction to modify the database, Timeout ( float) – How many seconds the connection should wait before raisingĪn exception, if the database is locked by another connection. Pass ':memory:' to open a connection to a database that is Parametersĭatabase ( path-like object) – The path to the database file to be opened. connect ( database, timeout = 5.0, detect_types = 0, isolation_level = 'DEFERRED', check_same_thread = True, factory = sqlite3.Connection, cached_statements = 128, uri = False ) ¶

#SQLITE DATETIME HOW TO#

How to use the connection context managerĮxplanation for in-depth background on transaction control. How to convert SQLite values to custom Python types How to adapt custom Python types to SQLite values The N refers to a number that is added to the date, based on the unit specified.How to use placeholders to bind values in SQL queries You can use any of the following modifiers with date/time functions: The time string argument in all date/time functions can be supplied in any of the following formats: The difference is, strftime() enables us to explicitly specify the format of the output.įor example: SELECT strftime('%d/%m/%Y %H:%M:%S', 'now', 'localtime') Here it is with the localtime modifier: SELECT strftime('%Y-%m-%d %H:%M:%S', 'now', 'localtime') Īgain, same result as with datetime(). In this case we get the same result as when using the datetime() function. Here’s an example: SELECT strftime('%Y-%m-%d %H:%M:%S', 'now') The format string for strftime() can consist of any of the following substitutions: %d This is where you provide the format that you’d like the time string to be output in. Notice that the first argument is format. The syntax of this function goes like this: strftime(format, timestring, modifier, modifier. It enables you to provide the precise format that you want it to be presented. This function allows you to be very specific with how your date/time values are formatted. Result: 2458963.92637685 The strftime() FunctionĪs mentioned, the strftime() function can be used to output date and time values in any of the formats available in the previous functions. Here’s what it looks like using now as the timestring: SELECT julianday('now') Īnd here it is using the localtime modifier: SELECT julianday('now', 'localtime') The julianday() function returns the continuous count of days since the beginning of the Julian Period, which is Monday, JanuBC, proleptic Julian calendar (NovemBC, in the proleptic Gregorian calendar).

Result: ' 10:04:46' The julianday() Function Here’s an example: SELECT datetime('now') Īnd here it is with the localtime modifier: SELECT datetime('now', 'localtime')

The SQLite datetime() function combines the previous two functions, in the sense that it outputs both the date and the time. The time() function is similar to the date() function, except that it outputs the time instead of the date.Īnd here it is with the localtime modifier: SELECT time('now', 'localtime') This modifier assumes that the time string is in Universal Coordinated Time (UTC) and adjusts the time string so that it displays local time. In this case I used the localtime modifier. Here’s an example that uses a modifier: SELECT date('now', 'localtime') Here’s an example with just one argument: SELECT date('now') You can use the date() function with one argument, or with multiple arguments. In the strftime() function the first argument is the format string, followed by the time string, and any modifiers.Īll valid time strings and modifiers are listed near the bottom of this article.īut first, let’s go through some quick examples of each of these functions.

In the first four functions, the first argument is a time string, and any subsequent arguments are modifiers. Strftime(format, timestring, modifier, modifier. Julianday(timestring, modifier, modifier. )ĭatetime(timestring, modifier, modifier. The syntax of each function is as follows: date(timestring, modifier, modifier. The other four functions are available solely for convenience. In other words, you could use strftime() for all your date and time formatting requirements. In fact, this function can do everything the other four can. The strftime() function is the most versatile function of the five. They also accept other arguments for modifying/formatting the output. These are:Īll of these functions accept a time string as an argument. SQLite supports five functions for working with dates and times.

Sqlite datetime