Of course Python also can show difference between timestamps: import datetimeĭt_old = (' 22:33:44', '%Y-%m-%d %H:%M:%S')ĭt_diff = (datetime.datetime. You can use the timezone() and AT TIME ZONE functions to convert a TIMESTAMPTZ into a TIMESTAMP at a specified timezone, or to convert a TIMESTAMP into a. When you want to show difference between now and some datetime you can use PostgreSQL age() function: select age(timestamp '') Lafada answer covers Python formating of datetime objects. The timestamptz datatype is a time zone-aware date and time data type. You will get something like: "07.03.13 08:40:50" This tutorial helps you understand the PostgreSQL timestamp data types: timestamp. Within the Extract keyword we have to mention HOUR as we are getting HOUR from timestamp. If we could get a proper date and time representation, it will be easier to debug the data.PostgreSQL has a built-in function totimestamp () that can be used for this exact purpose. Use () to create a datetime object with UTC timezone. To Get hour from Timestamp in postgresql we use Extract Keyword. Problem When querying the database, timestamps in this format are not very useful as we can’t figure out which date and time the string is representing. With: select to_char(current_timestamp, 'DD.MM.YY HH12:MI:SS') Convert the UTC timestamp to a datetime object with datetime.utcfromtimestamp(). There are many PostgreSQL datetime functions, PostgreSQL format functions that can be used as well as Python functions. You should use current_timestamp if you want date, time and time zone.Ĭonverting such date for string can be done on both server and client side. When you INSERT or UPDATE timestamp column with just date then time part will be cut to 00:00:00. See for results of: select current_date, current_timestamp Similarly, tonumber is unnecessary for standard numeric representations. For most standard date/time formats, simply casting the source string to the required data type works, and is much easier. You got 00:00:00 as time part probably because somebody inserted just date without time part. totimestamp and todate exist to handle input formats that cannot be converted by simple casting.
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