![]() TDateTimeHelper = record helper for TDateTime public class function ParseExact ( const Value, Format : string AFormatSettings : TFormatSettings ): TDateTime static end #FREE PASCAL CONVERT TIMESTAMP TO DATE CODE#I might improve this code to have time part and to handle my possible fail cases in the future. I am not after very fast code at the moment. I would vote for such a function to be implemented in Delphi by Embarcadero though.įor now, I have written something as following. Shared C# code conversion is out of my league. I might be completely wrong about that though. I could not make StrToDate() working for me even with TFormatSettings provided and even with several different input strings like "22 September 2019", "22/September/2019", etc.Ģ- It would be great if anybody have a unit or a function he/she can share which handles provided date format like 'dddd, dd mmmm yyyy' and convert the input string to TDateTime using that given format. I do not know C#. I saw several examples of DateTime.ParseExact() which seems like what I am searching for. I appreciate if you can point me to right existing Delphi solution. I am trying not to manually parse the string as it is due to change in the future, too.ġ- It is always possible one cannot see a simple solution. Now, format changed to "Sunday, 22 September 2019" and that function is not so helpful as before. Want more Presto tips & tricks? Sign up for our Presto community newsletter.I used to parse date string "Tue " in an e-mail message using VarToDateTime() which served its purpose well. #FREE PASCAL CONVERT TIMESTAMP TO DATE HOW TO#Looking for related content? How To Convert Date String to Presto Date Format Option 2: Java DateTime format parser, Non Standard Date format using You need to parse the string using either date_parse or parse_datetimeĮxample problem: Need to convert the following timestamp to date: ‘T19:02:57.415006+01:00’Įxample solution: Option 1: MySQL parser, Non Standard Date format using How do I convert string with timestamp to a date?Īnswer: You are trying to accurately convert a string of the format such as ‘T19:02:57.415006+01:00’ to date and use it in your query for comparison. Select now() as time_now where current_date > parse_datetime('01-06-2021','dd-MM-YYYY') Option 5: Java DataTime for parser, Non Standard Date format using date_parse Option 4: MySQL parser, Non Standard Date format using date_parse Select now() as time_now where current_date > from_iso8601_date('') Select now() as time_now where current_date > Cast ( '' as Date) The operator in the error can be any operator >,=,=, date '' Why am I getting the following error: ‘>’ cannot be applied to date, varchar (10)Īnswer: You are trying to compare a string literal in your query to a date type in your schema. The above 5 examples should allow you to convert timestamps to dates in any scenario. We can use date_format() which is one of Presto’s MySQL-compatible functions: presto:demo> select date_format(current_timestamp, '%Y%m%d') as "Today's date" įinally we can use format_datetime() which uses a format string compatible with JodaTime’s DateTimeFormat pattern format: presto:demo> select format_datetime(current_timestamp, 'Y-M-d') as "Date" Or we can use date() which is an alias for cast(x as date): presto> select date(current_timestamp) as "Today's date" To grab the date part of a timestamp we can simply cast to a date: presto> select cast(current_timestamp as date) as "Today's date" To test this out we can use Presto’s built-in current_timestamp function (an alias for the now() function) that returns the current system time as a timestamp: presto> select current_timestamp as "Date & Time Here Now" Many of these allow us to specifically convert a timestamp type to a date type. Luckily Presto has a wide range of conversion functions and they are listed in the docs. How do I convert timestamp to date with Presto? ![]()
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