![]() ![]() TO_CHAR converts a timestamp or numeric expression to a character-string data format. To_char(order_date, '20-10-2020')is not a filter and you are using it wrong. You should also be able to provide a date instead of a timestamp. Question 1ĭATE_TRUNC('datepart', timestamp) also supports week as datepart - see Date parts for date or timestamp function ( Also shown in the example of AWS). Hey, Stranger It looks like you're new here. ![]() ![]() Question 1 DATETRUNC ('datepart', timestamp) also supports week as datepart - see Date parts for date or timestamp function ( Also shown in the example of AWS ). SELECT to_date ('', 'DD Mon YYYY') tells redshift to convert the string '' to date. datetrunc ('month', 'Date (Lead Created)') > datetrunc ('month', currentdate - INTERVAL '3 months') AND datetrunc ('month', 'Date (Lead Created)') < datetrunc ('month', currentdate)) FROM masterdataset It works on my database side perfectly. SELECT todate ('', 'DD Mon YYYY') tells redshift to convert the string '' to date. Question 2Ī date data type column has no format - you may an sql client that can display date columns in different formats, however, this is not a functionality of redshift. There is a general difference between '' and date '' - the first one is just a varchar, a string, NOT handled as a date by Redshift, the 2nd one tells Redshift to handle the string as date and therefore works. I am answering the questions in a different order as there are some wrong assumptions: Question 3 I know there would be no need to use to_char in this case but just asking. month, week or hour, and it will return the. If I have a WHERE filter like to_char(order_date, '20-10-2020'), and there are indeed some rows with this order date, will these rows still show in my results (after running query) if these rows are in DATE format (so 20 Oct is in date format) as opposed to string (which is what I am filtering by as I am doing to_char). Redshift datetrunc function is used to truncate a timestamp or interval based on a specified date part, e.g. I don't see in this general format that we need "day". Select to_char(date '', 'MM') < in this example, why do we need "date" for this to work? The general format for to_char should be TO_CHAR (timestamp_expression, 'format'). If I am doing: SELECT to_date ('', 'DD Mon YYYY') How can I ensure the resulting format is in a date format I specify (rather than the default date format)? For example if I want it in format DD-MM-YYYY? the start of the week? So if I have date_trunc(week, ) and I want to get the start of the week that 28th of October lies in (so 26th of October)? I tried this in my SQL command line but I get error messages. Can we use date_trunc for a date (not date-time) that we are trying to "truncate" (not sure if the term can be applied here) to e.g. ![]()
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |