![]() ![]() Required for columns or expressions with the data type timestamp without time zone. Right now, extracting a year from that timestamp will give you 2009 instead of 2008, because that time in EST corresponds to 2009 in UTC. Parameters The name of your columns current time zone. Similarly, tonumber is unnecessary for standard numeric representations. If you omit the precision argument, the CURRENTTIMESTAMP () function will return a TIMESTAMP with a time zone that includes the full. The precision specifies the number of digits in the fractional seconds precision in the second field of the result. For most standard date/time formats, simply casting the source string to the required data type works, and is much easier. The PostgreSQL CURRENTTIMESTAMP () function accepts one optional argument. This means that if you want to process invoices differently based on their timezone of origin, you'll have to save that origin information in a separate column. Formatting Functions Tip totimestamp and todate exist to handle input formats that cannot be converted by simple casting. Special Values PostgreSQL supports several special date/time input values. Keep in mind that PostgreSQL will consume the timestamps and keep them internally as UTC. Conversions between timestamp without time zone and timestamp with time zone. Update your_table set invoiceyear=extract(year from invoicedate) Īlready mentioned extract() can get you the year out of a timestamptz. (to_timestamp(invoicedate,'Dy Mon DD YYYY HH24:MI:SS AAA TZHTZM')) Then you can alter the column, casting it in place: online demo create table your_table(invoicedate text) ![]() Seeing that you're dealing with text, it's best to convert it to an actual timestamptz first, using to_timestamp(). ![]()
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