Conversion from Sybase ASA - Mailing list pgsql-sql

From Richard Sydney-Smith
Subject Conversion from Sybase ASA
Date
Msg-id 001001c376a0$ee48a8d0$f06832d2@athlon2000
Whole thread Raw
Responses Re: Conversion from Sybase ASA  (Ian Barwick <barwick@gmx.net>)
List pgsql-sql
In sybase I can use the following syntax:
 

select 'T' as src,(if tbon is null or tbon < '1900/12/12' or tbon > '1900/9/30' then 'U' else 'P' endif) as pres from ftrans

this returns two columns: src = 'T' and pres which has either the value 'U' or 'P'

how would I express this in postgresql?

thanks

Richard

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