On 2018-03-09 06:33, hugo.lar...@yahoo.com [firebird-support] wrote: > I have a column char(2) where two ASCII values stored. For example > 00000011, 00000001 are stored as (3,1). > When I do a select I dont get any result because the result is not > alphanumeric. 3 is ETX and 1 is NUL. > I can get the values programmatically but I want to do bit comparison > with sql query. > Anyone might know how?
You can use hex literals[1] for that, eg yourcolumn = x'0301' This requires Firebird 2.5 or higher. Be aware that 0x01 is not NUL, it is SOH (Start Of Heading), NUL is 0x00. Mark [1]: https://firebirdsql.org/file/documentation/release_notes/html/en/2_5/rnfb25-dml.html#rnfb25-dml-hex
