In a PostgreSQL table I have a column file_bytes which has the data type bytea.
I am looking for a simple SQL statement to manipulate only the last byte of the content of this column.
PostgreSQL: manipulate binary data - change last byte with SQL command
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demo: db<>fiddle
https://www.postgresql.org/docs/current/static/functions-binarystring.html
octet_length()gives the number of bytes of binary data.overlay()allows to rewrite data from a certain position.