ERROR:  invalid input syntax for type integer: ""
LINE 1: select nickname, title, css from user1 where id = '' and del...
                                                          ^

---
db.rb:117:in `exec'
db.rb:117:in `exec'
(erb):36:in `block in 
'
main.rb:18:in `run'
(erb):24:in `
'
/usr/lib/ruby/3.1.0/erb.rb:905:in `eval'
/usr/lib/ruby/3.1.0/erb.rb:905:in `result'
/usr/lib/ruby/3.1.0/erb.rb:890:in `run'
/usr/lib/cgi-bin/erb-euc.cgi:15:in `
'