grcq vs ‘/**/and/**/4282=(select/**/4282/**/from/**/pg_sleep(15))/**/and/**/’zfdq’=’zfdq: What's the difference?

Which is correct: grcq or ‘/**/and/**/4282=(select/**/4282/**/from/**/pg_sleep(15))/**/and/**/’zfdq’=’zfdq

How to spell grcq?