Suppose you're in a dark room and you're not sure who you're interacting with

[sqlQQ| SELECT 'hello world?' |]

This gives a FormatError because we're trying to split on the ?, even though the ? is not a parameter to substitute syntactically, but a character in the string.

We can work around this by providing the value as a query parameter:

[sqlQQ| SELECT #{PersistText "hello world?"} |]