Variables in Query Builder

When I'm writing a query using SQL, I can introduce variables with the {{...}} syntax. This allows me, for example, to reuse the same variable multiple times inside my query.

Is it possible to introduce a variable (with its input filter) also when using the Query Builder? Or in this case can I only use filters?

You can convert the questions to SQL and add your variables.

When using the QueryBuilder, the option is at the bottom right.
Version: 0.52.1