The "`[]`" operator is not available to SQLite. Microsoft SQL Server uses square brackets to quote identifiers. For example, instead of `"columnname"` they write `[columnname]`. This is not standard SQL, but it is *extremely* common among programmers who first learned SQL from SQL Server. SQLite provides square-bracket quoting too, for compatibility with SQL Server, and has for 20 years. Hence, we cannot use `[]` as an operator.