由 ORDER BY 编号 %1 标识的 SELECT 项包含一个变量，作为标识列位置的表达式的一部分。按照引用列名的表达式排序时，只允许使用变量。

The SELECT item identified by the ORDER BY number %1 contains a variable as part of the expression identifying a column position. Variables are only allowed when ordering by an expression referencing a column name.