In the case of this example, you only have one parameter expected - the column expression - which will be one string.

在本例中，仅有一个参数(列表达式)，它将是一个字符串。

youdao

In the case of this example, you only have one parameter expected - the column expression - which will be one string.

在本例中，仅有一个参数(列表达式)，它将是一个字符串。

youdao