更好的解决方案，感谢 pmbAustin

Better solution, thanks to pmbAustin

@exclude_new_1 = COALESCE(@exclude1, '');

旧答案:

使用 case 语句设置新参数

Set new parameters with case statement

@exclude_new_1 = CASE WHEN (@exclude1 IS NULL) THEN '' ELSE @exclude1 END

在您的选择中使用新参数.应该做这份工作...

use the new parameters in your select. Should do the job...