说明：  T-SQL程序设计创建一名为Student_name的局部变量，并在select语句中使用该变量查找“张强”同学所选课程的成绩情况，给出相应的语句段和运行结果。
(T-SQL programming is Student_name create a local variable and use that variable in the select statement to find " Qiang" achievement situations students selected course, given the appropriate sentence segments and operating results.)