小编mac*_*007的帖子

我有这个小问题.我想将select语句的结果值检索到字符串变量中.像这样

OleDbCommand cmd1 = new OleDbCommand();
cmd1.Connection = GetConnection();
cmd1.CommandText = "SELECT treatment FROM appointment WHERE patientid = " + text;
cmd1.ExecuteNonQuery();

我希望将选定的处理值放入字符串变量中.我怎样才能做到这一点.谢谢

我有桌子

Department: id, name
Employee: id, departmentId, name, surname

departmentId是外键引用部门(id)查询:

SELECT * FROM Employee WHERE Employee.departmentId = Department.id;

返回错误"where子句中的未知列Department.id"

我不能发出这个错误.我该如何解决？

谢谢