SELECTt1.emp_id,t1.emp_name,t1.hire_date,t2.dept_nameFROMemployeesASt1INNERJOINdepartmentsASt2ONt1.dept_id=t2.dept_idORDERBYemp_id; 提示:連線表時,在每個列名前加上它所屬的表的名稱(例如employees.dept_id,departments.dept_id或者t1.dept_id,t2.dept_id如果你使用表別名的話),以避免在不同表...
now_path = os.path.join(root_path, folder_name) feature_val = fn_feature(now_path) vals = np.concatenate((feature_val, vals), axis=0)ifvalsisnotNoneelsefeature_val id_np = np.asarray([idx] * feature_val.shape[0]) ids = np.concatenate((id_np, ids), axis=0)ifidsisnotNoneels...