深度学习信道估计:从CNN/U-Net模型到无线通信系统性能优化
2026/9/4 2:33:29
在Athena数据库中,使用json_extract_scalar函数对某个json字段进行过滤和分组统计。
SELECTJSON_EXTRACT_SCALAR(all_json,'$["properties"]["$latest_utm_medium"]')as"latest_utm_medium",COUNT(*)asrecord_countFROMgule_tableWHEREevent='$MPViewScreen'ANDJSON_EXTRACT_SCALAR(all_json,'$["properties"]["$url_path"]')='pages/thirdPartner/page'ANDJSON_EXTRACT_SCALAR(all_json,'$["properties"]["$url_query"]')LIKE'%id=%'AND"date">=DATE('2025-12-04')AND"date"<=DATE('2025-12-07')GROUPBYJSON_EXTRACT_SCALAR(all_json,'$["properties"]["$latest_utm_medium"]')ORDERBYrecord_countDESC;