sqlalchemy查詢：結果列名稱

Question

我有一個名為DevicesGpsTelemetry的模型（使用Declarative base聲明）。 我這樣查詢：

models = session.query(
    DevicesGps.ReceivedDateUtc, 
    DevicesGps.ReceivedTimeUtc,   
    DevicesGps.Latitude,                                 
    DevicesGps.Longitude)

它呈現為：

    SELECT   
    devices_gps."ReceivedDateUtc" AS "devices_gps_ReceivedDateUtc", 
    devices_gps."ReceivedTimeUtc" AS "devices_gps_ReceivedTimeUtc", 
    devices_gps."Latitude" AS "devices_gps_Latitude", 
    devices_gps."Longitude" AS "devices_gps_Longitude" 
        FROM devices_gps

我的問題：如何將AS語句之后的名稱（如"gps_telemetry_ReceivedDateUtc" ）更改為我想要的名稱？

背景：這些名稱對我來說很重要，因為我使用此查詢執行pandas.read_sql並且名稱成為DataFrame的列名

Answer 1

在每列之后添加.label('desired_name') 。 在你的情況下，它看起來像

models = session.query(
    DevicesGps.ReceivedDateUtc.label("gps_telemetry_ReceivedDateUtc"), 
    DevicesGps.ReceivedTimeUtc.label("gps_telemetry_ReceivedTimeUtc"),   
    DevicesGps.Latitude.label("gps_telemetry_Latitude"),                                 
    DevicesGps.Longitude.label("gps_telemetry_Longitude")
)