我正在尝试根据价格数据筛选股票列表。老实说，我真的不知道我在做什么，所以任何帮助都是非常感谢的。我会直奔主题。基本上，这个提示

select * from (
            select symbol, name, stock_id, max(close), date
            from stock_price join stock on stock.id = stock_price.stock_id
            group by stock_id
            order by symbol
        ) where date = '2021-04-01'

在DB浏览器（SQLite）中运行良好。在应用程序中，我希望它作为一个过滤器“新收盘高”工作：

import sqlite3, config
from fastapi import FastAPI, Request
from fastapi.templating import Jinja2Templates
from datetime import date

app = FastAPI()
templates = Jinja2Templates(directory="templates")

@app.get("/")
def index(request: Request):
    stock_filter = request.query_params.get('filter', False)

    connection = sqlite3.connect(config.DB_FILE)
    connection.row_factory = sqlite3.Row
    cursor = connection.cursor()

    if stock_filter == 'new_closing_highs':
        cursor.execute("""
        select * from (
            select symbol, name, stock_id, max(close), date
            from stock_price join stock on stock.id = stock_price.stock_id
            group by stock_id
            order by symbol
        ) where date = ?
        """, (date.today().isoformat(),))

    else: 
        cursor.execute("""
            SELECT id, symbol, name FROM stock order by symbol
        """)

    rows = cursor.fetchall()

    return templates.TemplateResponse("index.html", {"request": request, "stocks": rows})

@app.get("/stock/{symbol}")
def index(request: Request, symbol):
    connection = sqlite3.connect(config.DB_FILE)
    connection.row_factory = sqlite3.Row
    cursor = connection.cursor()

    cursor.execute("""
        SELECT id, symbol, name FROM stock WHERE symbol = ?
    """, (symbol,))

    row = cursor.fetchall()

    cursor.execute("""
        SELECT *FROM stock_price WHERE stock_ID = ? ORDER BY date DESC
    """, (row['id'],))

    prices = cursor.fetchall()

    return templates.TemplateResponse("stock_detail.html", {"request": request, "stock": row, "bars": prices})

如果过滤器没有在代码中定义，它会跳回到所有股票，但它却显示了一个空表，我不知道为什么。
到目前为止，数据库有两个表：库存，包括Alpaca API提供的所有可交易的活跃资产：

id  symbol  name                                     Exchange
65  AAA     AAF First Priority CLO Bond ETF          ARCA
66  AAAU    Goldman Sachs Physical Gold ETF Shares   ARCA

和股票价格：

id stock_id    date      open    high    low     close  volume
1   65      2020-10-02  24.9127 24.925  24.9127  24.92  2944
2   65      2020-10-05  24.91   24.94   24.91    24.92  29000
3   65      2020-10-06  24.89   24.91   24.89    24.91  4019
4   65      2020-10-07  24.9017 24.91   24.9     24.91  3800
5   65      2020-10-08  24.9    24.905  24.9     24.9   1534
6   65      2020-10-09  24.88   24.91   24.88    24.89  16273

请让我知道，如果我没有提供足够的信息在这里。非常感谢您抽出时间