综合业务分析（完整业务周期）

def solve():
    import sqlite3
    import pandas as pd
    
    conn = sqlite3.connect(':memory:')
    
    base_url = 'https://liangdaima.com/static/data/crm/state_09/'
    
    tables = ['suppliers', 'customers', 'products', 
              'stock_in', 'stock_in_items', 
              'stock_out', 'stock_out_items']
    
    for table in tables:
        try:
            url = base_url + table + '.csv'
            df = pd.read_csv(url)
            df.to_sql(table, conn, index=False)
        except Exception as e:
            pass
    
    result = conn.execute('SELECT \'供应商数\' AS 维度, COUNT(*) AS 数量 FROM suppliers UNION ALL SELECT \'客户数\', COUNT(*) FROM customers UNION ALL SELECT \'商品数\', COUNT(*) FROM products UNION ALL SELECT \'入库单数\', COUNT(*) FROM stock_in UNION ALL SELECT \'出库单数\', COUNT(*) FROM stock_out UNION ALL SELECT \'入库总量\', SUM(数量) FROM stock_in_items UNION ALL SELECT \'出库总量\', SUM(数量) FROM stock_out_items').fetchall()
    conn.close()
    return result