sql语句留置导尿上传收费超过实际住院天数

SQL语句通常用于数据库查询，用来筛选和操作数据。如果要检查某医疗系统的记录，是否存在患者留置导尿（可能表示有长期卧床等情况）并且相关的费用上传超过了他们实际住院的天数，可以编写类似这样的查询：

SELECT patient_id, 
       CASE 
           WHEN total_charges > actual_hospital_days * daily_charge_threshold THEN '费用超标'
           ELSE '费用正常'
       END as fee_status,
       total_charges,
       actual_hospital_days
FROM (
    SELECT patient_id, 
           SUM(charge_amount) as total_charges, 
           COUNT(*) as actual_hospital_days
    FROM admissions
    WHERE procedure = '留置导尿'
    GROUP BY patient_id, admission_date
) AS charges_info
JOIN patients ON charges_info.patient_id = patients.id
WHERE total_charges > (SELECT daily_charge_threshold FROM hospital_settings)

这个查询首先计算每个患者的总费用和实际住院天数，假设`admissions`表包含留置导尿的记录，然后将结果与`patients`表连接。`daily_charge_threshold`是从`hospital_settings`表获取的日均费用阈值。如果有记录显示费用超过这个阈值乘以实际住院天数，那么`fee_status`列会标记为“费用超标”。