1.我认为那是行不通的。您可以在不进行舒张测量的情况下进行收缩测量（例如，通过触诊而不是使用血压计测量血压），同一个表格记录了许多不同类型的结果。这个问题可能会使用一个标题，更多地是关于SQL，更少地是关于SQL的医学应用。@Graham Chiu标题和标

---

1.我认为那是行不通的。您可以在不进行舒张测量的情况下进行收缩测量（例如，通过触诊而不是使用血压计测量血压），同一个表格记录了许多不同类型的结果。这个问题可能会使用一个标题，更多地是关于SQL，更少地是关于SQL的医学应用。@Graham Chiu标题和标记都是用来表示问题的编程相关内容的。如果有人在看问题列表，标题比标签更明显，应该清楚地表达问题。这里的人不倾向于考虑与SQL相关的血压管理。这假设每位患者每天只有一次血压测量。不，它只假设最后一次就诊是

max（rdate）

。如果根据提供的信息，每次访问都有多个读数，我们无法决定选择哪一个，他会得到多个读数。它将显示任何适用的选项，因此如果在同一次就诊中有3个收缩和3个舒张，那么所有6行都将返回。@JNK，我想您已经找到了。我想有两个

r1

引用应该是

R

。我在Firebird'SQL error code=-206 Column unknown R2.RVALUE'中得到了一个SQL语法错误。我怀疑这个查询还返回了患者上一次血压良好的日期。我尝试了这个查询，但我认为它给出了他们上一次血压正常的日期，但我想知道他们上次来的时候他们的血压是否正常。所以，如果他们一年前有一个很好的阅读，昨天来了，他们的血压不正常，它返回了一年前的日期

patient integer
rdate date
rvalue integer
rtype vchar

select patient, max(rdate) as maxdate 
from results 
where rtype = 'systolic' and rvalue > 0 
group by patient

select r.patient, max(r.rdate) as maxdate 
FROM results as R
INNER JOIN results as R2 ON r2.Patient=r.patient AND r.rdate=r2.rdate
WHERE r.type='systolic' and r.rvalue BETWEEN 0 and 140
AND r2.type='diastolic' and r2.rvalue BETWEEN 0 and 90
GROUP BY r.patient

SELECT patient, MAX(rdate) AS max_rdate
FROM (
     SELECT patient, rdate, MIN(CASE WHEN RTYPE = 'systolic'  THEN rvalue END) AS min_systolic, 
        MIN(CASE WHEN RTYPE = 'diastolic' THEN rvalue END) AS min_diastolic
    FROM BPResults
    GROUP BY patient, rdate
    ) AS results
WHERE min_systolic < 140
    AND min_diastolic < 90
GROUP BY patient

select patient, max(rdate) as ldate from digital 
where rtype = 'Diastolic' and  RDATE between (?) and (?) 
group by patient

intersect

select patient, rdate as ldate from digital 
where rtype = 'Diastolic' and RDATE between (?) and (?) 
and rvalue < 90

intersect 

select patient, rdate as ldate as digital where rtype = 'Systolic'  and

select     dia.patient       as patient   
     ,     dia.rdate         as bp_date   
     , min(dia.rvalue)       as dia_bp          -- best dia bp for that date
     , min(sys.rvalue)       as sys_bp          -- best sys bp for that date
  from results  dia
     , results  sys 
 where dia.patient            = sys.patient
   and dia.rdate              = sys.rdate       -- both bp on same date
   and dia.rtype              = 'diastolic'
   and sys.rtype              = 'systolic'
 group by dia.patient
        , dia.rdate
  having min(dia.rvalue)     <   90             -- under 90 bp
     and min(sys.rvalue)     <  140             -- under 140 bp
     and dia.rdate            =                 -- and that date is
       ( select max(lst.rdate)                  -- the last date
           from results   lst
          where lst.patient   = dia.patient     -- for that patient
            and lst.rtype    in ( 'diastolic'   -- with a bp row
                                , 'systolic' ) )

select     bp.patient   
     ,     bp.rdate                              -- the latest bp date
     ,     bp.rtype   
     , min(bp.rvalue)                            -- best bp for that date
  from results    bp 
 where bp.rtype   in ('diastolic', 'systolic')
   and bp.rdate    =                             -- and the bp date is
     ( select max(lst.rdate)                     -- the last bp date 
         from results  lst                   
        where lst.patient  = bp.patient          -- for that patient
          and lst.rtype   in ( 'diastolic'       -- in which there is a bp row
                             , 'systolic' ) )
 group by bp.patient
        , bp.rdate
        , bp.rtype
   having (    min(bp.rvalue)    <   90          -- under 90 bp
           and     bp.rtype       = 'diastolic') -- when diastolic
       or (    min(bp.rvalue)    <  140          -- or under 140 bp
           and     bp.rtype       = 'systolic' ) -- when systolic