Question

我正在研究Postgres，以下查询似乎永远不会完成执行，但它只是导致问题的最终OR，如果我将其注释掉它运行正常。只是它是一种低效的写作方式吗？如果是这样，我就无法想到另一种选择。

SELECT a.subject_id, a.hadm_id, a.admittime, d.icd9_code, l.short_title, d.seq_num
FROM mimiciii.admissions a
INNER JOIN mimiciii.diagnoses_icd d
ON  a.subject_id = d.subject_id
AND a.hadm_id = d.hadm_id
INNER JOIN mimiciii.d_icd_diagnoses l
ON d.icd9_code = l.icd9_code
WHERE a.subject_id IN
    (SELECT DISTINCT d.subject_id
     FROM mimiciii.diagnoses_icd d
     WHERE d.icd9_code BETWEEN '390%' and '459%')
     AND d.icd9_code NOT IN 
     (SELECT d.icd9_code
         FROM mimiciii.diagnoses_icd d
         WHERE d.icd9_code BETWEEN 'V01%' AND 'V91%'
         OR d.icd9_code BETWEEN 'E000%' AND 'E999%'
         OR d.icd9_code BETWEEN '630%' AND '679%'
         OR d.icd9_code BETWEEN '760%' AND '999%'
          )
ORDER BY subject_id, admittime

Answer 1

也许有一个原因它永远不会完成执行，因为BETWEEN的过滤器所有都排除了。您不能将通配符与BETWEEN一起使用。

整个子查询似乎没必要。你可以删除它。试试这个where条款：

WHERE a.subject_id IN (SELECT d.subject_id
                       FROM mimiciii.diagnoses_icd d
                       WHERE d.icd9_code >= '390' and 
                             d.icd9_code < '460'
                      )

如果代码与此匹配，那么它与您的其他条件不符。

我怀疑查询还有其他问题，但这个问题很明显。

Answer 2

SELECT a.subject_id, a.hadm_id, a.admittime, d.icd9_code, l.short_title, d.seq_num
FROM mimiciii.admissions a
INNER JOIN mimiciii.diagnoses_icd d
ON  a.subject_id = d.subject_id
AND a.hadm_id = d.hadm_id
INNER JOIN mimiciii.d_icd_diagnoses l
ON d.icd9_code = l.icd9_code
WHERE a.subject_id IN
    (SELECT DISTINCT d.subject_id
     FROM mimiciii.diagnoses_icd d
     WHERE d.icd9_code BETWEEN '390%' and '459%')
     AND d.icd9_code NOT IN 
     (SELECT d.icd9_code
         FROM mimiciii.diagnoses_icd d
         WHERE (d.icd9_code BETWEEN 'V01%' AND 'V91%')
         OR (d.icd9_code BETWEEN 'E000%' AND 'E999%')
         OR (d.icd9_code BETWEEN '630%' AND '679%')
         OR (d.icd9_code BETWEEN '760%' AND '999%')
          )
ORDER BY subject_id, admittime

您可以尝试（尚未测试）使用括号来命令子查询，在这种情况下，它将先评估括号，然后运行OR语句来收集数据以提供给外部查询。

Answer 3

为什么需要一个子查询？

这不会回报你想要的东西吗？

SELECT a.subject_id, a.hadm_id, a.admittime, d.icd9_code, l.short_title,     d.seq_num
FROM mimiciii.admissions a
INNER JOIN mimiciii.diagnoses_icd d
ON  a.subject_id = d.subject_id
AND a.hadm_id = d.hadm_id
INNER JOIN mimiciii.d_icd_diagnoses l
ON d.icd9_code = l.icd9_code

WHERE  d.icd9_code BETWEEN '390%' and '459%' 
and not (d.icd9_code BETWEEN 'V01%' AND 'V91%') 
and not (d.icd9_code BETWEEN 'E000%' AND 'E999%')
and not (d.icd9_code BETWEEN '630%' AND '679%')
and not (d.icd9_code BETWEEN '760%' AND '999%')     
ORDER BY subject_id, admittime

或者我错了？

SQL多个OR BETWEENS

3 个答案: