Oracle 需要帮助来优化下面的查询吗

-前

---

查询相当长，语法不是最好的，因此很难对其进行分析

我的建议是： 1.在子查询中去掉t.sicovam的子查询在主查询中使用相同的表，所以应该能够在正常的where条件下获得结果。 2.第二个问题是like和or的组合

---

如果您需要更多帮助，请将查询改写为更好的联接语法，发布表架构，并简要描述您希望实现的目标。

人们很难帮助您，因为首先您需要访问测试架构，其次我认为这是一个糟糕的问题。我尝试过设置查询的格式。如果你能让它的其余部分合理地可读，那会有所帮助。告诉我们查询计划是什么。告诉我们存在哪些索引。告诉我们跑步需要多长时间。告诉我们你的目标是什么。告诉我们桌子有多大。告诉我们哪些谓词是选择性的。现在，任何人都无法猜出什么东西可能会慢下来。

WITH pims AS
(
SELECT code, value 
  FROM T_QNT_EXT_INFO_TITRES 
 WHERE filter = 'PIMS' 
   AND key = 'INSTRUMENT'
),
generic_param_value as 
(
select value 
  from T_OPS_GENERIC_PARAM 
 where process='PIMSREC' 
   and field in('HBEU_ISSU_INC','HBEU_INV_INC', 
                'HBEU_TRADE_INC', 'HBAP_TRADE_INC')
)

 select t.sicovam, pims.value ,t.devisectt
    from titres t, 
         AUDIT_MVT a, 
         histomvts h, 
         pims     
    WHERE t.sicovam = pims.code 
    and pims.value is not null
    and t.affectation not in (4, 12)
    and t.type not in ('A','F','E','M') 
    and t.sicovam IN (SELECT DISTINCT nvl(h.sicovam, a.sicovam) 
                        FROM AUDIT_MVT a, histomvts h 
                       WHERE  a.refcon=h.refcon(+) 
                         AND a.DATEMODIF >= (SELECT MAX(MARKER_DATE) 
                                               FROM REMOTE_SECURITY.MARKERS 
                                              WHERE MARKER LIKE '%_SOPUS.%'               
                                                AND MARKER_DATE < TO_DATE('&2 10:00','YYYYMMDD HH:MI'))
                             AND a.DATEMODIF < (SELECT NVL(MIN(MARKER_DATE),SYSDATE) FROM REMOTE_SECURITY.MARKERS WHERE MARKER LIKE '%_SOPUS.%' AND MARKER_DATE > TO_DATE('&2 10:00','YYYYMMDD HH24:MI'))
                             AND EXISTS (select 1 from business_events b where decode(a.version,1,h.type,a.type)=b.id and (b.compta in (0,1) or b.id=15))
                             AND coalesce(a.hsbc_opcvm_upd, 0) <> 1  --mark a trade's modification if it's Drag and Drop 
                             AND decode(a.version,1,h.typesico,a.typesico) NOT IN (4)
                             AND exists (SELECT 1 FROM FOLIO, generic_param_value where ident=decode(a.state, 3, a.opcvm, h.opcvm) START WITH IDENT =generic_param_value.value
                                       CONNECT BY PRIOR IDENT = MGR) 
                      )        
    and not exists (SELECT 1 FROM T_QNT_EXT_INFO_TITRES t2 WHERE t2.CODE  = t.sicovam
                        and t2.filter = 'PIMS' 
                        and t2.KEY = 'TYPE'
                        and t2.VALUE in ('DPT', 'DFD/LBK')
                     )
    and (((pims.value like 'P%')
          and 
          ((t.affectation <>5) 
           OR 
           (t.affectation=5 and (exists(select 1 from histomvts where contrepartie= 10019816 and sicovam=t.sicovam) OR lower(t.libelle) LIKE '%fees linked to p%'))
          )
         )
         OR
         (pims.value not like 'P%')
        );