Question

我正在尝试在sql下面创建一个表，并且该表已经运行了几天。

下面是sql。

create table I83094_Emnmt1 AS
    Select 
     'I83094'                                              AS Audit_Id
     ,rap01.plcy                                           AS plcy
     ,raa02.enddt_t                                        As enddt
     ,RPAD(NVU_GET_TERM_ID(RAP01.PLCY, Raa02.ENDDT_T),1)   AS Term_Id
     ,nvu_get_nxt_proc_enddt(RAP01.PLCY, Raa02.ENDDT_T)    As next_enddt
     ,exception_date                                       AS exception_date
     ,RAP07.MVRDT_t
     ,RAP07.MVRDT_s
     ,rap07a.prefdt_t
     ,RAP07.MRTLST
     ,RAP07.BRTHDT_T                                       AS BirthDate
     ,floor((tt.ja2_effdt_t - RAP07.BRTHDT_T)/365 )        AS Operator_Age
     ,rap07a.perseq
     ,tt.ja2_effdt_t                                       AS TERM_DATE
     ,rap01.j01_PT_LINE_cat_Cd                             AS j01_PT_LINE_cat_Cd
     ,rap01.j01_pt_cdb_part_id                             AS j01_pt_cdb_part_id
     ,Rap01.J01_Pt_State_Cd                                As J01_Pt_State_Cd
     ---
from RAP01
----
Join RAA02
  ON raa02.j46_pt_line_cat_cd  = rap01.j01_pt_line_cat_cd
AND raa02.j46_pt_cdb_part_id   = rap01.j01_pt_cdb_part_id
AND raa02.j46_pt_state_cd      = rap01.j01_pt_state_cd
AND raa02.plcy                 = rap01.plcy
AND raa02.sprodt_t  between '14-OCT-2013' AND '14-OCT-2018'
AND raa02.ahevnt               = '0993'
---
JOIN ewt_prama_term tt
  ON tt.ja2_pt_line_cat_cd     = rap01.j01_pt_line_cat_cd
AND tt.ja2_pt_cdb_part_id      = rap01.j01_pt_cdb_part_id
AND tt.ja2_pt_state_cd         = rap01.j01_pt_state_cd
AND tt.ja2_plcy                = rap01.plcy
and raa02.enddt_t              between tt.ja2_effdt_t and tt.ja2_expdt_t - 1
-----
JOIN rap07a
  ON rap07a.j36_pt_line_cat_cd = rap01.j01_pt_line_cat_cd
AND rap07a.j36_pt_cdb_part_id  = rap01.j01_pt_cdb_part_id 
AND rap07a.j36_pt_state_cd     = rap01.j01_pt_state_cd
AND rap07a.plcy                = rap01.plcy
--and RAP07a.perseq              = rap18.perseq
AND raa02.enddt_t  BETWEEN rap07a.prefdt_t AND (rap07a.dropdt_t  - 1)
----
JOIN RAP07
  ON  RAP07.J37_PT_LINE_CAT_CD =  rap01.j01_pt_line_cat_cd   
AND  RAP07.J37_PT_CDB_PART_ID  =  rap01.j01_pt_cdb_part_id  
AND  RAP07.J37_PT_STATE_CD     =  rap01.j01_pt_state_cd     
AND  rap07.plcy                =  RAP01.PLCY
AND  RAP07.perseq              =  rap07a.perseq
AND RAP07.MRTLST in ('MA','IC','DC','WC','EC','DP')
--AND RAP07.DRVDES_01 IN ('R','P')  
--AND RAP07.MVRDT_T < (select exception_date from I83094_exception)
AND floor((tt.ja2_effdt_t - RAP07.BRTHDT_T)/365) < 50
AND  raa02.enddt_t BETWEEN RAP07.enddt_t AND (RAP07.dropdt_t  - 1)
---
join I83094_exception exp
  ON exp.line_cd               = rap01.line3
AND exp.state_cd               = rap01.state
AND exp.company_cd             = rap01.co3
AND exp.marital_status_cd      = RAP07.MRTLST
---
WHERE Rap01.J01_Pt_Line_Cat_Cd = 'A'
AND Rap01.Line3               IN ('010','019')
AND RAP07.MVRDT_T < exp.exception_date;

字段“ J01_Pt_State_Cd”表示不同的状态，该表包含数十亿数据，并且将花费大量时间来执行。我尝试创建表，但必须等待2或3天。如何改善查询，以便在更短的时间内执行查询。

Answer 1

group by具有分组功能，例如sum，max，min和count。使用这些功能中的某些功能时，通常需要对某些属性的分组求和，例如sum(sales) group by vendor。

在没有分组功能的查询中使用此关键字时，其作用类似于distinct，但必须在分组依据中包括所有字段。

您得到的错误仅仅是，您没有将所有字段都包含在group by中。

Answer 2

我认为您误会了按表情分组。

根据您的评论，我认为您正在尝试对大量数据运行此操作，这需要花费很长时间。 group by不能解决这个问题，group by表达式用于汇总某些字段上的数据，例如，如果我想找出每个用户登录服务所花的时间，我可以在用户名上使用group by。 / p>

为了加快查询速度，我建议您使用标准的内容，请确保您的表为indexed properly，并确保所有这些连接都是必需的。

如何加快查询

2 个答案: