Snowflake cloud data platform 在Snowflake中替换子查询

我不熟悉Snowflake SQL，并尝试将代码从Oracle SQL迁移到Snowflake SQL

我在Oracle中使用的子查询在Snowflake中不受支持，它给出了以下err-r

SQL编译错误：无法计算不支持的子查询类型

原始SQL查询-

select p."EMPLOYEE#" as Employee_ID,
 (select o."POSITION_NO" from ah_occupancy o where o."EMPLOYEE_NO" = p."EMPLOYEE#" and o."JOB_NO" = p."JOB#" and p."WORKDATE" between o."PORTION_START" and o."PORTION_END") as Position_ID,
    j."COMPANY_CODE",
    date(p."WORKDATE") as Work_Date,
    p."UNIT" as Calculated_Quantity,
    p."PAYCODE"
from
    "ODS"."HRIS"."PEPAYTRAN" p, job j
where p."EMPLOYEE#" =j."EMPLOYEE#"
    and p."JOB#" = j."JOB#"
    and date( p."WORKDATE") between '2021-02-04' and '2021-02-10'-->='11-FEB-2021'
    and p."ORIGIN" not in ('RC101','FC801','WK8276')
    and p."PAYCODE" not in ('GPPL', 'CLAMS')
    and p."PAYCODE" not like 'JK%'
    and p."TP" >= '01-JAN-2021'
    and nvl(p."BATCH#",' ') not in ('MUHTSL','MUHTS','ICWTS','RDOAC','NU011','1')) ;

我重新定义了查询，它编译并给出了相同数量的记录，任何人都可以查看代码并进行注释，如果相同或不正确，请对其进行注释

select p."EMPLOYEE#" as Employee_ID,
    o.position_no as Position_ID,
    j."COMPANY_CODE",
    date(p."WORKDATE") as Work_Date,
    p."UNIT" as Calculated_Quantity,
    p."PAYCODE"
from
    "ODS"."HRIS"."PEPAYTRAN" p,  "ODS"."HRIS"."JOB" j, "ODS"."HRIS"."AH_OCCUPANCY" o
where p."EMPLOYEE#" =j."EMPLOYEE#"
    and p."JOB#" = j."JOB#"
    and date( p."WORKDATE") between '2021-02-04' and '2021-02-10'-->='11-FEB-2021'
    and p."ORIGIN" not in ('RC101','FC801','WK8276')
    and p."PAYCODE" not in ('GPPL', 'CLAMS')
    and p."PAYCODE" not like 'JK%'
    and p."TP" >= '01-JAN-2021'
    and nvl(p."BATCH#",' ') not in ('MUHTSL','MUHTS','ICWTS','RDOAC','NU011','1')
    and o."EMPLOYEE_NO" = p."EMPLOYEE#" and o."JOB_NO" = p."JOB#" and p."WORKDATE" between o."PORTION_START" and o."PORTION_END"

---

这两个查询是等价的。通过运行以下查询，可以检查两者是否返回相同的信息：

--original query
select 
   p."EMPLOYEE#" as Employee_ID,
   (select 
      o."POSITION_NO" 
   from 
      ah_occupancy o 
   where 
      o."EMPLOYEE_NO" = p."EMPLOYEE#" 
      and o."JOB_NO" = p."JOB#" 
      and p."WORKDATE" between o."PORTION_START" and o."PORTION_END"
   ) as Position_ID,
   j."COMPANY_CODE",
   date(p."WORKDATE") as Work_Date,
   p."UNIT" as Calculated_Quantity,
   p."PAYCODE"
from
    "ODS"."HRIS"."PEPAYTRAN" p, 
    job j
where 
   p."EMPLOYEE#" =j."EMPLOYEE#"
   and p."JOB#" = j."JOB#"
   and date( p."WORKDATE") between '2021-02-04' and '2021-02-10'-->='11-FEB-2021'
   and p."ORIGIN" not in ('RC101','FC801','WK8276')
   and p."PAYCODE" not in ('GPPL', 'CLAMS')
   and p."PAYCODE" not like 'JK%'
   and p."TP" >= '01-JAN-2021'
   and nvl(p."BATCH#",' ') not in ('MUHTSL','MUHTS','ICWTS','RDOAC','NU011','1')) ;
minus
--new query
select 
   p."EMPLOYEE#" as Employee_ID,
   o.position_no as Position_ID,
   j."COMPANY_CODE",
   date(p."WORKDATE") as Work_Date,
   p."UNIT" as Calculated_Quantity,
   p."PAYCODE"
from
    "ODS"."HRIS"."PEPAYTRAN" p,  
    "ODS"."HRIS"."JOB" j, 
    "ODS"."HRIS"."AH_OCCUPANCY" o
where 
   p."EMPLOYEE#" =j."EMPLOYEE#"
   and p."JOB#" = j."JOB#"
   and date( p."WORKDATE") between '2021-02-04' and '2021-02-10'-->='11-FEB-2021'
   and p."ORIGIN" not in ('RC101','FC801','WK8276')
   and p."PAYCODE" not in ('GPPL', 'CLAMS')
   and p."PAYCODE" not like 'JK%'
   and p."TP" >= '01-JAN-2021'
   and nvl(p."BATCH#",' ') not in ('MUHTSL','MUHTS','ICWTS','RDOAC','NU011','1')
   and o."EMPLOYEE_NO" = p."EMPLOYEE#" 
   and o."JOB_NO" = p."JOB#" 
   and p."WORKDATE" between o."PORTION_START" and o."PORTION_END"

您还可以尝试以下同样等效的查询：

select 
   p."EMPLOYEE#" as Employee_ID,
   o.position_no as Position_ID,
   j."COMPANY_CODE",
   date(p."WORKDATE") as Work_Date,
   p."UNIT" as Calculated_Quantity,
   p."PAYCODE"
from
    "ODS"."HRIS"."PEPAYTRAN" p
    inner join  "ODS"."HRIS"."JOB" j
       on (p."EMPLOYEE#" =j."EMPLOYEE#"
           and p."JOB#" = j."JOB#")
    inner join "ODS"."HRIS"."AH_OCCUPANCY" o
       on (o."EMPLOYEE_NO" = p."EMPLOYEE#" 
           and o."JOB_NO" = p."JOB#" 
           and p."WORKDATE" between o."PORTION_START" and o."PORTION_END"  )
where 
   date( p."WORKDATE") between '2021-02-04' and '2021-02-10'-->='11-FEB-2021'
   and p."ORIGIN" not in ('RC101','FC801','WK8276')
   and p."PAYCODE" not in ('GPPL', 'CLAMS')
   and p."PAYCODE" not like 'JK%'
   and p."TP" >= '01-JAN-2021'
   and nvl(p."BATCH#",' ') not in ('MUHTSL','MUHTS','ICWTS','RDOAC','NU011','1')

---

如果新版本的查询运行并产生正确的结果，您面临的问题和您提出的问题是什么？我希望有人检查这两个代码，并检查它们在技术上是否相同。如果它们都产生相同的结果，那么它们在技术上是相同的