How to delete records from table trade code that no have parent code value and parent code type ?

Question

1.80/5 (2 votes)

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I work on SQL server 2012 I need to delete rows that not have parent code type and parent code value from table Trade code

drop table #MappingCodeValue
drop table #TradeCode
create table #MappingCodeValue
 (
 id int identity (1,1),
 ParentCodeType  nvarchar(50),
 ParentCodeValue  nvarchar(50),
 ChildCodeType  nvarchar(50),
 ChildCodeValue  nvarchar(50)
 )
 INSERT INTO #MappingCodeValue
 (ParentCodeType,ParentCodeValue,ChildCodeType,ChildCodeValue)
 VALUES
 ('ECCS-US','AB123-US','ECCS-URB','AB123-URB'),
 ('ECCS-US','AB555-US','ECCS-URB','AB555-URB'),
 ('ECCS-US','AB666-US','ECCS-URB','AB666-URB'),
 ('ECCS-US','AB778-US','ECCS-URB','AB778-URB'),
 ('HTS-US','AB900-US','SCHEDUALB','AB900-URB')

 --select * from #MappingCodeValue
 CREATE TABLE #TradeCode
 (
 TradeCodeId int identity(1,1),
 PartId  int,
 CodeType  nvarchar(50),
 CodeValue nvarchar(50),
 PartDone  bit
 )
 insert into #TradeCode(PartId,CodeType,CodeValue,PartDone)VALUES
 (1222,'ECCS-US','AB123-US',null),
 (1255,'ECCS-US','AB555-US',null),
 (1222,'ECCS-URB','AB123-URB',1),
 (1255,'ECCS-URB','AB555-URB',1),
 (1444,'ECCS-URB','AB666-URB',1),
 (1931,'ECCS-URB','AB778-URB',1),
 (7000,'ECCS-URB','AB778-URB',1),
 (8000,'ECCS-URB','AB778-URB',1),
 (800,'SCHEDUALB','AB900-URB',1),
 (900,'SCHEDUALB','AB900-URB',1),
 (1255,'HTS-US','AB900-US',null),
 (909,'HTS-US','AB900-US',null)

3 and 4 not deleted because every part have code type from and code value from is mapping
and is correct
so i will not delete
it is generated from this lines

('ECCS-US','AB123-US','ECCS-URB','AB123-URB'),
('ECCS-US','AB555-US','ECCS-URB','AB555-URB'),

so part have two side from and to so i will not delete
i will delete parts that have from and have to
so it is not have parent to give me result
but records or parts have parent and also child will not delete
and this apply on 3 and 4

Expected Result after delete is

TradeCodeId	PartId	CodeType	CodeValue	PartDone
1	                1222	ECCS-US	        AB123-US	null
2	                1255	ECCS-US	        AB555-US	null
3	                1222	ECCS-URB	AB123-URB	  1
4	                1255	ECCS-URB	AB555-URB	  1
11	                1255	HTS-US	        AB900-US	null
12	                909	HTS-US	        AB900-US	null

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What I have tried:

SQL

;with mycte as (
 select Partid from #TradeCode t where PartDone=1
 group by Partid 
having (count(*)=1)
)

delete t 
from  #TradeCode t 
join mycte m on m.Partid=t.Partid


select * from #TradeCode

Posted 13-Apr-20 16:03pm

ahmed_sa

Updated 15-Apr-20 1:29am

v2

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Comments

Richard Deeming 14-Apr-20 8:56am

Once again, absolutely unclear.

Why are records 3 and 4 still in your "expected output"? There are no records in #MappingCodeValue where the ParentCodeType and ParentCodeValue match the CodeType and CodeValue for those records.

Edit your question and explain the precise relationship between these tables, and the precise conditions for deciding whether or not you keep the record.

2 solutions

Solution 1

Pardon me, I have no SQL editor near me but the query will look roughly as below

SQL

delete from #TradeCode as t
  left join #MappingCodeValue as m
  on (t.codetype = m.parentcodetype) and (t.codevalue = m.parentcodevalue)
where m.parentcodetype is null and m.parentcodevalue is null

The trick is that left join allows to select those values that do not have matching parentcodes in #MappingCodeValue table

Posted 14-Apr-20 0:26am

Bohdan Stupak

Comments

ahmed_sa 14-Apr-20 7:15am

thank you for reply it is not give me correct result
remaining record number 5 and 6
as link
https://www.mediafire.com/view/7vjbonu46astw64/DataSheet.png/file
i do
delete t from #TradeCode t
left join #MappingCodeValue as m
on (t.codetype = m.parentcodetype) and (t.codevalue = m.parentcodevalue)
where m.parentcodetype is null and m.parentcodevalue is null
select * from #TradeCode

TradeCodeId PartId CodeType CodeValue partlevel PartDone
1 1222 ECCS-US AB123-US 0 NULL
2 1255 ECCS-US AB555-US 0 NULL
11 1255 HTS-US AB900-US 0 NULL
12 909 HTS-US AB900-US 0 NULL

ahmed_sa 14-Apr-20 9:13am

I modify my original post if any more details i will explain to you

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ahmed_sa · Accepted Answer · 2020-04-15T01:30:00

I solved using this code
--match CodeValue and ParentCodeValue?

SQL

;with cte1 as(
select t.TradeCodeId ,t.PartId ,t.CodeType ,t.CodeValue ,t.PartDone ,m.ParentCodeValue  from #TradeCode t
left join #MappingCodeValue m
on t.CodeValue  =m.ParentCodeValue 
),
cte2 as(
select TradeCodeId ,PartId ,CodeType ,CodeValue ,PartDone from cte1 where PartId in(
select Partid from #TradeCode 
group by Partid 
having count(PartId)=1)
and PartDone =1
and ParentCodeValue is null
)
delete t 
from  #TradeCode t 
join cte2 m on m.Partid=t.Partid

thanks