Question : SQL Query - Autonumbering with prefix

Hello experts,

I need help with a query. I created a query that will look at a part and take the prefix and then add 7 digit numbering after that which will auto increment from 1 to whatever it is with leading zeros. This works well, but then there's an issue where I need a condition. If the part item is a fabricated part, I want it to use whatever number is already there and pad it to 7 digit numbering. Below is an example:

These are all non-fabricated parts:

ABC1234 --> ABC0000001
ABC2123 --> ABC0000002
ABC398 --> ABC0000003
DBC32 --> DBC0000001
DBC45 --> DBC0000002

These are fabricated parts and should use the same numbering but pad to 7 characters:

ACDD2343 --> ACD0002343
ACDB2321 -->ACD0002321
BAC122 -->BAC0000122

Here's my original query:

SELECT SUBSTRING(ID, 1, 3) + REPLICATE(STR(ROW_NUMBER() OVER (PARTITION BY SUBSTRING(ID, 1, 3) ORDER BY SUBSTRING(ID, 1, 3)), 7), ' ', '0') AS NEW_ID
FROM PART

Now I need to take the same part, with the first 3 letter as prefix and then whatever numeric number with 7 digits long. Note that there are some part ID with 4 letters, it should only take the first 3 letter and then ignore whatever else. The 2nd part where it take the number should only be numeric and then make sure it pads it with leading zeros up to 7 digits long with a total of 10 digits. Example: ABC0001234

Answer : SQL Query - Autonumbering with prefix

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declare @t table ( ID varchar(20) )

insert into @t values ('ABC1234')
insert into @t values ('ABC2123')
insert into @t values ('ABC398')
insert into @t values ('DBC32')
insert into @t values ('DBC45')

insert into @t values ('ACDD2343')
insert into @t values ('ACDB2321')
insert into @t values ('BAC122')



SELECT ID, SUBSTRING(ID, 1, 3) p
, ROW_NUMBER() OVER (PARTITION BY SUBSTRING(ID, 1, 3) ORDER BY SUBSTRING(ID, 1, 3)) rn
, SUBSTRING(ID, 1, 3) + RIGHT( '000000000' +  
   CASE WHEN ID LIKE '[A-Z][A-Z][A-Z][0-9]%' 
   THEN SUBSTRING(REPLACE(ID,'-',''), 4, 100)
   ELSE SUBSTRING(REPLACE(ID,'-',''), 5, 100)
   END , 7 ) x
FROM @t