Splitting a column on underscores
i usually say to people don't save data with any delimiter


CREATE TABLE [test] (JOBNUMBR VARCHAR(15))
GO




INSERT INTO test SELECT '57299_87961_003' UNION SELECT '66515_88567_OOO' UNION SELECT '58OO7_88695_OO1'
GO




SELECT JOBNUMBR
,Reverse(ParseName(Replace(Reverse(JOBNUMBR), '_', '.'), 1)) As [no1]
,Reverse(ParseName(Replace(Reverse(JOBNUMBR), '_', '.'), 2)) As [no2]
,Reverse(ParseName(Replace(Reverse(JOBNUMBR), '_', '.'), 3)) As [no3]
FROM (Select newid() AS [ID], JOBNUMBR from test) As [t]
GO


JOBNUMBR        | no1   | no2   | no3
:-------------- | :---- | :---- | :--
57299_87961_003 | 57299 | 87961 | 003
58OO7_88695_OO1 | 58OO7 | 88695 | OO1
66515_88567_OOO | 66515 | 88567 | OOO


db&lt;&gt;fiddle here