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with your_table as (select 'TST_AB1_ABC123456_TEST' as txt1) select txt1, txt2 from your_table t1 cross apply (select charindex( '_', txt1) as i1) t2 cross apply (select charindex( '_', txt1, (i1 + 1)) as i2 ) t3 cross apply (select charindex( '_', txt1, (i2 + 1)) as i3 ) t4 cross apply (select substring( txt1,(i2+1), (i3-i2-1)) as txt2) t5
txt1
txt2
TST_AB1_ABC123456_TEST
ABC123456