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Employee_M

City        Emp_Num_ID
Cleveland   2164445437/FTTD/JAMES, TYLER/139561151
Tokyo       1261120379/FTTD/BOYD, ADAMS/14468140  
Marakech    4049838896/FTTD/SMITH, TULY E/13956144
Houston     7980151429/FTTD/NEARY, HARTMAN/14215411

I'm trying to extract all digits after the third / with substring

select substr(Emp_Num_ID,/,10) as Emp_ID 
from Employee_M

sometimes we can have between 4 to 10 charterers after the third / so I chose 10 for the length.

any idea how to fix that.

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  • you can use instr function to get the position of last /
    -1 = you are looking from the end of the string
  • than you add 1, so you start position will be the first number after /
  • you do not need the third parameter in substr if you need substring till the end of a string

    select substr(Emp_Num_ID,instr(Emp_Num_ID,'/',-1)+1) as Emp_ID from Employee_M

| improve this answer | |
  • thanks it worked like a charm, but when I try to compare that with another field I'm getting an error. select substr(Emp_Num_ID,instr(Emp_Num_ID,'/',-1)+1) as Emp_ID from Employee_M where substr(Emp_Num_ID,instr(Emp_Num_ID,'/',-1)+1)=City I'm getting "ORA-01722: invalid number" anyway that I can use this against another field – Driven Apr 17 '19 at 23:02
  • i have just tested and it works =>fiddle. – hotfix Apr 18 '19 at 5:24
  • here is also an exmple what could cause the invalid number exception. you have to check your data – hotfix Apr 18 '19 at 5:33

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