Validating Inputs And Finding Patterns With PatIndex

---Checks that input only contains numbers
if PatIndex('%[^0-9]%','11') > 0
Begin
Print 'Not all numbers'
End
Else
Begin
Print 'All numbers'
End

---Checks that input only contains letters
if PatIndex('%[^a-z]%','aaaaa') > 0
Begin
Print 'Not all letters'
End
Else
Begin
Print 'All letters'
End


--Checking for mixed input
If PatIndex('%[^0-9][0-9]%','abc') > 0
Begin
Print 'Alpha numeric data'
End
Else
Begin
Print 'Either all numbers or all letters'
End

--Checks that value must start with a letter and a number
If PatIndex('[^0-9][0-9]%','A1anamwar11') > 0
Begin
Print 'Starts with a letter and a number'
End
Else
Begin
Print 'Does not start with a letter and a number'
End

--Checks that value must End with a letter and a number
If PatIndex('%[^0-9][0-9]','A1anamwar11a1') > 0
Begin
Print 'Ends with a letter and a number'
End
Else
Begin
Print 'Does not End with a letter and a number'
End


--Checks that value must Start with a letter and Ends with a number
If PatIndex('[^0-9]%[0-9]','namwar1') > 0
Begin
Print 'Starts with a letter and ends with a number'
End
Else
Begin
Print 'Does not start with a letter and ends with a number'
End

Namwar
<Link removed by georgev>