Question

I have a string LCD32W58. In this string I want substring until I get number
e.g. LCD32W58 --> LCD

If the string contains numeric at beginning then I want numbers until character start
e.g. 55LM9600 --? 55

Answer 1

you can use something like this

if @nString like '[0-9]%'
    select @Result = left(@nString, patindex('%[A-Za-z]%', @nString) - 1)
else if @nString like '[A-Za-z]%'
    select @Result = left(@nString, patindex('%[0-9]%', @nString) - 1)

you can also use numbers and not numbers style

if @nString like '[0-9]%'
    select @Result = left(@nString, patindex('%[^0-9]%', @nString) - 1)
else
    select @Result = left(@nString, patindex('%[0-9]%', @nString) - 1)