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Asked: 2026-05-11T03:10:51+00:00

I’m trying to find out the best practice when removing characters from the start

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I’m trying to find out the best practice when removing characters from the start of a string.

In some languages, you can use MID without a length parameter however, in TSQL the length is required.

Considering the following code, what is the best practise? (The hex string is variable length)

DECLARE @sHex VARCHAR(66) SET @sHex = '0x7E260F3DA734AD4BD816B88F485CE501D843DF067C8EDCB8AC7DAD331852E04D'  PRINT RIGHT(@sHex,LEN(@sHex) -2) PRINT SUBSTRING(@sHex,3,LEN(@sHex) -2) PRINT SUBSTRING(@sHex,3,65535)
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  1. Well, the first is more expressive of your intent. The last is clearly messy (hard-coded length etc). I doubt you’d find much performance difference between the first & second, so I’d use the simplest – RIGHT.

    Of course, if you are doing this lots, you could write a udf that encapsulates this – then if you change your mind you only have one place to change…

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