To reach the end of a varchar

i want to remove last character of my varchar variable.
is there any command as to reach a char of varchar. such as charAt() in java.
so, i have a varchar variable. and its last character is ','. i must remove it. how can i do this?
thanx

What if indeed? That's not how I read the sentence otherwise I wouldn't have suggested it.
To me it sounds like I have a trailing comma at the end of my string, how do I get rid of it?
Clearly the OP is Java orientated and the Java String class doesn't appear to have an equivalent of the LTRIM functions (it has a trim method but that doesn't take the character to trim as an argument, it only does whitespace).
So makes me think that he might not be know that's the question to ask, because they have no equivalent
But yes, it may be. We can only hope the OP comes back and tells us.

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To reach the end of a varchar

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