why put the $ charater to stringvalue name?

i found out some of string name have $ string prefix.

why they put the $ character to stringvaluename?

please advice.

Can you provide a little more context? Where exactly are you seeing the $? “Some string name” is too general.

If you use execSQl service, you will see rowCount updateCount at pipeline output value.

Ah. I believe $ is used to indicate “system” variables, but I’m not sure…