SQL Server: Proper way to order by name -

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i have query containing lines following: 

select    b.lastname + ', ' + b.firstname tm

currently use order tm in order sort, seems work.

however, in order right, can tell me correct way here order tm?

order tm,   order b.tm,   order b.lastname + ', ' + b.firstname

or else?

also, can tell me if need put tm in single quotes?

it seems work without quotes want make sure right. 

order tm

best way!

order b.tm,

no, tm not 1 of b's columns.

order b.lastname + ', ' + b.firstname

can done, first alternative easier.

qutes required reserved words, , identifiers including strange characters (incl space).


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