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I noticed that I can write
SELECT CAST(Min(mynumber) AS VARCHAR(Max))+'mystring' AS X
as
SELECT CAST(Min(mynumber) AS VARCHAR)+'mystring' X
Will I regret leaving out the (Max) parameter?
When a varchar’s lenght is not specified in a data definition or variable declaration statement, the default length is 1. When it is not specified when using the CAST and CONVERT functions, the default length is 30.
See: char and varchar (Transact-SQL)
I feel that it is poor practice to code without specifying a length for varchar.