<div dir="ltr">Hello list,<div><br></div><div>I know this may sound weird and I understand that what follows might be considered as out of scope but I'd like your opinions on this.</div><div><br></div><div>I've just seen a new comment to FR <font face="arial, sans-serif"> #1007 and it got me thinking about the SQL concept of primary and secondary key (where the latter is linked to the primary key of another table). Again, this is a pure speculation post. I just wanted your opinions about having such features in R (via data.table)</font></div>
<div><font face="arial, sans-serif"><br></font></div><div><font face="arial, sans-serif">Thanks,</font></div><div><br></div><div>Michele.</div><div><p><span style="color:rgb(102,102,102)"><span style="font-size:10pt"><a href="http://www.evolve-analytics.com" target="_blank"><br>
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