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Connecting PostgreSQL from R using RdbiP …
sites de namoro yahoo Connecting PostgreSQL from R using RdbiPgSQL library(RdbiPgSQL) conn
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How to select the first/least/max row pe …
Pulivendla How to select the first/least/max row per group in SQL A nice explanation about the subject. Easy to understand. http://www.xaprb.com/blog/2006/12/07/how-to-select-the-firstleastmax-row-per-group-in-sql/
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Find duplicates in MySQL SELECT col1, …
Find duplicates in MySQL SELECT col1, col2, count(col3) FROM t1 GROUP BY col1, col2 HAVING count(col3) > 1 Adapted from http://support.microsoft.com/default.aspx?scid=kb;en-us;139444