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SELECT sum(numlog) FROM table1 WHERE date IN ( '12:04:2007', '12:05:20
+07', ... up to 500 odd dates)

SELECT sum(numlog) FROM table1 WHERE date >= 20071204 AND date < 20080
+112

SELECT sum(numlog) FROM table1 WHERE date IN ( '20071204', '20071205',
+ ... 30 days)