Can anyone explain the following results to me?
I am trying to find all values +/- 30% from a number...
value is declared as: | value | int(10) unsigned
Note that 1.3*63000 is 81900...
The first two are apparently correct:
mysql> SELECT count(*) FROM bench WHERE year = 95 and
-> value >= .7*63000 and value <= 1.3*63000 ;
+----------+
| count(*) |
+----------+
| 115 |
+----------+
1 row in set (0.10 sec)
mysql> SELECT count(*) FROM bench WHERE year = 95 and
-> value >= .7*63000 and value <= 81900 ;
+----------+
| count(*) |
+----------+
| 115 |
+----------+
1 row in set (0.08 sec)
These next two should give the same result, but...
mysql> SELECT count(*) FROM bench WHERE year = 95 and
-> value BETWEEN .7*63000 and 81900 ;
+----------+
| count(*) |
+----------+
| 47 |
+----------+
1 row in set (0.08 sec)
mysql> SELECT count(*) FROM bench WHERE year = 95 and
-> value BETWEEN .7*63000 and 1.3*63000 ;
+----------+
| count(*) |
+----------+
| 0 |
+----------+
1 row in set (0.08 sec)
Thanks
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