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Comparing boxed Long values 127 and 128
...val1 = 127L;
Long val2 = 127L;
System.out.println(val1 == val2);
Long val3 = 128L;
Long val4 = 128L;
System.out.println(val3 == val4);
Outputs this:
true
false
For the 127L value, since both references (val1 and val2) point to the same object instance in memory (cached), it returns true...
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edited May 23 '17 at 12:25
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SQL query for finding records where count > 1
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350
Use the HAVING clause and GROUP By the fields that make the row unique
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