McqMate
Q. |
For a table having 4 columns, the number of columns to which hash function is applied when using hash indexes is |
A. | 1 |
B. | 2 |
C. | 3 |
D. | 4 |
Answer» D. 4 | |
Explanation: in mysql, for the hash indexes, a hash function is applied to each of the column values. the resulting hash values are stored in the index and used to perform lookups on it. |
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