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Which statement is used to force the optimizer to use tables in a particular order?(a) FORCE INDEX(b) USE INDEX(c) IGNORE INDEX(d) STRAIGHT_JOIN |
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Answer» Right answer is (d) STRAIGHT_JOIN For explanation I would say: STRAIGHT_JOIN is used to force the optimizer to use tables in a particular order. The MySQL optimizer by default considers itself free to determine the order in which to scan tables most quickly. |
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