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2025-01-17 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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Use in in mysql,if the field is indexed,the index is still useful,but when the data quantity is small relative to the param in "in" parentheses,mysql optimizer will use ALL TABLE SCAN instead.
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Continue with the installation of the previous hadoop.First, install zookooper1. Decompress zookoope
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