explain的id从小到大
时间: 2024-01-09 07:41:08 浏览: 45
在MySQL中,当使用explain语句时,结果中的id字段代表查询计划的顺序。这个id字段是按从小到大的顺序进行排列的,表示查询计划的执行顺序。它的作用是展示查询语句的执行计划,包括表的访问顺序、使用的索引、扫描的行数等信息。通过查看id字段的值,可以了解查询计划中每个步骤的执行顺序。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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