查询指令_内存溢出

mysql

MySQL explain获取查询指令信息原理及实例

explain用于获取查询执行计划信息，一、语法只需要在select前加上explain即可，如：mysql> explain select 1;+----+-------------+-------+------------+

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2022-5-14
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File: /www/wwwroot/outofmemory.cn/tmp/view_template_wqo_wpcom_htm_tag.htm, Line: 137, array_keys()
File: /www/wwwroot/outofmemory.cn/tmp/route_tag.php, Line: 115, include(/www/wwwroot/outofmemory.cn/tmp/view_template_wqo_wpcom_htm_tag.htm)
File: /www/wwwroot/outofmemory.cn/tmp/index.inc.php, Line: 174, include(/www/wwwroot/outofmemory.cn/tmp/route_tag.php)
File: /www/wwwroot/outofmemory.cn/index.php, Line: 30, include(/www/wwwroot/outofmemory.cn/tmp/index.inc.php)

MySQL explain获取查询指令信息原理及实例