EXPLAIN关键字查看SQL语句的执行计划。对于查询SELECT * FROM users WHERE id = 1;，可以使用EXPLAIN SELECT * FROM users WHERE id = 1;来查看其执行计划。EXPLAIN关键字查看SQL语句的执行计划。对于查询SELECT * FROM users WHERE id = 1;，可以使用EXPLAIN SELECT * FROM users WHERE id = 1;来查看其执行计划。Powered By Z-BlogPHP 1.7.3