题解 | #对emp_no字段创建索引idx_emp_no#
针对上面的salaries表emp_no字段创建索引idx_emp_no
https://www.nowcoder.com/practice/f9fa9dc1a1fc4130b08e26c22c7a1e5f
select * from salaries force index(idx_emp_no) where emp_no = '10005'
强制索引 force index(idx_字段名1)
针对上面的salaries表emp_no字段创建索引idx_emp_no
https://www.nowcoder.com/practice/f9fa9dc1a1fc4130b08e26c22c7a1e5f
select * from salaries force index(idx_emp_no) where emp_no = '10005'
强制索引 force index(idx_字段名1)
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