摘要： 11 Paris For the next thirty years the Duke and Duchess lived in Paris. They gave parties and travelled round the world, but they never went back to B 阅读全文

摘要： 1、关于 order by 这里牵涉到一个参数：sort_buffer_size，默认256KB。 可以更改这个参数，变成256MB show status like 'sort%' 注意这个状态：sort_merge_passes show global status like 'sort%' o 阅读全文