arg "" help="The new config value"
The correlation statistic tells the planner how closely the physical row order matches the column's sort order. A value near 1.0 means sequential access patterns - making index scan cheaper because the next row is likely on the same or adjacent page. For time-series data like created_at where rows are inserted chronologically, correlation is typically very high.，更多细节参见搜狗输入法
Accounts from that time, including my mum’s, emphasise that side of things much more than the dry economic account. One oral history from a secretary called Cynthia who worked from 1958 to 2005 mentions how, once, people used to knock at the door of the office – of course the manager had a separate office – and wait to be called. Then, suddenly, they started walking in because they wanted to speak to him directly. That is the world that computerisation helped to bring to an end, and now it is almost impossible to imagine it existed.。手游对此有专业解读
南方周末：还有其他什么建议吗？。业内人士推荐博客作为进阶阅读