12.1 Good code is self-documenting 好的代码可以自我记录 12.1 Good code is self-documenting 好的代码可以自我记录 Some people believe that if code is written well, it is so obvious that no comments ...
1.9、ntile(分组数量)—让所有记录尽可以的均匀分布 1.9、ntile(分组数量)—让所有记录尽可以的均匀分布 postgres =# select ntile ( 2 ) over ( partition by begincity order by id ),* from bills ; ntile | ...
Updating Existing Records—Another Use for WHERE(更新已有的记录——WHERE 再战江湖) Updating Existing Records—Another Use for WHERE(更新已有的记录——WHERE 再战江湖) Now that you’ve got nice generalized s...