building cost index

基本解释

In fact, for the last -this is the Engineering News-Record Building Cost Index; it's an index used by people in the construction industry.
实际上,在过去,这是ENR建筑成本指数,Engineering News-Record简称ENR是美国建筑行业的周刊杂志是建筑行业使用的指数
If the inner table does not have an index, the database server will compare the cost of building an index on the table to the cost of a sequential scan, and will choose the one with the least cost.
如果内部表没有索引，那么数据库服务器就会将在表上构建索引的成本与连续扫描的成本进行比较，然后选择成本最低的那一种方法。