c++中hash_table以及std::map应用案例
代码重点是hash_table,附加std::map与其做对比,实现的是一条sql语句:select c_nationkey, c_mktsegment, count(*), max(c_acctbal) from aaa_customer_1g group by c_nationkey, c_mktsegment order by c_nationkey, c_mktsegment
代码重点是hash_table,附加std::map与其做对比,实现的是一条sql语句:select c_nationkey, c_mktsegment, count(*), max(c_acctbal) from aaa_customer_1g group by c_nationkey, c_mktsegment order by c_nationkey, c_mktsegment