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This topic has not been talked about, but often encountered in the work (although we do not necessarily realize), I also asked some of the boss of the business, whether or not to calculate the lifetime value of their customers, most of the answer is not thought of, in the work of Yili, also often encounter new passenger ratio, the cost of new customers and other

Indexes have a great impact on query performance, don't blindly create new indexes! Database high cost missing index, new required index based on statistics on dynamic performance view! Select C.name as library name, C.equality_columns, C.inequality_columns,c.included_columns, C.statement as table name, C.avg_total_user_cost as reduced average

Cost and performance of Oracle new-generation virtual computing All-in-One Machine To promote hardware sales, a new generation of integrated systems, including Oracle virtual computing All-in-One OVCA, and other integrated devices, were launched after Oracle's core dual-slot server market. At this point, Oracle first focuses on high-end and more professional int

Vista has been released for 8 months, but both consumers and corporate users seem to be sitting still, waiting for Vista SP1 to be released, so the system will be more secure and more compatible. In this regard, analysts do not think so. Michael A, a Gartner analyst, says there is no need to wait for SP1 to have plans to upgrade to the Vista operating system. SP1, he argues, can improve Vista's security and compatibility, but it's not important enough to be integrated, so there's no need to wai

The market sales of NETGEAR wireless routers are very good and already the main force in the routing industry. Here we will introduce you to the new ideas and new design ideas of NETGEAR wireless routers, NETGEAR wireless router is a new wireless router that complies with the 11N standard under the network component. It adopts the brand

can reach each other (direct introduction can be), the cost is 0, that is, the cost of a point connection in an SCC is 0. So first the SCC shrinks a new composition and forms a DAG graph (directed acyclic graph). Note: It is not necessary to connect points within an SCC, but it is a cost to connect two SCC, so we need

on E in which the sum of weight of these edges is minimum).For example, we may get the possible sums: (1) 7 + 10 + 5 = 22(2) 7 + 10 + 2 = 19(There is "Hamiltonian circuit" in this graph!)Inputin The first line there was an integer T, indicates the number of test cases. (T In each case, the first line contains integers n and m, indicates the number of vertices and the number of edges. (1 Then M. Lines, each line contains three integers a,b,c, indicates that there is one edge between A and

this, only need a Zoho account, login browser can enjoy.Zoho belongs to the brand branch of Zohocorporation (Zhuohao), headquartered in California, the Research and Development Center is located in Chennai, India, with subsidiaries and affiliates in the UK, Canada, Australia, China, Japan, Singapore and Brazil. It has manageengine-it management solutions, Zoho-cloud services, WEBNMS-the three major brands of the network development platform.For more blog posts, please visit Http://blog.csdn.net