我們用SAPGUI登錄某個系統時，除了用戶名和密碼外，還要指定一個必填字段client：

這個client是什麽東東？

看文檔:

SAP Client is the highest hierarchical organizational unit within an SAP system that contains master records and tables. The transactions processed at SAP client level is valid and applicable for all company code data and enterprise structures.Client is a three digits numerical key and from a business point of view, client represents as a corporate group. User is required to enter client key while logging on to the SAP system.

SAP client是SAP系統裏包含了主數據和業務數據的層級結構最高的組織單元標識符，業務上來說代表一個企業，技術類型是一個三位的正整數。

Important Client Characteristics

• Every SAP user’s access and authorizations must assigned to the SAP client on which client users are working.
• It is used to differentiate between development, quality and product system within the same or different server
• The data entered at client level is valid for all organizational units.
• Each client can have one or more company codes, plants and locations but there will be not have connection between clients.

事務碼SCC4查看Netweaver系統上所有已創建的client列表：

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什麽是SAP GUI的client