soap - Salesforce.com Id 属性似乎有 15 和 18 个字符的值，有什么区别？

Question

当使用 SOAP API 与 salesforce.com (SFDC) 一起工作时，底层数据库中的主键似乎是 Id。好吧，这个值似乎有两种表示形式，要么是 15 个字符的版本，要么是 18 个字符的版本。

我一直在使用 18，因为它显然更具体，但是最后三位数字中包含什么，它们似乎可以删除？

有谁明白这是怎么回事？

Answer 1

来自 Web Services API Developer's Guide :

ID fields in the Salesforce.com user interface contain 15-character, base-62, case-sensitive strings. Each of the 15 characters can be a numeric digit (0-9), a lowercase letter (a-z), or an uppercase letter (A-Z). Two unique IDs may only be different by a change in case.

Because there are applications like Access which do not recognize that 50130000000014c is a different ID from 50130000000014C, an 18-digit, case-safe version of the ID is returned by all API calls. The 18 character IDs have been formed by adding a suffix to each ID in the Force.com API. 18-character IDs can be safely compared for uniqueness by case-insensitive applications, and can be used in all API calls when creating, editing, or deleting data.

If you need to convert the 18-character ID to a 15-character version, truncate the last three characters. Salesforce.com recommends that you use the 18-character ID.