"Variables 是和characteristic绑定的，可用于任何含有该characteristic的query中。
Offset的应用：设置偏移量
SAP BI Content内置了很多标准变量。当其无法满足需求时，有时仅仅需要设置下偏移量就可以满足需求了。
例如系统已经有了当前月份的变量，通过偏移就可以获得..."
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