Most of the tables in the work items snapshot include the WI_COUNT column, which shows the sum of the work items that have matching characteristics.
工作项快照的大多数表格都包含有wi_count列，它显示了匹配特征的一些工作项。
2
The nullability characteristics of each column must be the same.
每列的为空性（nullability）特征必须相同。
3
In our previous column, we discussed software security analysis at a high level, introduced a methodology for assessing software security, and explained the key characteristics of a risk analysis.