Evaluation Query Operators评估查询运算符
Evaluation operators return data based on evaluations of either individual fields or the entire collection's documents.评估运算符基于对单个字段或整个集合文档的评估返回数据。
Note
For details on a specific operator, including syntax and examples, click on the link to the operator's reference page.有关特定运算符的详细信息,包括语法和示例,请单击该运算符参考页的链接。
$expr | |
$jsonSchema | |
$mod | |
$regex | |
$text | |
$where |