MongoDB支持各种条件运算符，包括。
MongoDB supports a variety of conditional operators, including.
避免使用3元条件运算符。
条件运算符的优先级比按位运算符的优先级低。
The conditional operator has lower precedence than bitwise operators.
下表汇总了为标准SQL定义的搜索条件运算符。
The following table summarizes search condition operators that are defined for standard SQL.
过滤条件可以指定为列名，其后跟等式、不等式或布尔运算符，然后是过滤值。
Filter criteria are specified as the column name, followed by an equality, inequality, or Boolean operator, followed by the filter value.
您可以使用AND和OR运算符添加附加筛选条件。
You can add additional filter criteria with and and or operators.
接下来选择运算符”isgreaterthan“，最后类型”Number“值为 0.0的被选择为最后一个条件。
Then the operator "is greater than" is selected and finally the type "Number" with value 0.0 is selected for the last term.
提供指向常规参考主题（讲述查询、运算符和搜索条件）、用户界面参考主题和错误信息主题的链接。
Provides links to general reference topics covering queries, operators, search conditions, user interface reference topics, and error message topics.
请注意，可使用布尔运算符组合多个条件。
Note that multiple conditions are combined by using Boolean operators.
它使你的条件表达式变得更加可读，避免了布尔运算符的使用。
It makes your conditional expressions more readable; avoiding the use of Boolean operators.
本章早些时候接触到的所有关系运算符都可拿来构造一个条件语句。
Any of the relational operators you've seen earlier in this chapter can be used to produce a conditional statement.
如果被测试表达式中应当包含按位或运算符，则应当在条件表达式的两侧加上括号。
If the tested expression should contain the bitwise-or operator, then parentheses should be added around the conditional-expression.
如果被测试表达式中应当包含按位或运算符，则应当在条件表达式的两侧加上括号。
If the tested expression should contain the bitwise-or operator, then parentheses should be added around the conditional-expression.
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