可以让选择排列生效，影响关系运算符eq、le等。
You can put available collations in effect to impact relational operators eq, le, and so forth.
它可以包括多个使用Python中支持的不同关系运算符的子表达式。
It can be composed of multiple subexpressions that use the different relational operators supported in Python.
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.
操作可以是一个关系运算符，或者系统或用户定义的函数，也可以是一个sql操作符，例如GROUPBY、ORDER BY等。
An operation can be a relational operator, a system - or user-defined function, or an SQL operator, such as GROUP BY, ORDER BY, and so on.
对于Web应用程序，数据源通常是一个关系数据库，其中内置了一些搜索功能(Equality是一个简单的搜索运算符，与SQL运算符like一样)。
For a Web application, the data source is commonly a relational database, which has some forms of search built in. (Equality is a simple search operator, as is the SQL operator LIKE.)
而关系数据库标准查询语言SQL没有除法运算符，不能直接作除法。
However, there are no division symbol in SQL, so the division can not be operated directly.
而关系数据库标准查询语言SQL没有除法运算符，不能直接作除法。
However, there are no division symbol in SQL, so the division can not be operated directly.
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