Another query against the summary table returns no data as well.
再次查询总结表，仍然没有返回任何数据。
Not unexpectedly, a query against the summary table at this point returns no data.
不出所料，此时对总结表的查询没有返回任何数据。
Another query against the summary table returns no data, but after the REFRESH table statement executes this time, the query runs successfully.
再次查询总结表，又是没有返回数据，但是当执行了REFRESHtable语句之后，查询得以成功运行。
Most of the time, polling returns no data, or worse, data we've already seen and have to process again or identify as having already been processed.
在大多数时候，轮询不返回数据，更糟的是，会返回我们已经见过的数据，但又必须再次处理或标识为已经处理过。
The first hypothetical request returns information about the book (author, title, descriptions, and so on); it contains no user-specific data.
第一个假定的请求会返回有关书籍的信息(作者、标题、简介等)；其中并没有包含特定于用户的数据。
In some cases, there is no data in the database corresponding to the requested bean; the container returns a null, as there is no bean matching the client's request.
有些情况下，数据库中并没有与请求的bean对应的数据；则容器返回空，因为没有bean与客户机的请求匹配。
If there is no data to read, a read call returns immediately.
如果没有数据可读，read调用立即返回。
Note that feof also returns False if you're reading a URL and the socket has timed out because you no longer have data to read.
如果读取的是URL并且套接字由于不再有任何数据可以读取而超时，则feof也将返回False。
Since pretty much every RDBMS returns integer data the same way there is no need to convert integer data.
因为相当多的RDBMS以相同的方法返回整数数据，没有必要转换整数数据。
Since pretty much every RDBMS returns integer data the same way there is no need to convert integer data.
因为相当多的RDBMS以一样的方法返回整数数据，没有必要转变整数数据。
Since pretty much every RDBMS returns integer data the same way there is no need to convert integer data.
因为相当多的RDBMS以一样的方法返回整数数据，没有必要转变整数数据。
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