Rows can be selected by using Boolean selection. When applied to a data frame, a Boolean selection can utilize data from multiple columns. Consider the following query, which identifies all stocks with a price less than 100:
This result can then be applied to the DataFrame using the  operator to return only the rows where the result was True:
Multiple conditions can be put together using parentheses. The following retrieves the symbols and price for all stocks with a price between 6 and 10:
It is common ...