Which of the following would return the number of people whose "Age"is over 18 and whose "Height" is under 72 from data frame df? df.loc[df["Age"] > 18 and df["Height"] < 72, "Name"].value_counts() df.loc[(df["Age"] > 18) & (df["Height"] < 72), "Name"].count() df.loc[(df["Age"] > 18) & (df["Height"] < 72), "Name"].value_counts() df.loc[(df["Age"] > 18) and (df["Height"] < 72), "Name"].count()
SQL
SQL stands for Structured Query Language, is a form of communication that uses queries structured in a specific format to store, manage & retrieve data from a relational database.
Queries
A query is a type of computer programming language that is used to retrieve data from a database. Databases are useful in a variety of ways. They enable the retrieval of records or parts of records, as well as the performance of various calculations prior to displaying the results. A search query is one type of query that many people perform several times per day. A search query is executed every time you use a search engine to find something. When you press the Enter key, the keywords are sent to the search engine, where they are processed by an algorithm that retrieves related results from the search index. Your query's results are displayed on a search engine results page, or SER.
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Which of the following would return the number of people whose "Age"is over 18 and whose "Height" is under 72 from data frame df?
Introduction :
Pandas is a Python library that provides high-performance data structures and data analysis tools for manipulating numerical tables and time series. It allows for data manipulation, cleaning, and analysis in an easy-to-use, intuitive way. It works with data stored in Series, DataFrames, and Panel objects. Pandas also provide tools for working with missing values, grouping, reshaping, merging, joining, and other data manipulation tasks. It is an essential tool for data scientists and analysts.
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