Informatics Practices

Fill in the Blank
The **COUNT(*)** function provides the total number of …………… within a relation (table) in a relational database.
Columns
Unique values
Not-null values
Rows

SQL Joins & Grouping

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Answer

Rows

Reason — The COUNT(*) function provides the total number of rows within a relation (table) in a relational database. It counts all rows, including duplicates and NULL values.

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Informatics Practices

Fill in the Blank
The **COUNT(*)** function provides the total number of …………… within a relation (table) in a relational database.
Columns
Unique values
Not-null values
Rows

SQL Joins & Grouping

Answer

Related Questions

Which of the following Python statements is used to import data from a CSV file into a Pandas DataFrame (Note: pd is an alias for pandas)?
pd.open_csv('filename.csv')
pd.read_csv('filename.csv')
pd.load_csv('filename.csv')
pd.import_csv('filename.csv')

What is plagiarism ?
Using copyrighted material without giving proper acknowledgement to the source
Downloading illegal software.
Spreading misinformation online.
Hacking into computer systems.

In which of the network topologies do all devices connect to a central point, such as a switch or hub?
Star
Bus
Tree
Mesh

In a Pandas DataFrame, if the tail() function is used without specifying the optional argument indicating the number of rows to display, what is the default number of rows displayed, considering the DataFrame has 10 entries ?
0
1
4
5

Informatics Practices

Fill in the BlankThe COUNT(*) function provides the total number of …………… within a relation (table) in a relational database.ColumnsUnique valuesNot-null valuesRows

SQL Joins & Grouping

Answer

Related Questions

Which of the following Python statements is used to import data from a CSV file into a Pandas DataFrame (Note: pd is an alias for pandas)?pd.open_csv('filename.csv')pd.read_csv('filename.csv')pd.load_csv('filename.csv')pd.import_csv('filename.csv')

What is plagiarism ?Using copyrighted material without giving proper acknowledgement to the sourceDownloading illegal software.Spreading misinformation online.Hacking into computer systems.

In which of the network topologies do all devices connect to a central point, such as a switch or hub?StarBusTreeMesh

In a Pandas DataFrame, if the tail() function is used without specifying the optional argument indicating the number of rows to display, what is the default number of rows displayed, considering the DataFrame has 10 entries ?0145

Fill in the Blank
The **COUNT(*)** function provides the total number of …………… within a relation (table) in a relational database.
Columns
Unique values
Not-null values
Rows

Which of the following Python statements is used to import data from a CSV file into a Pandas DataFrame (Note: pd is an alias for pandas)?
pd.open_csv('filename.csv')
pd.read_csv('filename.csv')
pd.load_csv('filename.csv')
pd.import_csv('filename.csv')

What is plagiarism ?
Using copyrighted material without giving proper acknowledgement to the source
Downloading illegal software.
Spreading misinformation online.
Hacking into computer systems.

In which of the network topologies do all devices connect to a central point, such as a switch or hub?
Star
Bus
Tree
Mesh

In a Pandas DataFrame, if the tail() function is used without specifying the optional argument indicating the number of rows to display, what is the default number of rows displayed, considering the DataFrame has 10 entries ?
0
1
4
5