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Which method of cursor class is used to get the number of rows affected after any of the insert/ update/delete database operation executed from Python?
- a)cursor.rowcount
- b)cursor.getaffectedcount
- c)cursor.rowscount
- d)cursor.rcount
Correct answer is option 'A'. Can you explain this answer?
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Which method of cursor class is used to get the number of rows affecte...
Explanation:
The correct method of the cursor class used to get the number of rows affected after any insert/update/delete database operation executed from Python is cursor.rowcount.
cursor.rowcount is a read-only attribute that returns the number of rows affected by the last executed SQL statement. It can be used to determine the success of the operation and to get the count of affected rows.
Details:
When a database operation like insert, update, or delete is executed using a cursor object in Python, the database server returns the number of rows affected by that operation.
The cursor.rowcount attribute is then used to access the number of rows affected. This attribute provides the count of affected rows as an integer value.
Here are a few important points regarding the cursor.rowcount attribute:
1. The value of cursor.rowcount is -1 if the number of affected rows is not known or cannot be determined.
2. The value of cursor.rowcount is 0 if the last executed SQL statement did not affect any rows.
3. The value of cursor.rowcount is positive if the last executed SQL statement affected one or more rows. The actual value indicates the number of affected rows.
4. cursor.rowcount returns the number of rows affected by the last executed SQL statement only. It does not provide the count of rows affected by any previous statement.
5. The cursor.rowcount attribute can be used after any insert/update/delete operation to check the success of the operation and to perform further actions based on the count of affected rows.
6. It is important to note that cursor.rowcount is not available for select statements as it only provides the count of affected rows for non-select statements.
In conclusion, cursor.rowcount is the correct method of the cursor class used to get the number of rows affected after any insert/update/delete database operation executed from Python.
The correct method of the cursor class used to get the number of rows affected after any insert/update/delete database operation executed from Python is cursor.rowcount.
cursor.rowcount is a read-only attribute that returns the number of rows affected by the last executed SQL statement. It can be used to determine the success of the operation and to get the count of affected rows.
Details:
When a database operation like insert, update, or delete is executed using a cursor object in Python, the database server returns the number of rows affected by that operation.
The cursor.rowcount attribute is then used to access the number of rows affected. This attribute provides the count of affected rows as an integer value.
Here are a few important points regarding the cursor.rowcount attribute:
1. The value of cursor.rowcount is -1 if the number of affected rows is not known or cannot be determined.
2. The value of cursor.rowcount is 0 if the last executed SQL statement did not affect any rows.
3. The value of cursor.rowcount is positive if the last executed SQL statement affected one or more rows. The actual value indicates the number of affected rows.
4. cursor.rowcount returns the number of rows affected by the last executed SQL statement only. It does not provide the count of rows affected by any previous statement.
5. The cursor.rowcount attribute can be used after any insert/update/delete operation to check the success of the operation and to perform further actions based on the count of affected rows.
6. It is important to note that cursor.rowcount is not available for select statements as it only provides the count of affected rows for non-select statements.
In conclusion, cursor.rowcount is the correct method of the cursor class used to get the number of rows affected after any insert/update/delete database operation executed from Python.
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Community Answer
Which method of cursor class is used to get the number of rows affecte...
Checking the options
(A) cursor.rowcount - It returns the number of rows affected by DML statements.
(B) cursor.getaffectedcount - It is not a method of cursor class.
(C) cursor.rowscount - It is not a method of cursor class.
(D) cursor.rcount - It is not a method of cursor class.
From the options given above, the function cursor.rowcount is used to get the number of rows affected after any of the insert/update/delete database operations executed from Python.
So, the correct answer is (A)
(A) cursor.rowcount - It returns the number of rows affected by DML statements.
(B) cursor.getaffectedcount - It is not a method of cursor class.
(C) cursor.rowscount - It is not a method of cursor class.
(D) cursor.rcount - It is not a method of cursor class.
From the options given above, the function cursor.rowcount is used to get the number of rows affected after any of the insert/update/delete database operations executed from Python.
So, the correct answer is (A)
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Which method of cursor class is used to get the number of rows affected after any of the insert/ update/delete database operation executed from Python?a)cursor.rowcountb)cursor.getaffectedcountc)cursor.rowscountd)cursor.rcountCorrect answer is option 'A'. Can you explain this answer?
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