During data cleansing, an analyst found certain inconsistencies in a column and wants to overwrite a few cells of the table. Which Structured Query Language (SQL) query should the analyst use?

Rationale

UPDATE query

The UPDATE query is specifically designed to modify existing records in a database table. It allows the analyst to overwrite specific cells or fields in the table, addressing any inconsistencies found during data cleansing.

A (INSERT INTO query) YOUR ANSWER

The INSERT INTO query is used to add new rows to a database table. It does not modify existing records but rather introduces new data entirely. Therefore, it is not suitable for overwriting cells in a column where inconsistencies have been identified.

B (UPDATE query) CORRECT

This option is the correct choice because the UPDATE query enables the analyst to change the values of existing records in the database. By specifying the target column and conditions, the analyst can effectively overwrite the necessary cells to correct any inconsistencies discovered during data cleansing.

C (SELECT query) YOUR ANSWER

The SELECT query is utilized for retrieving data from one or more tables and does not alter the data in any way. It is fundamentally aimed at displaying information rather than modifying it, making it an inappropriate choice for the task of overwriting cells.

D (CREATE TABLE query) YOUR ANSWER

The CREATE TABLE query is used to create a new table within the database. It does not interact with existing data and, therefore, cannot be employed to overwrite or modify any cells in an already established table, making it irrelevant for this situation.

Conclusion

To address inconsistencies in a database column, the analyst should employ the UPDATE query, which is specifically designed to change existing data. The other options—INSERT INTO, SELECT, and CREATE TABLE—serve different functions that do not apply to the task of overwriting cells. Understanding the distinct purposes of these SQL queries is crucial for effective data management and cleansing.

During data cleansing, an analyst found certain inconsistencies in a column and wants to overwrite a few cells of the table. Which Structured Query Language (SQL) query should the analyst use?

UPDATE query

Related Questions

Related Quizzes

How familiar were you with this question?

Report an Issue

Rate this Practice Test