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 in SQL is specifically designed to modify existing records in a database table. This allows the analyst to overwrite specific cells in the identified column, 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 table rather than modifying existing ones. This query would not help the analyst overwrite cells in an already populated column, as its primary function is to introduce new data into the database.

B (UPDATE query) CORRECT

The UPDATE query is the correct choice for this scenario. It allows the analyst to specify which rows to modify and what new values to assign, making it ideal for correcting inconsistencies in specific cells of a column. This query is essential for maintaining the accuracy and integrity of the data in the database.

C (SELECT query) YOUR ANSWER

The SELECT query is utilized for retrieving data from a database but does not alter any existing records. It allows the analyst to view current data but does not provide a mechanism to overwrite or modify values, making it unsuitable for the task at hand.

D (CREATE TABLE query) YOUR ANSWER

The CREATE TABLE query is used to create a new database table. This option is irrelevant for the task of overwriting cells in an existing table, as it focuses on structure creation rather than data modification.

Conclusion

To address inconsistencies during data cleansing, the analyst should use the UPDATE query, which is explicitly designed for modifying existing data entries. The other choices—INSERT INTO, SELECT, and CREATE TABLE—serve different purposes within SQL and do not facilitate the required action of overwriting cells in a table. By using the UPDATE query, the analyst can effectively ensure the accuracy of the data.

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

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