Refer to the Supplier table. Which statement correctly changes Adan Stevens to Maria Stevens?

Question

BlackTom AI · Accepted Answer

The question asks which statement correctly changes Adan Stevens to Maria Stevens in the Supplier table.

First, note that the provided data includes an answer block containing a single SQL statement:
UPDATE Supplier
SET ContactName = 'Maria Stevens'
WHERE SupplierID = 5;
This is a straightforward UPDATE command that targets the Supplier table, assigns a new value to the ContactName column, and restricts the change to rows where SupplierID equals 5.

Now, since there are no alternative answer options listed, we can only evaluate the given statement in isolation.

Evaluation of the statement:
- The syntax is valid SQL: UPDATE followed by the table name, SET to assign the new value, and a WHERE clause to specify which row to update. 
- The value 'Maria Stevens' is correctly quoted as a string literal for the ContactName column.
- The WHERE clause uses SupplierID = 5 to identify the specific supplier. If Adan Stevens is indeed the supplier with SupplierID = 5, this will change his contact name to Maria Stevens. 
- Potential caveats: ensure that SupplierID = 5 actually corresponds to Adan Stevens in the current database state; if the ID is different, the update will modify the wrong supplier or no row at all. Also, if there are multiple rows with the same SupplierID (which would be unusual if SupplierID is a primary key), this could update multiple rows, though typically SupplierID is a unique identifier. 
- Consider verifying with a preliminary SELECT to confirm which row has SupplierID = 5 and what ContactName currently is, for example: SELECT SupplierID, ContactName FROM Supplier WHERE SupplierID = 5;

If there were other plausible statements to consider, we would compare their correctness similarly: check syntax, ensure the correct table and column names, verify the WHERE condition selects exactly the intended row, and confirm that the updated value reflects the intended new name. The given statement, assuming the mapping of Adan Stevens to SupplierID 5 is correct, is the appropriate form to perform the update.

Refer to the Supplier table. Which statement correctly changes Adan Stevens to Maria Stevens?Single choice

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