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Question 10/68
You run the following Transact-SQL following statement:
Customer records may be inserted individually or in bulk from an application.
You observe that the application attempts to insert duplicate records.
You must ensure that duplicate records are not inserted and bulk insert operations continue without notifications.
Which Transact-SQL statement should you run?
CREATE UNIQUE NONCLUSTERED INDEX IX_Customer_Code ON Customer (Code) WITH
Customer records may be inserted individually or in bulk from an application.
You observe that the application attempts to insert duplicate records.
You must ensure that duplicate records are not inserted and bulk insert operations continue without notifications.
Which Transact-SQL statement should you run?
CREATE UNIQUE NONCLUSTERED INDEX IX_Customer_Code ON Customer (Code) WITH
Correct Answer: B
Explanation/Reference:
Explanation:
IGNORE_DUP_KEY = { ON | OFF } specifies the error response when an insert operation attempts to insert duplicate key values into a unique index. The IGNORE_DUP_KEY option applies only to insert operations after the index is created or rebuilt. The option has no effect when executing CREATE INDEX, ALTER INDEX, or UPDATE. The default is OFF.
Incorrect Answers:
ONLINE = { ON | OFF } specifies whether underlying tables and associated indexes are available for queries and data modification during the index operation. The default is OFF.
References: https://docs.microsoft.com/en-us/sql/t-sql/statements/create-index-transact-sql?view=sql- server-2017
Explanation:
IGNORE_DUP_KEY = { ON | OFF } specifies the error response when an insert operation attempts to insert duplicate key values into a unique index. The IGNORE_DUP_KEY option applies only to insert operations after the index is created or rebuilt. The option has no effect when executing CREATE INDEX, ALTER INDEX, or UPDATE. The default is OFF.
Incorrect Answers:
ONLINE = { ON | OFF } specifies whether underlying tables and associated indexes are available for queries and data modification during the index operation. The default is OFF.
References: https://docs.microsoft.com/en-us/sql/t-sql/statements/create-index-transact-sql?view=sql- server-2017
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