To answer this question, let's go through each option to understand why it is correct or incorrect:

Option A) We can use Application Trigger to fire when a DELETE statement occurs - This option is incorrect. Application triggers are specific to certain applications and are not directly related to database operations such as DELETE statements.

Option B) We can use database Trigger to fire when an INSERT statement occurs - This option is correct. Database triggers can be defined to fire before or after various database operations, including INSERT statements.

Option C) We can use System event Trigger to fire when a DELETE statement occurs - This option is incorrect. System event triggers are used to respond to system-level events, such as system startup or shutdown, rather than specific database operations like DELETE statements.

Option D) We can use INSTEAD OF trigger to fire when an INSERT statement occurs - This option is incorrect. INSTEAD OF triggers are typically used with views and allow the trigger to take the place of the actual DML operation (e.g., INSERT, UPDATE, DELETE). However, they are not specific to INSERT statements only.

The correct answer is option B. We can use a database trigger to fire when an INSERT statement occurs. Database triggers are commonly used to define actions that are automatically executed in response to specific database events.

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To answer this question, you need to understand triggers and their capabilities.

Triggers are database objects that are automatically executed in response to specific events, such as changes to data in a table. They can be used to enforce business rules, perform auditing, or automatically update related data.

When a trigger is fired, it can execute SQL statements or call other database objects. In this case, the CALL statement is used to call a stored procedure. Therefore, the correct answer is C) Stored procedure.

Let's go through each option to understand why it is correct or incorrect:

Option A) Package - A CALL statement inside a trigger body cannot directly call a package. However, a stored procedure or function within the package can be called using the CALL statement.

Option B) Stored function - A CALL statement inside a trigger body can call a stored function. This is a valid option, but it is not the correct answer given in the question.

Option C) Stored procedure - A CALL statement inside a trigger body can call a stored procedure. This is the correct answer, as stated in the question.

Option D) Another DB trigger - A CALL statement inside a trigger body can call another trigger. However, it is generally not recommended to have triggers calling other triggers directly, as it can lead to complex and difficult-to-maintain code.

Therefore, the correct answer is C) Stored procedure. This option is correct because a CALL statement inside a trigger body enables the calling of a stored procedure.

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To answer this question, we need to understand the concept of concatenation in SQL and the number of aliases used in the query.

The given query is:

SELECT address1||','||address2||','||address2 "Address" FROM employee;

In this query, we are concatenating three columns: address1, ',', and address2. We are using the pipe symbol (||) to concatenate these values.

We are also giving an alias "Address" to the concatenated result.

Now let's go through each option to determine the correct answer:

Option A) 1 - This option is incorrect because we are concatenating three columns, so there should be three columns in the result.

Option B) 2 - This option is incorrect because we are concatenating three columns, so there should be three columns in the result.

Option C) 3 - This option is correct because we are concatenating three columns, so there should be three columns in the result.

Option D) 4 - This option is incorrect because we are concatenating three columns, so there should be three columns in the result.

Therefore, the correct answer is C) 3. This option is correct because the query concatenates three columns, resulting in three columns in the output.

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To answer this question, you need to understand the SQL*Plus tool used for executing SQL commands in Oracle.

In SQL*Plus, the character used to continue a statement onto the next line is the hyphen (-).

The correct answer is B) - (hyphen). This option is correct because the hyphen character is used in SQL*Plus to continue a statement onto the next line.

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To answer this question, we need to understand the different editions of DB2 and their capabilities.

Option A) DB2 Personal Edition - This option is correct because DB2 Personal Edition is designed for individual users and allows them to access other DB2 servers. However, it cannot accept requests from other remote clients.

Option B) DB2 Workgroup Server Edition - This option is incorrect because DB2 Workgroup Server Edition allows multiple users to access the database and can accept requests from remote clients.

Option C) DB2 Enterprise Server Edition - This option is incorrect because DB2 Enterprise Server Edition is the most comprehensive edition and supports multiple users and remote clients.

Option D) DB2 Data Warehouse Edition - This option is incorrect because DB2 Data Warehouse Edition is specifically designed for data warehousing purposes and supports multiple users and remote clients.

The correct answer is A) DB2 Personal Edition. This edition allows users to access other DB2 servers but cannot accept requests from other remote clients.

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