Advanced SQL

Q1: The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T ;

A Equi-join

B Natural join

C Outer join

D Cartesian join

Q2: Which of the following is a correlated subquery?

A Uses the result of an inner query to determine the processing of an outer query.

B Uses the result of an outer query to determine the processing of an inner query.

C Uses the result of an inner query to determine the processing of an inner query.

D Uses the result of an outer query to determine the processing of an outer query.

Q3: A CASE SQL statement is which of the following?

A A way to establish an IF-THEN-ELSE in SQL.

B A way to establish a loop in SQL.

C A way to establish a data definition in SQL.

D All of the above.

Q4: The following SQL is which type of join: SELECT CUSTOMER_T. CUSTOMER_ID, ORDER_T. CUSTOMER_ID, NAME, ORDER_ID FROM CUSTOMER_T,ORDER_T WHERE CUSTOMER_T. CUSTOMER_ID = ORDER_T. CUSTOMER_ID

A Equi-join

B Natural join

C Outer join

D Cartesian join

Q5: Which of the following statements is true concerning subqueries?

A Involves the use of an inner and outer query.

B Cannot return the same result as a query that is not a subquery.

C Does not start with the word SELECT.

D All of the above.

Q6: What type of join is needed when you wish to include rows that do not have matching values?

A Equi-join

B Natural join

C Outer join

D All of the above.

Q7: Which of the following is one of the basic approaches for joining tables?

A Subqueries

B Union Join

C Natural join

D All of the above

Q8: Which of the following is true concerning a procedure?

A You do not create them with SQL.

B They do not need to have a unique name.

C They include procedural and SQL statements.

D They are the same thing as a function.

Q9: Which of the following is true concerning systems information in an RDBMS?

A RDBMS store database definition information in system-created tables.

B This information can be accessed using SQL.

C This information often cannot be updated by a user.

D All of the above.

Q10: Embedded SQL is which of the following?

A Hard-coded SQL statements in a program language such as Java.

B The process of making an application capable of generating specific SQL code on the fly.

C Hard-coded SQL statements in a procedure.

D Hard-coded SQL statements in a trigger.

Q11: Which of the following is true concerning triggers?

A You do not create them with SQL.

B They execute against only some applications that access a database.

C They have an event, condition, and action.

D They cannot cascade (cause another trigger to fire).

Q12: Which of the following statements is true concerning routines and triggers?

A Both consist of procedural code.

B Both have to be called to operate.

C Both run automatically.

D Both are stored in the database.

Q13: How many tables may be included with a join?

A One

B Two

C Three

D All of the above.

Q14: A UNION query is which of the following?

A Combines the output from no more than two queries and must include the same number of columns.

B Combines the output from no more than two queries and does not include the same number of columns.

C Combines the output from multiple queries and must include the same number of columns.

D Combines the output from multiple queries and does not include the same number of columns.

Q15: What type of join is needed when you wish to return rows that do have matching values?

A Equi-join

B Natural join

C Outer join

D All of the above.


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