Which of the following is true concerning systems information in an RDBMS? RDBMS store database definition information in system-created tables. This information often cannot be updated by a user. All of these This information can be accessed using SQL. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statements is true concerning subqueries? Does not start with the word SELECT. Cannot return the same result as a query that is not a subquery. Involves the use of an inner and outer query. All of these TRUE ANSWER : ? YOUR ANSWER : ?
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 Cartesian join Equi-join Outer join Natural join TRUE ANSWER : ? YOUR ANSWER : ?
A transaction is the complete set of closely related update commands that must all be done, or none of them done, for the database to remain valid. True False TRUE ANSWER : ? YOUR ANSWER : ?
What type of join is needed when you wish to include rows that do not have matching values? Equi-join Natural join Outer join All of these TRUE ANSWER : ? YOUR ANSWER : ?
Embedded SQL is which of the following? Hard-coded SQL statements in a program language such as Java. The process of making an application capable of generating specific SQL code on the fly. Hard-coded SQL statements in a procedure. Hard-coded SQL statements in a trigger. TRUE ANSWER : ? YOUR ANSWER : ?
A correlated subquery is where the outer query depends on data from the inner query. False True TRUE ANSWER : ? YOUR ANSWER : ?
How many tables may be included with a join? Three Two One All of these TRUE ANSWER : ? YOUR ANSWER : ?
The UNION clause is used to combine the output from multiple queries together into a single result table. True False TRUE ANSWER : ? YOUR ANSWER : ?