The UNION clause is used to combine the output from multiple queries together into a single result table. False True TRUE ANSWER : ? YOUR ANSWER : ?
Embedded SQL is which of the following? Hard-coded SQL statements in a trigger. The process of making an application capable of generating specific SQL code on the fly. Hard-coded SQL statements in a program language such as Java. Hard-coded SQL statements in a procedure. TRUE ANSWER : ? YOUR ANSWER : ?
Triggers are stored blocks of code that have to be called in order to operate. True False TRUE ANSWER : ? YOUR ANSWER : ?
When AUTOCOMMIT is set on, changes will be made automatically at the end of each SQL statement. True False TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following statements is true concerning subqueries? Involves the use of an inner and outer query. All of these Cannot return the same result as a query that is not a subquery. Does not start with the word SELECT. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is true concerning systems information in an RDBMS? All of these RDBMS store database definition information in system-created tables. This information can be accessed using SQL. This information often cannot be updated by a user. TRUE ANSWER : ? YOUR ANSWER : ?
Which of the following is true concerning triggers? You do not create them with SQL. They have an event, condition, and action. They cannot cascade (cause another trigger to fire). They execute against only some applications that access a database. TRUE ANSWER : ? YOUR ANSWER : ?
The most frequently used relational operation, which brings together data from two or more related tables into one resultant table, is called an equi-join. False True TRUE ANSWER : ? YOUR ANSWER : ?
How many tables may be included with a join? One Two Three All of these TRUE ANSWER : ? YOUR ANSWER : ?
With the UNION clause, each query involved must output the same number of columns, and they must be UNION compatible. False True TRUE ANSWER : ? YOUR ANSWER : ?