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| Section | Weight | Objectives |
|---|---|---|
| Manipulating Data | 14% | - Insert rows into a table - Describe each data manipulation language (DML) statement - Delete rows from a table - Control transactions - Update rows in a table |
| Using Set Operators | 5% | - Describe set operators - Describe the order of precedence when the set operators are used - Use a set operator to combine multiple queries into a single query |
| Using Subqueries to Solve Queries | 15% | - Define subqueries - Describe the types of problems that subqueries can solve - List the types of subqueries - Write single-row and multi-row subqueries |
| Reporting Aggregated Data Using Group Functions | 15% | - Group data by using the GROUP BY clause - Describe the use of group functions - Include or exclude grouped rows by using the HAVING clause - Identify the available group functions |
| Restricting and Sorting Data | 6% | - Use DEFINE and UNDEFINE commands - Sort the rows that are retrieved by a query - Limit the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime |
| Controlling User Access | 5% | - Differentiate system privileges from object privileges - Distinguish between granting privileges and roles - Grant privileges on tables and on a view |
| Retrieving Data Using the SQL SELECT Statement | 5% | - Execute a basic SELECT statement - List the capabilities of SQL SELECT statements - Differentiate between SQL statements and SQL*Plus commands |
| Creating Other Schema Objects | 10% | - Create, modify, and retrieve data from a view - Create, maintain, and use sequences - Create and maintain indexes - Create synonyms for database objects |
| Using DDL Statements to Create and Manage Tables | 14% | - Review the table structure - Describe the data types that are available for columns - Drop, rename, and truncate tables - Alter table definitions - Categorize the main database objects - Create a simple table |
| Using Single-Row Functions to Customize Output | 10% | - Perform arithmetic with date data - Manipulate strings with character function in the SELECT and WHERE clauses - Describe the differences between single-row and multiple-row functions - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Manipulate dates with the date functions |
| Using Conversion Functions and Conditional Expressions | 10% | - Apply the NVL, NULLIF, and COALESCE functions to data - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Use conditional IF THEN ELSE logic in a SELECT statement - Describe implicit and explicit data type conversion |
| Displaying Data from Multiple Tables Using Joins | 15% | - View data that does not meet a join condition by using outer joins - Cross join tables - Write SELECT statements to access data from more than one table using equijoins and non-equijoins - Join a table to itself by using a self-join |
| Working with Oracle Database SQL | 8% | - Start up and shut down a database - Create a container database - Describe the Oracle Database architecture - Explain the installation of Oracle Database software |
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NEW QUESTION # 91
Examine the structure of the PROMOTIONS table:
Management requires a report of unique promotion costs in each promotion category.
Which query would satisfy this requirement?
Answer: A
NEW QUESTION # 92
See the Exhibit and examine the structure of the PROMOTIONS table: Exhibit:
Using the PROMOTIONS table, you need to find out the average cost for all promos in the
range $0-2000 and $2000-5000 in category A.
You issue the following SQL statements:
Exhibit:
What would be the outcome?
Answer: A
Explanation:
CASE Expression Facilitates conditional inquiries by doing the work of an IF-THEN-ELSE statement: CASE expr WHEN comparison_expr1 THEN return_expr1 [WHEN comparison_expr2 THEN return_expr2 WHEN comparison_exprn THEN return_exprn ELSE else_expr] END
NEW QUESTION # 93
You need to list the employees in DEPARTMENT_ID 20 days in a single row, ordered by HIRE_DATE.
Examine the sample output:
Which query will provide the required output?
Answer: D
NEW QUESTION # 94
Which two statements are true about sequences created in a single instance database? (Choose two.)
Answer: A,C
Explanation:
Gaps in the Sequence
Although sequence generators issue sequential numbers without gaps, this action occurs
independent of a commit or rollback. Therefore, if you roll back a statement containing a
sequence, the number is lost.
Another event that can cause gaps in the sequence is a system crash. If the sequence
caches values in memory, those values are lost if the system crashes.
Because sequences are not tied directly to tables, the same sequence can be used for
multiple tables.
However, if you do so, each table can contain gaps in the sequential numbers.
Modifying a Sequence
If you reach the MAXVALUE limit for your sequence, no additional values from the sequence are allocated and you will receive an error indicating that the sequence exceeds the MAXVALUE. To continue to use the sequence, you can modify it by using the ALTER SEQUENCE statement To remove a sequence, use the DROP statement:
DROP SEQUENCE dept_deptid_seq;
NEW QUESTION # 95
Examine the business rule:
Each student can work on multiple projects and each project can have multiple students.
You need to design an Entity Relationship Model (ERD) for optimal data storage and allow for generating reports in this format:
STUDENT_ID FIRST_NAME LAST_NAME PROJECT_ID PROJECT_NAME PROJECT_TASK
Which two statements are true in this scenario? (Choose two.)
Answer: A,E
Explanation:
References:
http://www.oracle.com/technetwork/issue-archive/2011/11-nov/o61sql-512018.html
NEW QUESTION # 96
......
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