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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Creating Other Schema Objects | 10% | - Create synonyms for database objects - Create, modify, and retrieve data from a view - Create, maintain, and use sequences - Create and maintain indexes |
| Topic 2: Restricting and Sorting Data | 6% | - Sort the rows that are retrieved by a query - Limit the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands - Use ampersand substitution to restrict and sort output at runtime |
| Topic 3: Manipulating Data | 14% | - Control transactions - Update rows in a table - Delete rows from a table - Insert rows into a table - Describe each data manipulation language (DML) statement |
| Topic 4: Using Subqueries to Solve Queries | 15% | - Write single-row and multi-row subqueries - List the types of subqueries - Define subqueries - Describe the types of problems that subqueries can solve |
| Topic 5: Using Single-Row Functions to Customize Output | 10% | - Manipulate dates with the date functions - Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Describe the differences between single-row and multiple-row functions - Perform arithmetic with date data |
| Topic 6: 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 |
| Topic 7: Using Conversion Functions and Conditional Expressions | 10% | - Describe implicit and explicit data type conversion - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions - Use conditional IF THEN ELSE logic in a SELECT statement - Apply the NVL, NULLIF, and COALESCE functions to data |
| Topic 8: Retrieving Data Using the SQL SELECT Statement | 5% | - List the capabilities of SQL SELECT statements - Execute a basic SELECT statement - Differentiate between SQL statements and SQL*Plus commands |
| Topic 9: Working with Oracle Database SQL | 8% | - Create a container database - Explain the installation of Oracle Database software - Describe the Oracle Database architecture - Start up and shut down a database |
| Topic 10: Using DDL Statements to Create and Manage Tables | 14% | - Categorize the main database objects - Drop, rename, and truncate tables - Alter table definitions - Create a simple table - Review the table structure - Describe the data types that are available for columns |
| Topic 11: Displaying Data from Multiple Tables Using Joins | 15% | - Cross join tables - View data that does not meet a join condition by using outer joins - 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 |
| Topic 12: Reporting Aggregated Data Using Group Functions | 15% | - Describe the use of group functions - Identify the available group functions - Include or exclude grouped rows by using the HAVING clause - Group data by using the GROUP BY clause |
| Topic 13: Controlling User Access | 5% | - Grant privileges on tables and on a view - Distinguish between granting privileges and roles - Differentiate system privileges from object privileges |
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NEW QUESTION # 207
Which three statements are true regarding indexes? (Choose three.)
Answer: A,D,E
NEW QUESTION # 208
The STORES table has a column START_ DATE of data type DATE, containing the date the row was inserted.
You only want to display details of rows where START_ DATE is within the last 25 months.
Which WHERE clause can be used?
Answer: A
Explanation:
When you need to compare dates and calculate the difference in months between two dates, you use the MONTHS_BETWEEN function in Oracle SQL.
A . This statement is incorrect because MONTHS_BETWEEN takes the later date first, then the earlier date.
B . This statement is correct. The MONTHS_BETWEEN function returns the number of months between two dates. It takes the later date (in this case, SYSDATE) first and the earlier date (start_date) second. If the start_date is within the last 25 months, the result will be less than or equal to 25.
C . This statement is incorrect. The expression TO_NUMBER(start_date - SYSDATE) would not give the correct number of months between the dates.
D . This statement is incorrect. The ADD_MONTHS(start_date, 25) function adds 25 months to start_date, and comparing it to SYSDATE would show dates that are at least 25 months in the future.
Reference:
Oracle Documentation on Date Functions: https://docs.oracle.com/database/121/SQLRF/functions089.htm#SQLRF00651
NEW QUESTION # 209
Which two statements are true about single row functions?
Answer: B,D
NEW QUESTION # 210
Table EMPLOYEES contains columns including EMPLOYEE_ID, JOB_ID and SALARY.
Only the EMPLOYEES_ID column is indexed.
Rows exist for employees 100 and 200.
Examine this statement:
UPDATE employees
SET (job_id, salary) =
(SELECT job_id, salary
FROM employees
WHERE employee_id = 200)
WHERE employee id=100;
Which two statements are true?
Answer: D,E
NEW QUESTION # 211
Which two statements are true about a self join?
Answer: B,E
NEW QUESTION # 212
......
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