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| Section | Weight | Objectives |
|---|---|---|
| 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 |
| Retrieving Data Using the SQL SELECT Statement | 5% | - Differentiate between SQL statements and SQL*Plus commands - List the capabilities of SQL SELECT statements - Execute a basic SELECT statement |
| Using Subqueries to Solve Queries | 15% | - List the types of subqueries - Describe the types of problems that subqueries can solve - Define subqueries - Write single-row and multi-row subqueries |
| Using Set Operators | 5% | - Describe the order of precedence when the set operators are used - Use a set operator to combine multiple queries into a single query - Describe set operators |
| Displaying Data from Multiple Tables Using Joins | 15% | - 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 - Cross join tables - Join a table to itself by using a self-join |
| Using Single-Row Functions to Customize Output | 10% | - Manipulate numbers with the ROUND, TRUNC, and MOD functions - Describe the differences between single-row and multiple-row functions - Perform arithmetic with date data - Manipulate dates with the date functions - Manipulate strings with character function in the SELECT and WHERE clauses |
| Controlling User Access | 5% | - Differentiate system privileges from object privileges - Grant privileges on tables and on a view - Distinguish between granting privileges and roles |
| Working with Oracle Database SQL | 8% | - Start up and shut down a database - Create a container database - Explain the installation of Oracle Database software - Describe the Oracle Database architecture |
| Using Conversion Functions and Conditional Expressions | 10% | - Apply the NVL, NULLIF, and COALESCE functions to data - Use conditional IF THEN ELSE logic in a SELECT statement - Describe implicit and explicit data type conversion - Use the TO_CHAR, TO_NUMBER, and TO_DATE conversion functions |
| Manipulating Data | 14% | - Update rows in a table - Insert rows into a table - Describe each data manipulation language (DML) statement - Control transactions - Delete rows from a table |
| Creating Other Schema Objects | 10% | - Create, modify, and retrieve data from a view - Create synonyms for database objects - Create, maintain, and use sequences - Create and maintain indexes |
| Using DDL Statements to Create and Manage Tables | 14% | - Create a simple table - Categorize the main database objects - Review the table structure - Drop, rename, and truncate tables - Describe the data types that are available for columns - Alter table definitions |
| Restricting and Sorting Data | 6% | - Use ampersand substitution to restrict and sort output at runtime - Use DEFINE and UNDEFINE commands - Sort the rows that are retrieved by a query - Limit the rows that are retrieved by a query |
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NEW QUESTION # 178
View the Exhibit and examine the details of the ORDER_ITEMS table.
Evaluate the following SQL statements:
Statement 1:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items;
Statement 2:
SELECT MAX(unit_price*quantity) "Maximum Order"
FROM order_items
GROUP BY order_id;
Which statements are true regarding the output of these SQL statements? (Choose all that apply.)
Answer: B,C,E
NEW QUESTION # 179
The CUSTOMERStable has a CUST_CREDIT_LIMITcolumn of data type NUMBER.
Which two queries execute successfully?
Answer: A,B
NEW QUESTION # 180
Examine the description of the EMPLOYEEStable:
Which query is valid?
Answer: B
NEW QUESTION # 181
See the Exhibit and Examine the structure of the CUSTOMERS table:
Using the CUSTOMERS table, you need to generate a report that shows an increase in the credit limit by 15% for all customers. Customers whose credit limit has not been entered should have the message "Not Available" displayed.
Which SQL statement would produce the required result?
Answer: B
Explanation:
NVL Function
Converts a null value to an actual value:
Data types that can be used are date, character, and number.
Data types must match:
NVL(commission_pct,0)
NVL(hire_date,'01-JAN-97')
NVL(job_id,'No Job Yet')
NEW QUESTION # 182
Which two statements are true about the SET VERIFY ON command?
Answer: A,D
Explanation:
The SET VERIFY ON command is related to how SQL*Plus and SQL Developer display information about substitution variables:
A . It displays values for variables created by the DEFINE command: When VERIFY is set to ON, SQL*Plus and SQL Developer will display the old and new values of a substitution variable when it is redefined using the DEFINE command or when a new value is provided for it during the session.
B . It can be used in SQL Developer and SQL*Plus: While traditionally associated with SQL*Plus, the SET VERIFY command is also supported in SQL Developer, allowing you to control the display of substitution variable values in both environments.
Reference:
Oracle SQL*Plus User's Guide and Reference, especially the section on the SET command and substitution variables.
NEW QUESTION # 183
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