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| Section | Weight | Objectives |
|---|---|---|
| Restricting and Sorting Data | 6% | - Sort the rows that are retrieved by a query - Use DEFINE and UNDEFINE commands - Limit the rows that are retrieved by a query - Use ampersand substitution to restrict and sort output at runtime |
| Using DDL Statements to Create and Manage Tables | 14% | - Describe the data types that are available for columns - Categorize the main database objects - Alter table definitions - Drop, rename, and truncate tables - Review the table structure - Create a simple table |
| Working with Oracle Database SQL | 8% | - Describe the Oracle Database architecture - Explain the installation of Oracle Database software - Start up and shut down a database - Create a container database |
| Manipulating Data | 14% | - Control transactions - Delete rows from a table - Update rows in a table - Insert rows into a table - Describe each data manipulation language (DML) statement |
| Using Set Operators | 5% | - Describe the order of precedence when the set operators are used - Describe set operators - Use a set operator to combine multiple queries into a single query |
| Reporting Aggregated Data Using Group Functions | 15% | - Group data by using the GROUP BY clause - Include or exclude grouped rows by using the HAVING clause - Describe the use of group functions - Identify the available group functions |
| Controlling User Access | 5% | - Differentiate system privileges from object privileges - Distinguish between granting privileges and roles - Grant privileges on tables and on a view |
| Creating Other Schema Objects | 10% | - Create, maintain, and use sequences - Create, modify, and retrieve data from a view - Create and maintain indexes - Create synonyms for database objects |
| Using Subqueries to Solve Queries | 15% | - Write single-row and multi-row subqueries - Describe the types of problems that subqueries can solve - Define subqueries - List the types of subqueries |
| Using Conversion Functions and Conditional Expressions | 10% | - 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 - Apply the NVL, NULLIF, and COALESCE functions to data |
| Displaying Data from Multiple Tables Using Joins | 15% | - Write SELECT statements to access data from more than one table using equijoins and non-equijoins - View data that does not meet a join condition by using outer joins - Cross join tables - Join a table to itself by using a self-join |
| Using Single-Row Functions to Customize Output | 10% | - Manipulate dates with the date functions - Describe the differences between single-row and multiple-row functions - Perform arithmetic with date data - Manipulate strings with character function in the SELECT and WHERE clauses - Manipulate numbers with the ROUND, TRUNC, and MOD functions |
| Retrieving Data Using the SQL SELECT Statement | 5% | - List the capabilities of SQL SELECT statements - Differentiate between SQL statements and SQL*Plus commands - Execute a basic SELECT statement |
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NEW QUESTION # 347
Which three statements are true about Structured Query Language (SQL)?
Answer: B,C
Explanation:
For question 134, the correct options are B and F based on the capabilities and design of SQL:
* B. It best supports relational databases: SQL is fundamentally designed to manage and query data in relational databases. It is the standard language used for managing relational database management systems (RDBMS) and for performing all types of data operations within them.
* F. It provides independence for logical data structures being manipulated from the underlying
* physical data storage: SQL allows users to interact with the data at a logical level without needing to know how the data is physically stored. This is known as logical data independence, which is a key feature of SQL in managing databases.
Other options are incorrect because:
* A: SQL itself doesn't guarantee ACID properties; these are provided by the database management system's transaction control mechanisms.
* C, D, E: These statements are incorrect as SQL does not inherently support object-oriented concepts like encapsulation and polymorphism, is not limited to hierarchical data storage, and is not the only language used for both relational and object-oriented databases.
NEW QUESTION # 348
Which statement is true about aggregate functions?
Answer: D
Explanation:
https://docs.oracle.com/database/121/SQLRF/functions003.htm
NEW QUESTION # 349
Which three statements are true regarding single-row functions? (Choose three.)
Answer: A,B,E
NEW QUESTION # 350
You execute this command:
TRUNCATE TABLE dept;
Which two are true?
Answer: C,E
NEW QUESTION # 351
Examine this SQL statement:
SELECT cust_id, cust_last_name "Last Name
FROM customers
WHERE countryid=10
UNION
SELECT custid CUSTNO, cust_last_name
FROM customers
WHERE countryid=30
Identify three ORDER BY clauses, any one of which can complete the query successfully.
Answer: B,D,E
Explanation:
NEW QUESTION # 352
......
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