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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Displaying Data from Multiple Tables Using Joins | 15% | - Cross join tables - Join a table to itself by using a self-join - 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 |
| Topic 2: 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 |
| Topic 3: Controlling User Access | 5% | - Distinguish between granting privileges and roles - Differentiate system privileges from object privileges - Grant privileges on tables and on a view |
| Topic 4: 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 |
| Topic 5: 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 |
| Topic 6: 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 |
| Topic 7: Using Subqueries to Solve Queries | 15% | - Write single-row and multi-row subqueries - Define subqueries - Describe the types of problems that subqueries can solve - List the types of subqueries |
| Topic 8: Manipulating Data | 14% | - Delete rows from a table - Update rows in a table - Insert rows into a table - Control transactions - Describe each data manipulation language (DML) statement |
| Topic 9: Using DDL Statements to Create and Manage Tables | 14% | - Review the table structure - Create a simple table - Drop, rename, and truncate tables - Categorize the main database objects - Describe the data types that are available for columns - Alter table definitions |
| Topic 10: Working with Oracle Database SQL | 8% | - Create a container database - Describe the Oracle Database architecture - Start up and shut down a database - Explain the installation of Oracle Database software |
| Topic 11: Creating Other Schema Objects | 10% | - Create, modify, and retrieve data from a view - Create and maintain indexes - Create synonyms for database objects - Create, maintain, and use sequences |
| Topic 12: Reporting Aggregated Data Using Group Functions | 15% | - Include or exclude grouped rows by using the HAVING clause - Identify the available group functions - Group data by using the GROUP BY clause - Describe the use of group functions |
| Topic 13: 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 - Describe implicit and explicit data type conversion - Use conditional IF THEN ELSE logic in a SELECT statement |
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NEW QUESTION # 157
Examine the BRICKS table:
You write this query:
SELECT
FROM bricks b1 CROSS JOIN bricks b2
WHERE b1. Weight < b2. Weight:
How many rows will the query return?
Answer: D
Explanation:
A: Incorrect because the CROSS JOIN of the BRICKS table with itself will produce more than one row.
B: Incorrect because CROSS JOINing a table with four rows with itself produces 16 rows, but the WHERE condition filters these down.
C: Incorrect because while a CROSS JOIN of a table with four rows with itself produces 16 rows, this answer does not take into account the WHERE condition.
D: Correct. The CROSS JOIN will result in 16 combinations (4x4), but the WHERE condition b1.weight < b2.weight will only be true for combinations where the second weight is greater than the first. Since there are 4 distinct weights, there are (42)=6(24)=6 combinations where one weight is less than the other.
E: Incorrect because this does not account for the conditions specified in the WHERE clause.
F: Incorrect because the query will return some rows due to the condition specified.
NEW QUESTION # 158
Which two statements are true about INTERVAL data types? (Choose two.)
Answer: A,D
Explanation:
https://www.oracletutorial.com/oracle-basics/oracle-interval/
NEW QUESTION # 159
Examine the command:
What does ON DELETE CASCADE imply?
Answer: D
Explanation:
Explanation
NEW QUESTION # 160
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 # 161
Examine this statement:
What is returned upon execution?
Answer: D
NEW QUESTION # 162
......
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