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| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Using Data Dictionary Views | - Retrieve metadata and object information | |
| Topic 2: Controlling User Access | - Roles, granting and revoking privileges - System and object privileges | |
| Topic 3: Managing Tables and Constraints | - Constraints: primary key, foreign key, unique, check, not null - Temporary and external tables - Data types, creating/altering/dropping tables | |
| Topic 4: Using Single-Row Functions to Customize Output | 20% | - Character, number, and date functions - Nested functions usage |
| Topic 5: Using Subqueries to Solve Queries | - Single-row and multi-row subqueries - Correlated subqueries for update/delete | |
| Topic 6: Displaying Data from Multiple Tables | 15% | - Self-joins and outer joins - Equijoins and non-equijoins - Cartesian products |
| Topic 7: Using SET Operators | - UNION, UNION ALL, INTERSECT, MINUS operators - Ordering results with set operations | |
| Topic 8: Aggregating Data Using Group Functions | 10% | - SUM, AVG, COUNT, MAX, MIN functions - GROUP BY and HAVING clauses - Handling NULLs in group functions |
| Topic 9: Relational Database Concepts | 10% | - Relationship between database and SQL - ERD and SQL statement mapping - Theoretical and physical aspects of relational databases |
| Topic 10: Managing Indexes, Synonyms and Sequences | - Create and maintain indexes - Create and use sequences - Create and use synonyms | |
| Topic 11: Managing Views | - Updatable and read-only views - Create, modify and drop views | |
| Topic 12: Conversion Functions and Conditional Expressions | 10% | - Implicit and explicit data type conversion - NVL, NULLIF, COALESCE and CASE expressions - TO_CHAR, TO_NUMBER, TO_DATE functions |
| Topic 13: Working with Time Zones and Date/Time Data | - TIMESTAMP, INTERVAL data types - Time zone conversion functions | |
| Topic 14: Manipulating Data and Managing Transactions | - INSERT, UPDATE, DELETE, MERGE statements - Multi-table inserts - Transaction control: COMMIT, ROLLBACK, SAVEPOINT | |
| Topic 15: Retrieving Data Using SQL SELECT Statement | 20% | - Arithmetic operations and NULL handling - SELECT statement syntax and usage - Column aliases, concatenation, literals and DISTINCT |
| Topic 16: Restricting and Sorting Data | 15% | - WHERE clause and filtering conditions - Operator precedence - Substitution variables, DEFINE and VERIFY commands - ORDER BY clause and sorting rules |
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NEW QUESTION # 404
In your session, the NLS._DAE_FORMAT is DD- MM- YYYY.There are 86400 seconds in a day.Examine this result:
DATE
02-JAN-2020
Which statement returns this?
Answer: D
NEW QUESTION # 405
Which two statements cause changes to the data dictionary?
Answer: A,B
NEW QUESTION # 406
Which two statements are true regarding roles? (Choose two.)
Answer: A,D
Explanation:
References:
http://docs.oracle.com/cd/E25054_01/network.1111/e16543/authorization.htm#autoId28
NEW QUESTION # 407
Evaluate these commands which execute successfully CREATE SEQUENCE ord_seq
INCREMENT BY 1
START WITH 1
MAXVALUE 100000
CYCLE
CACHE 5000;
Create table ord_items(
ord_no number(4) default ord_seq.nextval not null,
Item_no number(3),
Qty number(3),
Expiry_date date,
Constraint it_pk primary key(ord_no,item_no),
Constraint ord_fk foreign key (ord_no) references orders(ord_no));
Which two statements are true about the ORD_ITEMS table and the ORD_SEQ sequence?
Answer: C,D
NEW QUESTION # 408
View the exhibit and examine the structure and data in the INVOICE table.
Which two SQL statements would execute successfully? (Choose two.)
Answer: B,C
NEW QUESTION # 409
......
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