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You should use the following SQL statement: SELECT CD_TITLE AS COMPACT_DISC FROM INVENTORY; 5. Which clauses in a SELECT statement are required A. SELECT B. FROM C. WHERE D. GROUP BY A and B are the correct answers. 6. Which keyword should you add to the SELECT clause to ensure that each row of the query result is unique A. ALL B. ROLLUP C. DISTINCT D. CUBE C is the correct answer. 7. You re creating a SELECT statement for the INVENTORY table and you want to ensure that only rows with a RETAIL_PRICE value of less than $16.00 are included in the query results. What WHERE clause should you use You should use the following WHERE clause: WHERE RETAIL_PRICE < 16.00 8. You re creating a SELECT statement that includes a WHERE clause. The WHERE

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clause contains two predicates. You want the condition of either one of the predicates to be met, but it s not necessary for both conditions to be met. What keyword should you use to connect the two predicates

SELECT rtrim(substr(LPAD(' ',2*(LEVEL-1))||operation,1,30))||' ' ||rtrim(options)||' '||rtrim(object_name)|| ' ' ||'(cost= '||cost||', cardinality='||cardinality||')' "Query Plan" FROM plan_table START WITH id = 0 AND upper(statement_id) = upper('STMT_1') CONNECT BY PRIOR id = parent_id AND upper(statement_id) = upper('STMT_1'); Query Plan ----------------------------------------------SELECT STATEMENT (cost= 10, cardinality=5) SORT ORDER BY (cost= 10, cardinality=5) HASH JOIN (cost= 9, cardinality=5) MERGE JOIN (cost= 5, cardinality=5) TABLE ACCESS BY INDEX ROWID MPAA_RATING (cost= 2, cardinality=6) INDEX FULL SCAN SYS_C005440 (cost= 1, cardinality=6) SORT JOIN (cost= 3, cardinality=5) TABLE ACCESS BY INDEX ROWID MOVIE (cost= 2, cardinality=5) INDEX RANGE SCAN SYS_C005449 (cost= 1, cardinality=5) TABLE ACCESS FULL MOVIE_GENRE (cost= 3, cardinality=16) 10 rows selected.

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OR 9. Each predicate in a WHERE clause is evaluated to which of the following A. True B. Not C. False D. Unknown A, C, and D are the correct answers.

We just can t control some things, no matter how hard we try. One of those is the occurrence of a natural disaster. Of course, certain areas of the world are at more risk than others, but you don t have to read many newspapers to realize that natural disasters are a real risk everywhere. In many ways, we always protect against natural disasters. For example, buildings are designed to resist fire and, in some cases, earthquakes and tornadoes. When we need help, we usually call an emergency line that is staffed by waiting people whose sole purpose is to help us. Although we can t prevent natural disasters from happening, there are ways to protect against the effects of a natural disaster. When it comes to information systems, well-planned networks provide for a secondary site that can be used to host critical servers, if necessary. Although this can be quite costly, many organizations have found that the costs are justified when compared to the possibility of unplanned downtime.

10. Which clause allows you to group together values in a specified column A. ROLLUP B. HAVING C. ORDER BY D. GROUP BY D is the correct answer. 11. Which two operators can you use in a GROUP BY clause to return additional summary data in a query result A. ROLLUP B. HAVING C. CUBE D. DISTINCT A and C are the correct answers. 12. You re writing a SELECT statement that retrieves the CATEGORY and PRICE columns from the COMPACT_DISC_STOCK table. You want to group data together first by the CATEGORY column and then by the PRICE column. Which SELECT statement should you use You should use the following SQL statement: SELECT CATEGORY, PRICE FROM COMPACT_DISC_STOCK GROUP BY CATEGORY, PRICE; 13. You re writing a SELECT statement that retrieves the CATEGORY and PRICE

Here are some key points regarding the query plan that appears in the result set: The indentation shows the order of execution, with the innermost steps being performed rst. The cost values show a relative cost. The numbers have no meaning beyond their relative differences. For example, a cost of 10 represents a step that uses twice the resources of a step that has a cost of 5. The cardinality values show the estimated number of rows that are processed by the step. TABLE ACCESS FULL indicates a full table scan where all rows in the table are read sequentially. INDEX RANGE SCAN indicates the scan of a portion of the rows in an index. TABLE ACCESS BY INDEX indicates access to a table using the index shown. The sorts and joins should be self evident by the step names.

columns from the COMPACT_DISC_STOCK table. You want to group together data first by the CATEGORY column and then by the PRICE column. You then want to filter out any groups that have a PRICE value over 15.99. Which SELECT statement should you use

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