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View the Exhibit and examine the structure of the EMPLOYEES and JOB_HISTORY tables. (Choose all that apply.)
Examine this query which must select the employee IDs of all the employees who have held the job SA_MAN at any time during their employment.
WHERE JOB_ID = \’SA_MAN\’
WHERE JOB_ID = \’SA_MAN\’;
Choose two correct SET operators which would cause the query to return the desired result.
D. UNION ALL
Correct Answer: AD
Which two partitioned table maintenance operations support asynchronous Global Index Maintenance in Oracle database 12c?
A. ALTER TABLE SPLIT PARTITION
B. ALTER TABLE MERGE PARTITION
C. ALTER TABLE TRUNCATE PARTITION
D. ALTER TABLE ADD PARTITION
E. ALTER TABLE DROP PARTITION
F. ALTER TABLE MOVE PARTITION
Correct Answer: CE
Which two statements are true regarding the COUNT function?
A. A SELECT statement using the COUNT function with a DISTINCT keyword cannot have a WHERE clause.
B. COUNT (DISTINCT inv_amt) returns the number of rows excluding rows containing duplicates and NULL values in the INV_AMT column.
C. COUNT (cust_id) returns the number of rows including rows with duplicate customer IDs and NULL value in the CUST_ID column.
D. COUNT (*) returns the number of rows including duplicate rows and rows containing NULL value in any of the columns.
E. The COUNT function can be used only for CHAR, VARCHAR2, and NUMBER data types.
Correct Answer: BD
Examine the structure of the PROGRAMS table:
Which two SQL statements would execute successfully?
A. SELECT NVL (ADD_MONTHS (END_DATE,1) SYSDATE) FROM programs;
B. SELECT TO_DATE (NVL (SYSDATE-END_DATE, SYSDATE)) FROM programs;
C. SELECT NVL (MONTHS_BETWEEN (start_date, end_date), `Ongoing\’) FROM programs;
D. SELECT NVL (TO_CHAR (MONTHS_BETWEEN (start-date, end_date)), `Ongoing\’) FROM programs
Correct Answer: AD
Examine the structure of the MEMBERS table: NameNull-Type
MEMBER_IDNOT NULLVARCHAR2 (6)
LAST_NAMENOT NULLVARCHAR2 (50)
You want to display details of all members who reside in states starting with the letter A followed by exactly one character.
Which SQL statement must you execute?
A. SELECT * FROM MEMBERS WHERE state LIKE \’%A_*;
B. SELECT * FROM MEMBERS WHERE state LIKE \’A_*;
C. SELECT * FROM MEMBERS WHERE state LIKE \’A_%\’;
D. SELECT * FROM MEMBERS WHERE state LIKE \’A%\’;
Correct Answer: B
Which three statements are true regarding the WHERE and HAVING clauses in a SQL statement? (Choose three.)
A. WHERE and HAVING clauses cannot be used together in a SQL statement.
B. The HAVING clause conditions can have aggregate functions.
C. The HAVING clause conditions can use aliases for the columns.
D. The WHERE clause is used to exclude rows before the grouping of data.
E. The HAVING clause is used to exclude one or more aggregated results after grouping data.
Correct Answer: ABD
Which statement is true regarding the UNION operator?
A. By default, the output is not sorted.
B. Null values are not ignored during duplicate checking.
C. Names of all columns must be identical across all select statements.
D. The number of columns selected in all select statements need not be the same.
Correct Answer: B
Which two statements are true about Data Manipulation Language (DML) statements?
A. An INSERT INTO…VALUES.. statement can add multiple rows per execution to a table.
B. An UPDATE… SET… statement can modify multiple rows based on multiple conditions on a table.
C. A DELETE FROM….. statement can remove rows based on only a single condition on a table.
D. An INSERT INTO… VALUES….. statement can add a single row based on multiple conditions on a table.
E. A DELETE FROM….. statement can remove multiple rows based on multiple conditions on a table.
F. An UPDATE….SET…. statement can modify multiple rows based on only a single condition on a table.
Correct Answer: BE
You need to display the date 11-oct-2007 in words as `Eleventh of October, Two Thousand Seven\’. Which SQL statement would give the required result?
A. SELECT TO_CHAR (TO_DATE (\’11-oct-2007\’), `fmDdthsp “of” Month, Year\’)FROM DUAL
B. SELECT TO_CHAR (`11-oct-2007\’, `fmDdspth “of” Month, Year\’)FROM DUAL
C. SELECT TO_CHAR (TO_DATE (`11-oct-2007\’), `fmDdspth of month, year\’)FROM DUAL
D. SELECT TO_DATE (TO_CHAR (\’11-oct-2007\’), `fmDdspth “of” Month, Year\’))FROM DUAL
Correct Answer: C
Evaluate the following two queries: SQL> SELECT cust_last_name, cust_city FROM customers WHERE cust_credit_limit IN (1000, 2000, 3000); SQL> SELECT cust_last_name, cust_city FROM customers WHERE cust_credit_limit = 1000 or cust_credit_limit = 2000 or cust_credit_limit = 3000 Which statement is true regarding the above two queries?
A. Performance would improve in query 2 only if there are null values in the CUST_CREDIT_LIMIT column.
B. There would be no change in performance.
C. Performance would degrade in query 2.
D. Performance would improve in query 2.
Correct Answer: B
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