Sunday 31 October 2010

Sql For Dummies

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Web Demo:
1.You need to load information about new customers from the NEW_CUST table into the tables CUST and CUST_SPECIAL. If a new customer has a credit limit greater than 10,000, then the details have to be inserted into CUST_SPECIAL. All new customer details have to be inserted into the CUST table. Which technique should be used to load the data most efficiently?
A. external table
B. the MERGE command
C. the multitable INSERT command
D. INSERT using WITH CHECK OPTION
Answer: C


2.View the Exhibit and examine the description of the ORDERS table.
Which two WHERE clause conditions demonstrate the correct usage of conversion functions? (Choose two.)
A. WHERE order_date > TO_DATE('JUL 10 2006','MON DD YYYY')
B. WHERE TO_CHAR(order_date,'MON DD YYYY') = 'JAN 20 2003'
C. WHERE order_date > TO_CHAR(ADD_MONTHS(SYSDATE,6),'MON DD YYYY')
D. WHERE order_date IN ( TO_DATE('Oct 21 2003','Mon DD YYYY'), TO_CHAR('NOV 21 2003','Mon DD YYYY') )
Answer: AB


3.View the Exhibit and examine the structure of the EMP table which is not partitioned and not an index-organized table.
Evaluate the following SQL statement:
ALTER TABLE emp
DROP COLUMN first_name;
Which two statements are true regarding the above command? (Choose two.)
A. The FIRST_NAME column would be dropped provided it does not contain any data.
B. The FIRST_NAME column would be dropped provided at least one or more columns remain in the table.
C. The FIRST_NAME column can be rolled back provided the SET UNUSED option is added to the above SQL statement.
D. The FIRST_NAME column can be dropped even if it is part of a composite PRIMARY KEY provided the CASCADE option is used.
Answer: BD


Related Exams:
1z0-272 - Hyperion-Planning-9.3-Administrator-I&II
1z0-020 - oracle8l:new-features-for-administrators
1Z1-403 - Enterprise-Linux-System-Administration
1z0-200 - Oracle-11i-E-Business-Essentials.
1z0-312 - Oracle-Application-Server-10g:-Administrator-II

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