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Q21. The city table has the following structure:
Consider the statement with an incorrect field name:
PREPARE countryBYID FROM ‘SELECT country FROM city WHERE ID=?,
What happens if a prepared statement named countryByID already exists when the above statement is executed?
A. A duplicate name error will result because a prepared statement with the same name already exists.
B. An unknown column error will result and the old prepared statement definition will remain in effect.
C. An unknown column error will result and no prepared statement named countryByID will exist.
D. A warning will result and the old prepared statement definition will remain in effect.
Answer: C
Q22. Which two Functions can be used in a C program to retrieve information about warning?
A. mysql_info
B. mysql_error
C. mysql_warning_count
D. mysql_errno
Answer: A,C
Explanation: http://dev.mysql.com/doc/refman/5.6/en/c-api-function-overview.html
Q23. Consider the stored procedure CREATE PROCEDURE param_test ( IN P_in INT,
OUT P_out INT, INPUT P_inout INT) BEGIN
SELECT P_in, P_out, P_ inout; SET P_in, P_inout
END
You execute a series of commands:
What is the output of the CALL and SELECT?
A. (0,0,0) and (0,0,0)
B. (0,0,0,) and (0,200,300)
C. (0,NULL,0) and(0,200,300)
D. (0,NULL,0) and (100,200,300)
Answer: C
Q24. Which three are valid identifiers for the user table in the mysq1 database?
A. myssq1. user
B. ‘mysq1. user’
C. ‘mysq1’. ‘user’
D. Mysq1. ‘user’
E. ‘’mysq1. User’’
Answer: A,C,D
Q25. Examine the structure and content of the MemberLocation table:
You want to have the field location returned in all letters (example: BERLIN). Which query would you use?
A. SELECT UPPER (Location) as location FROM MemberLocation
B. SELECT UPPER (BINARY location) as location FROM MemberLocation
C. SELECT UPPER (location AS UPPER ) as location FROM Memberlocation
D. SELECT CONVERT (Location AS UPPER ) as location FROM memberlocation
Answer: A
Explanation:
https://dev.mysql.com/doc/refman/5.0/en/string-functions.html#function_upper
Q26. Which statement is true about the difference between HASH and BTREE INDEXES?
A. HASH indexes support rightmost prefixing of keys, which makes them faster than BTREE indexes in many causes.
B. HASH indexes can be used by the optimizer to speed up ORDER BY operations and not BTREE indexes.
C. HASH indexes are used only for equality comparisons (= or<=>),whereas BTREE indexes can also be used for range searches (>or<).
D. HASH indexes are much faster than BTREE indexes but can only be used for a single column.
Answer: C
Explanation: Reference:https://devcenter.heroku.com/articles/postgresql-indexes
Q27. Consider the CREATE FUNCTION statement:
CREATE FUNCTION countrycount () BEGIN
DECLARE count INT;
SELECT COUNT (*) INTO count FROM country; RETURN count ;
END
What is the outcome when you try to create the function?
A. An error results as the SELECT must assign the return values to a user variable.
B. An error results as the count variable is not initialized with a value.
C. An error result as the function must be defined with the CONTAINS SQL clause.
D. An error result as the variable type returned by the function must be defined with a RETURNS clause.
Answer: D
Explanation:
Routine Functions must provide a RETURNS clause noting data-type just after func_name and parameters, before characteristics.
Q28. You want to compare all columns of table A to columns with matching names in table B. You want to select the rows where those have the same values on both tables.
Which query accomplishes this?
A. SELECT * FROM tableA. tableB
B. SELECT * FROM tableA JOIN tableB
C. SELECT * FROM table A INNER JOIN tableB
D. SELECT * FROM tableA NATURAL JOIN tableB
E. SELECT & FROM tableA STRAIGHT JOIN tableB
Answer: D
