1z1-071 Exam Details | Practice 1z1-071 Mock

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Oracle 1z0-071 exam is an intermediate-level certification exam that covers a broad range of SQL topics. 1z1-071 exam requires candidates to have a deep understanding of SQL concepts and experience with the Oracle SQL database management system. 1z1-071 Exam is 90 minutes long, and candidates need to answer 73 questions correctly to pass the exam.

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Oracle Database SQL Sample Questions (Q230-Q235):

NEW QUESTION # 230
You are designing the structure of a table in which two columns have the specifications:
COMPONENT_ID- must be able to contain a maximum of 12 alphanumeric characters and uniquely identify the row EXECUTION_DATETIME- contains Century, Year, Month, Day, Hour, Minute, Second to the maximum precision and is used for calculations and comparisons between components.
Which two options define the data types that satisfy these requirements most efficiently?

A. The EXECUTION_DATETIME must be of TIMESTAMP data type.
B. The EXECUTION_DATETIME must be of DATE data type.
C. The COMPONENT_IDmust be of ROWID data type.
D. The COMPONENT_IDcolumn must be of CHAR data type.
E. The EXECUTION_DATETIME must be of INTERVAL DAY TO SECOND data type.
F. The COMPONENT_IDmust be of VARCHAR2 data type.

Answer: B,D

NEW QUESTION # 231
View the exhibit and examine the description of the PRODUCT_INFORMATION table.

Which SQL statement would retrieve from the table the number of products having LIST_PRICE as NULL?

A. SELECT COUNT (NVL(list_price, 0))FROM product_informationWHERE list_price is NULL
B. SELECT COUNT (list_price)FROM product_informationWHERE list_price is NULL
C. SELECT COUNT (list_price)FROM product_informationWHERE list_price i= NULL
D. SELECT COUNT (DISTINCT list_price)FROM product_informationWHERE list_price is NULL

Answer: A

NEW QUESTION # 232
Which two statements are true about the rules of precedence for operators?

A. The + binary operator has the highest precedence in an expression in a SQL statements.
B. Multiple parentheses can be used to override the default precedence of operators in an expression.
C. Arithmetic operators with equal precedence are evaluated from left to right within an expression.
D. The concatenation operator || is always evaluated before addition and subtraction in an expression.
E. NULLS influence the precedence of operators in an expression.

Answer: B,C

Explanation:
A . True, arithmetic operators of equal precedence are evaluated from left to right within an expression, according to the standard SQL operator precedence. B. True, multiple parentheses can be used in an expression to change the order of operations and override the default precedence of operators.
C, D, and E are not correct because: C. The + binary operator does not have the highest precedence; multiplication and division have higher precedence in SQL. D. NULLS do not influence the precedence of operators in an expression; they may affect the result of an operation but not the order in which operators are evaluated. E. The concatenation operator (||) has lower precedence than arithmetic operators in SQL expressions.
Reference:
Oracle documentation on operator precedence: Oracle Database SQL Language Reference

NEW QUESTION # 233
Which three statements are true regarding subqueries?

A. Main query and subquery can get data from different tables.
B. Multiple columns or expressions can be compared between the main query and subquery.
C. Subqueries can contain GROUP BY and ORDER BY clauses.
D. Main query and subquery must get data from the same tables.
E. Subqueries can contain ORDER BY but not the GROUP BY clause.
F. Only one column or expression can be compared between the main query and subquery.

Answer: A,B,C

Explanation:
Explanation
References:
http://docs.oracle.com/javadb/10.6.2.1/ref/rrefsqlj13658.html

NEW QUESTION # 234
See the Exhibit and examine the structure of the PROMOTIONS table:

Using the PROMOTIONS table,
you need to find out the average cost for all promos in the range $0-2000 and $2000-5000 in category A.
You issue the following SQL statements:

What would be the outcome?

A. It generates an error because multiple conditions cannot be specified for the WHEN clause.
B. It generates an error because NULL cannot be specified as a return value.
C. It executes successfully and gives the required result.
D. It generates an error because CASE cannot be used with group functions.

Answer: C

Explanation:
Explanation
CASE Expression
Facilitates conditional inquiries by doing the work of an IF-THEN-ELSE statement:
CASE expr WHEN comparison_expr1 THEN return_expr1
[WHEN comparison_expr2 THEN return_expr2
WHEN comparison_exprn THEN return_exprn
ELSE else_expr]
END

NEW QUESTION # 235
......

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1z1-071 Exam Details | Practice 1z1-071 Mock

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Oracle Database SQL Sample Questions (Q230-Q235):

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