Examine these statements which execute successfully: ALTER SESSION SET NLS_DATE_FORMAT = ‘DD-MON-YYYY HH24 MI: SS’ ALTER SESSION SET TIME_ ZONE = ‘-5:00’; SELECT DBTIMEZONE, SYSDATE FROM DUAL Exam ...

Examine the description of the EMPLOYEES table: Name Null? Type ------- ------------- ------------- EMPLOYEE_ NAME NOT NULL VARCHAR ...

.Examine the data in the INVOICES table: INVOICE_ID CURRENCY_CODE RAISED_DATE ---------- --------------- -------------- 1 EUR ...

Which two are true about unused columns? A) The DESCRIBE command displays unused columns B) A primary key column cannot be set to unused. C) A query can return data from unused columns, but no DML is ...

Which two are true about queries using set operators such as UNION? A) An expression in the first SELECT list must have a column alias for the expression B) CHAR columns of different lengths used with ...

.You execute these commands: CREATE TABLE customers (customer id INTEGER, customer name VARCHAR2 (20)); INSERT INTO customers VALUES (1，Custmoer1 ‘); SAVEPOINT post insert; INSERT INTO customers VAL ...

Which two are true about the precedence of opertors and condtions A) + (addition) has a higher order of precedence than * (mliplpition) B) NOT has a higher order of precedence than AND and OR in a con ...

Which three are true aboutprivileges and roles? A) System prilgese always set prilge for an entire database. B) PUBLIC acts as a default role granted to every user in a database. c) A user has all obj ...