第二题 生日蜡烛(结果填空) 某君从某年开始每年都举办一次生日party,并且每次都要吹熄与年龄相同根数的蜡烛. 现在算起来,他一共吹熄了236根蜡烛. 请问,他从多少岁开始过生日party的? 请填写他开始过生日party的年龄数. 注意:提交的应该是一个整数,不要填写任何多余的内容或说明性文字. 分析: 设过生日的岁数是[start, end],则end>start(end==start时,为236,不可能,排除) package bb; public class 生日蜡烛 { privat…

choose one In your Oracle 12c database, you plan to execute the command: SQL> CREATE TABLESPACE tbsl DATAFILE '/u02/oracle/data/tbs0l.dbf' SIZE 50M; The u02 file system has 1 GB of free space available. What is the outcome? A) It raises an error beca…

3.A database is open read write and the instance has multiple sessions some of which have active transactions. You execute this command: SQL> ALTER SYSTEM ENABLE RESTRICTED SESSION; Which three are true about the active transactions? A) They may cont…

80.View the exhibit and examine the structure in ORDERS and ORDER_ITEMS tables. You need to create a view that displays the ORDER_ID, ORDER_DATE, and the total number of items in each order. Which CREATE VIEW statement would create the views successf…

79.Which statement is true about transactions? A. A set of Data Manipulation Language (DML) statements executed in a sequence ending with a SAVEPOINT forms a single transaction. B. Each Data Definition Language(DDL) statement executed forms a single…

78.View the exhibit and examine the structure of the CUSTOMERStable. Which two tasks would require subqueries or joins to be executed in a single statement? A. finding the number of customers, in each city, whose credit limit is more than the average…

77.Which two statements are true about sequences created in a single instance database? (Choose two.) A. When the MAXVALUElimit for the sequence is reached, you can increase the MAXVALUElimit by using the ALTER SEQUENCEstatement. B. DELETE < sequence…

76.View the exhibit and examine the description of the DEPARTMENTSand EMPLOYEEStables. The retrieve data for all the employees for their EMPLOYEE_ID, FIRST_NAME, and DEPARTMENT NAME, the following SQL statement was written: SELECT employee_id, first_…

75.Which statements are correct regarding indexes? (Choose all that apply.) A. A non-deferrable PRIMARY KEYor UNIQUE KEYconstraint in a table automatically attempts to creates a unique index. B. Indexes should be created on columns that are frequentl…

74.View the exhibit and examine the structure of ORDERS and CUSTOMERS tables. ORDERS Name     Null?       Type ORDER_ID  NOT NULL  NUMBER(4) ORDER_DATE  NOT NULL   DATE ORDER_MODE   VARCHAR2(8) CUSTOMER_ID NOT NULL  NUMBER(6) ORDER_TOTAL   NUMBER(8,…