求解730里面一道关于sequence的题目
Q: 14 A sequence was created with the DDL statement shown below:
CREATE SEQUENCE my_seq START WITH 5 INCREMENT BY 5 CACHE 5
User1 successfully executes the following statements in Connection1:
VALUES NEXT VALUE FOR my_seq INTO :con1hvar
VALUES NEXT VALUE FOR my_seq INTO :con1hvar
User2 successfully executes the following statement in Connection2:
VALUES NEXT VALUE FOR my_seq INTO :con2hvar
After User1 & User2 are finished, User3 executes the following statement in Connection3:
SELECT NEXT VALUE FOR my_seq FROM sysibm.sysdummy1
Which value will be returned by the query?
A. 20
B. 25
C. 50
D. 55
这道题的答案给出是D，应该如何解释。我在自己的环境上模拟的3用户3次connection得出的结果是A啊，答案是错误的么
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[解决办法]
就是做完一个断开一个的连接
到连接3的时候就是55
