[单选]
Given that tables T1 and T2 contain the following rows: Table T1:
C1 C2
5 4 5 2 5 5
Table T2: C1 C2 5 1 5 2 5 3
Which of the following queries will return only those rows that exist in T1 and not in T2?（）

A . SELECT * FROM T1 MINUS SELECT * FROM T2
B . SELECT * FROM T1 EXCEPT SELECT * FROM T2
C . SELECT * FROM T2 UNION EXCEPT SELECT * FROM T1
D . SELECT * FROM T1 NOT EXISTS SELECT * FROM T2

A customer wants to purchase an IBM System Storage DS8700 to support a high-performance database environment. Which technical solution gives the customer the best relationship between I/O performance at the machine’s backend vs. capacity installed in the machine（） additional installation of the first and second expansion frame will increase the backend performance capability。 the usage of 300 GB/15k FC disks will give the server a high-performance backend capability。 performance Accelerator restricts the number of disks connected to one device adapter pair to 32 disks。 the second RIO-G loop between the base frame and the first expansion increases the backend performance。 YSP4.7型钢瓶，允许最大充装重量为（）㎏。 4.7；。 1.9；。 2.0；。 2.5。我国家庭农业生产规模很小，全国平均每户承包土地（）亩左右。某用户希望增加一个备份存储池在现有的DS5000存储系统上，那种磁盘提供了最好的选择：（） SATA。 SAS。 Fibre Channel。 SCSI。在小学课堂教学中，教师对于表现优秀的小组给予小花红奖励。这种教学效应最适合的心理学解释理论（）强化说。认知失调论。从众说。观察学习理论。

Given that tables T1 and T2 contain the following rows: Table T1:
C1 C2
5 4 5 2 5 5
Table T2: C1 C2 5 1 5 2 5 3
Which of the following queries will return only those rows that exist in T1 and not in T2?（）

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[单选] Given that tables T1 and T2 contain the following rows: Table T1: C1 C2 5 4 5 2 5 5 Table T2: C1 C2 5 1 5 2 5 3 Which of the following queries will return only those rows that exist in T1 and not in T2?（）

相关题目:

[单选]
Given that tables T1 and T2 contain the following rows: Table T1:
C1 C2
5 4 5 2 5 5
Table T2: C1 C2 5 1 5 2 5 3
Which of the following queries will return only those rows that exist in T1 and not in T2?（）