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多选题Which four are correct guidelines for naming database tables? （）AMust begin with either a number or a letter.BMust be 1-30 characters long.CShould not be an Oracle Server reserved word.DMust contain only A-Z, a-z, 0-+, _, *, and #.EMust contain only A-

题目
多选题
Which four are correct guidelines for naming database tables? （）
A

Must begin with either a number or a letter.

B

Must be 1-30 characters long.

C

Should not be an Oracle Server reserved word.

D

Must contain only A-Z, a-z, 0-+, _, *, and #.

E

Must contain only A-Z, a-z, 0-9, _, $, and #.

F

Must begin with a letter.

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Which four of these statements are restrictions for Frame Relay PVC bundles with QoS support for IP and MPLS？ （）

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第2题：

Which three statements are true regarding subqueries?（）

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第3题：

Which four are correct guidelines for naming database tables? ()

A. Must begin with either a number or a letter.

B. Must be 1-30 characters long.

C. Should not be an Oracle Server reserved word.

D. Must contain only A-Z, a-z, 0-+, _, *, and #.

E. Must contain only A-Z, a-z, 0-9, _, $, and #.

F. Must begin with a letter.


参考答案：B, C, E, F

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Which four are correct guidelines for naming database tables?（）

  • A、Must begin with either a number or a letter.
  • B、Must be 1-30 characters long.
  • C、Should not be an Oracle Server reserved word.
  • D、Must contain only A-Z, a-z, 0-+, _, *, and #.
  • E、Must contain only A-Z, a-z, 0-9, _, $, and #.
  • F、Must begin with a letter.

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