Which two are true about aggregate functions?（）A、You can use aggregate functions in any clause of a SELECT statement.B、You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.C、You can mix

题目

Which two are true about aggregate functions?（）

  • A、You can use aggregate functions in any clause of a SELECT statement.
  • B、You can use aggregate functions only in the column list of the select clause and in the WHERE clause of a SELECT statement.
  • C、You can mix single row columns with aggregate functions in the column list of a SELECT statement by grouping on the single row columns.
  • D、You can pass column names, expressions, constants, or functions as parameter to an aggregate function.
  • E、You can use aggregate functions on a table, only by grouping the whole table as one single group.
  • F、You cannot group the rows of a table by more than one column while using aggregate functions.
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更多“Which two are true about aggrega”相关问题

  • 第1题：

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    B. A lower number is preferred.

    C. A higher number is preferred.

    D. 100 is the default precedence.


    参考答案：B, D

  • 第2题：

    Which statement about Belgium is NOT true?

    A.it is twice as big as Beijing.
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    D.it has no government.

    答案：D
    解析：

  • 第3题：

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    • A、Traffic is clear text
    • B、Traffic is encrypted 
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    • D、They are initiated by the LAC

    正确答案:A,D

  • 第4题：

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  • 第5题：

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    • C、 WSA supports NTLM but not LDAP
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  • 第8题：

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    正确答案:B,D

  • 第9题：

    多选题
    Which two statements are true about L2TP tunnels?（） (Choose two.)
    A

    Traffic is clear text

    B

    Traffic is encrypted 

    C

    They are initiated by the LNS

    D

    They are initiated by the LAC


    正确答案： B,D
    解析： 暂无解析

  • 第10题：

    多选题
    Which two statements are true about AH?（） (Choose two.)
    A

    AH provides data integrity.

    B

    AH is identified by IP protocol 50.

    C

    AH is identified by IP protocol 51.

    D

    AH cannot work in conjunction with ESP


    正确答案： D,C
    解析： 暂无解析

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    B

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    C

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    D

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  • 第16题：

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  • 第18题：

    Which two statements are true about pool-based source NAT? （）(Choose two.)

    • A、PAT is not supported.
    • B、PAT is enabled by default.
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    正确答案:B,C

  • 第19题：

    Which two statements about creating constraints are true?（）

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    • C、Constraints can be created after the table is created
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  • 第20题：

    单选题
    Which statement is true about the digital to analog conversion process？（）
    A

    the two steps of digital to analog conversion are decompression and reconstruction of the analog signal

    B

    the two steps of digital to analog conversion are decoding and filtering

    C

    the two steps of digital to analog conversion are decompression and filtering of the analog signal

    D

    the two steps of digital to analog conversion are quantization and decoding


    正确答案： C
    解析： 暂无解析

  • 第21题：

    多选题
    Which two statements about creating constraints are true?（）
    A

    Constraint names must start with SYS_C

    B

    All constraints must be defines at the column level

    C

    Constraints can be created after the table is created

    D

    Constraints can be created at the same time the table is created

    E

    Information about constraints is found in the VIEW_CONSTRAINTS dictionary view


    正确答案： E,D
    解析： 暂无解析

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