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[单选] In which of the following situations should correlation names be used?()

A . A table referenced in the FROM clause has no indexed column.
B . The table referenced in the FROM clause has more than 200 columns.
C . Two or more tables in the FROM clause have identical column names.
D . The FROM clause contains two or more tables in the SELECT statement.

化学毒物产生毒性的可能途径有哪些? Your database interface is running. A user SCOTT starts a SQL *Plus session, and issues the following query: SQL> SELECT * FROM sales; Which process would retrieve the result from the database and return it to the client program?() User process。 Server process。 System Monitor (SMON)。 Process Monitor (PMON)。 Checkpoint process (CKPT)。 基坑验槽时应仔细观察槽壁、槽底土质类型、均匀程度和有关异常土质是否存在,核对基坑土质及地下水情况是否与()相符。 设计图纸。 勘察报告。 施工方案。 钎探记录。 基准地价修正系数法从评估原理的角度划分可归属于()。 收益法。 成本扣除法。 市场法。 清算价格法。 底签上文字内容对(),应有化学名称及分子式 单一气体。 混合气体。 In which of the following situations should correlation names be used?()
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