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复制到BLOG图片等均不好处理，一次也不能复制太多，我直接将题库上传上。 https://download.youkuaiyun.com/download/QIDANIEL/12009829 QUESTION 55 Choose two Examine this query: SELECT employee_id,first_name,salary FROM employees WHERE hire_date...

QUESTION 51 Choose two Which two statements are true about conditional INSERT ALL? A) Each row returned by the subquery can be inserted into only a single target table. B) It cannot have an ELSE claus...

QUESTION 46 Choose three Which three are true about dropping columns from a table? A) A column can be removed only if it contains no data. B) A column drop is implicitly committed C) A column that is ...

QUESTION 41 choose three The ORDERS table has a primary key constraint on the ORDER_ID column. The ORDER_ITEMS table has a foreign key constraint on the ORDER_ID column, referencing the primary key...

QUESTION 1 Choose the best answer. Exanine the desciption of the EMPLOYEES table: Nane Null Type EMP_ID NOT NUL NUMBER EMP_NAME VARCHAR2 (40)...