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全部博文（487）
发布时间：2019-10-28 16:19:47
Examine this business rule:You must desion an Entity Relationsep (ER) model for optional data storage and allow generating reports in this format:Which two statements are true?B) The ER must have a many-to-many relationship between the STUDENTS and PROJECTS entities that must be resolv.........【阅读全文】
发布时间：2019-10-25 14:59:53
Examine this partial command:cust_id NUMBER(2),)Which two clauses are required for this command to execute successfully?B) the REJECT LIMIT clauseD) the ACCESS PARAMETERS clauseAnswer：AD......【阅读全文】
发布时间：2019-10-25 14:13:42
Examine the description of the PRODUCTS table:-----------------------------------------------------------------PRODUCT_NANE VARCHAR2(10)PURCHARGE &nb.........【阅读全文】
发布时间：2019-10-23 15:34:54
Examine this SQL statement:SET customer_name =FROM customersWhich two are true?B) All existing rows in the ORDERS table are updated.D) The UPDATE statement executes successfully even if the subquery selects multiple rows.Answer：BD关联子查询：2、 然后子查询返回的结.........【阅读全文】
发布时间：2019-10-23 14:48:20
Examine this query:What is the result?B) 160D) 200Answer：D(解析：关键就是 round 函数，0 是小数点左边第一位，以此类推。)......【阅读全文】
