河北高考数学考试难度分析（历年真题剖析，备战高考必备）
数学作为高考必考科目之一，对于考生来说是一个必须认真备考的科目。本文将从历年河北高考数学真题入手，对考试难度进行分析，为考生备战高考提供必要的指导。1. 难度趋势分析从历年来看，河北高考数学难度整体呈现出逐年增加的趋势。特别是近几年，试题难度较往年都有所增加，而且难度系数波动较大。2. 试题类型分析河北高考数学试题类型较为丰富，涵盖了代数、几何、概率等多个方面。其中，代数题目数量较多，难...
2024-02-27
投资模拟器高考答案大全 考试数独拼图题目答案汇总
投资模拟器高考答案是什么，相信还有很多小伙伴都在询问，那么最新题目大家如何选择正确答案呢，接下来为大家分享具体的攻略内容。投资模拟器考试数独拼图题目答案健身房办卡后永久免费，每天的精力用完比较好，完后自动(免费)回家，还回复满精力。猴子介绍的对象，猫猫，手机上...
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设定考试教室布局50个，自动排位，须前后左右都不是本班学生，这个问题的解决思路是啥？
现在就是这个前后左右不是本班学生要如何实现，有没有好的解决思路。回答：建议参考【八皇后问题】回溯算法。...
2024-01-10
【2019年8月版】OCP071认证考试原题第42题
Choose twoExamine this SQL statement:DELETE FROM employees eWHERE EXISTS(SELECT "dummy"FROM emp_historyWHERE employee_id = e.employee_id)Which two are true?A) The subquery is executed for every row in the EMPLOYEES table.B) The subquery is not a correlated...
2024-01-10
【2019年8月版】OCP071认证考试原题第40题
Choose two.Which two statements are true about single row functions?A) CONCAT : can be used to combine any number of valuesB) MOD : returns the quotient of a division operationC) CEIL : can be used for positive and negative numbersD) FLOOR : returns the sm...
2024-01-10
【2019年8月版】OCP071认证考试原题第41题
choose threeThe 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 of the ORDERS table.The constraint is defined with on DELETE CASCADE.Ther...
2024-01-10
【2019年8月版】OCP071认证考试原题第39题
Choose twoExanine the desatption of the BOOKS_TRANSACTIONS tableName Null? Type----------------------------------------------------------------------------------------------TRANSACTION_ID NOT NULL VARCHAR2(6)TRANSACTION_TYPE VARCHAR...
2024-01-10
【2019年8月版】OCP071认证考试原题第37题
Choose the best answerExamine the description of the PRODUCT_INFORMATION table:Name NULL? Type------------------------------------------------------------------------PROD_ID NOT NULL NUMBER(2)PROD_NANE VARCRAR2 (10)LIST_PRICE ...
2024-01-10
【2019年8月版】OCP071认证考试原题第35题
choose twoWhich two statenents are tue about the COUNT function?A) It can only be used for NUMBER data types.B) COUNT (DISTINCT inv_amt) returns the number of rows excluding rows containing dupicates and NULLs in the INV_AMT columnC) COUNT(*) returns the n...
2024-01-10
【2019年8月版】OCP071认证考试原题第33题
Choose three.Which three statements are true about a self join?A) It must be an inner join.B) It can be an outer join.C) The ON clause must be used.D) It must be an equijoin.E) The query must use twodifferent aliases for the table.F) The ON clause can be u...
2024-01-10
【2019年8月】OCP071认证考试最新版本的考试原题第29题
choose two.·MANAGER is an existing role with no privileges or roles.·EMP is an existing role containing the CREATE TABLE privilege.·EMPLOYEES is an existing table in the HR schema.Which two commands execute successfully?A) GRANT CREATE SEQUENCE TO manager,...
2024-01-10
【2019年8月】OCP071认证考试最新版本的考试原题第28题
choose twoThe ORDERS table has a column ORDER_DATE of date type DATEThe default display format for a date is DD-MON-RRWhich two WHERE conditions demonstrate the correct usage of conversion functions?A) WHERE ordet_date > TO_CRAR(ADD_MONTHS(SYSDATE, 6), "MO...
2024-01-10
