oracle oca exam questions

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number and find the average score for each group of passing persons (grade >= 60) (average number of passing persons per course)3. Ask for an average of all courses for each student4. The average score for each student (exam result) Pass Course5. Average score for each student in each internal test (average of each course per learner)6. Check the average score of the students who have done the exam (find o

more efficient. What does DDL and DML stand for? Answer: ddl:date definition Language (data definition language), including alter, rename, create, drop ...Dml:date manipulation Language (Data manipulation language) What statements does Oracle use to assign permissions to users? Answer: Grant......to ...Three, there is an Employee form EMP (ENO,ENAME,SALARY,DNO), wherein the meaning of each field is the employee number, nam

activity C, two options are not correct D, two options are correct How to deliver a message to a running service () A, by registering receiver B, through intent C, by defining the Aidl interface D, are correct When a video or audio is playing, will the video or audio automatically hang when a call is reached? （） A, will not B, will C. Some hand opportunities, some mobile phone will not D. All the above is wrong How to support language internationalizati

Oracle: OCA-047-solution and experiment, the MERGE statement is a new syntax for Oracle9i to merge update and INSERT statements. Use the MERGE statement to query a table or subquery Oracle: OCA-047-solution and experiment, the MERGE statement is a new syntax for Oracle9i to merge update and INSERT statements. Use the

where E1.mgr =E2.empno (+);Find two jobs with the highest average wage, grouped by positionSELECT * FROM (select AVG (SAL) from emp order BY job desc) where rownumselect= "D.dname=" "from=" "emp=" "dept=" "d=" "where=" "and=" "E.sal=" "> (selectMax (SAL) fromEMP where deptno=20) and E.deptno=d.deptnoJob categories with average wage greater than 20002018/5/31 Oracle Database interview Written questions summ

5 Servlet 80 For readability, the results after querying this table are explicitly as follows (passing score is 60), please write out the SQL implementation statement CourseID Coursename Score Mark 1 Java 70 Pass 2 Oracle 90 Pass 3 Xml 40 Fail 4 Jsp 30 Fail 5

Course ObjectivesShare how to gain access to Oracle's OCP certification and exam process pits: Let's learn how to pass the Oracle OCP exam and how to obtain a OCP certificate. Applicable peopleIt related personnel, college students Course Introduction Share how to gain access to Oracle's OCP certification and exam