What is materialized view in sql?

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one of the column in my table contains the data like SAL ---- 1000 1000 2000 3000 3000 So my requirement is i want output like SAL --- 1000 2000 3000 it mean i want to delete duplicate rows in the table permanently and i want output in the above formatow should u write query?

13 Answers   Cap Gemini, TCS,

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4. Select sum(A.salary) +sum(B.salary) as TOT_SAL from ( select LEVEL emp_id,level*100 salary,case when mod (level,2)=0then 2 else null end dept_id from dual connect by level<6 )A right outer join (select level emp_id ,level*200 salary ,case when mod (level,3)=0 then 2 else null end dept_id from dual connect by level<6)B On A.dept_id=B.dept_id And A.emp_id=B.emp-id;

1 Answers   Fintellix,

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How to display the contents of a current record fetched in a reference cursor?

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What are the disadvantages of file system?

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What does an inner join do?

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What is indexing in sql and its types?

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What are the different types of database management systems?

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What does cursor do in sql?

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How many types of cursors are available in pl/sql?

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Can we join tables without foreign key?

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Is sql considered coding?

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