Explain UNION,MINUS,UNION ALL, INTERSECT?

1 Answers  

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consider a table which contain 4 columns,ename,eno,sal and deptno, from this table i want to know ename who having maximum salary in deptno 10 and 20.

24 Answers   Mind Tree,

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Explain isolation levels. : Transact sql

0 Answers  

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Can primary key be changed?

0 Answers  

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Difference between global and parameter variables?

0 Answers   TCS,

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How do you identify a primary key?

0 Answers  

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What is java sql drivermanager?

0 Answers  

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How does an execution block start and end in pl sql?

0 Answers  

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Two Methods of retrieving SQL?

7 Answers   Atiric Software, Microsoft, Oracle, TCS, Wipro,

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What are character functions in sql?

0 Answers  

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How do sql triggers work?

0 Answers  

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Write an sql query to select all records from the table?

0 Answers  

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