what are the advantages of primary key over unique+notnull

7 Answers   Consultancy, LGS, Oracle,

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Do triggers have restrictions on the usage of large datatypes, such as long and long raw?

0 Answers  

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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 CAN I FIND MAX SAL ,ENAME FROM EMP TABLE.

16 Answers  

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What view means?

0 Answers  

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How is debugging done?

0 Answers  

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What is the full form of sql?

1 Answers  

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How do I start sql profiler?

0 Answers  

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What is a table in a database?

0 Answers  

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What are the types of optimization?

0 Answers  

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which tcp/ip port does sql server run on? : Sql dba

0 Answers  

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What is oracle sql called?

0 Answers  

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