Can unique keys be null?

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Is clustered index a primary key?

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ex: take one schema in that t1,t2,.....tn tables and you don't no the table name also. write a procedure if enter columns name then display the maching columns .otherwise display the unmatch columns.

1 Answers   Zensar,

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1. what is the exact use of hint in sql. 2. How we can avoid index scan in sql even though index is there in the table.

1 Answers   Polaris,

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What does truncate mean in sql?

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what is the difference between myisam static and myisam dynamic? : Sql dba

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What is the sql query to display the current date?

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Types of indexes. What is the default key created when a primary key is created in a table ?

5 Answers   TCS,

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what is table? : Sql dba

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Is pl sql different from sql?

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What does trigger mean in slang?

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What are all the different normalizations?

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