Answer Posted / amit

Any no. of times you can insert null values in a coulmn
whihc is unique constraint because a Null value is
undefined,unassigned,and unapplicable value so thats why we
cannot compaire with any other null value or other value.

how many tables will create when we create table, what are they? : Sql dba

1052

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How do you declare a constant?

946

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What is data types in sql?

983

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Does a join table need a primary key?

941

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Is a table valued function object?

999

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What is the use of function "module procedure" in pl/sql?

1182

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Can we use having without group by in sql?

965

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How do I send sql query results to excel?

1048

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956

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1004

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list out some tools through which we can draw e-r diagrams for mysql. : Sql dba

953

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how can you see all indexes defined for a table? : Sql dba

975

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how to get help information from the server? : Sql dba

918

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Can we have two clustered index on a table?

1011

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What is sharding in sql?

956

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