When we can declare a column as Unique and Not Null both at the same time. What is the use pf Primary Key then?

2 Answers   Accenture, Unisoft Infotech,

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Are sql views compiled?

1 Answers  

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What is difference between mysql and postgresql?

0 Answers  

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How do you explain an index?

0 Answers  

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explain the options of myisamchk to improve the performance of a table. : Sql dba

0 Answers  

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Explain the working of primary key?

0 Answers  

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Why cross join is used?

0 Answers  

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Write the sql query using dual table for below output? 1 L R --- --- ---- 1 1 1 1 2 1 1 3 1 1 1 2 1 2 2 1 3 2 1 1 3 1 2 3 1 3 3 Write a query using only Dual table with out writing any pl/sql program.

3 Answers   JPMorgan Chase,

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In pl/sql, what is bulk binding, and when/how would it help performance?

0 Answers  

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What is the most important ddl statements in sql are?

0 Answers  

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What is having clause in sql?

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What is primary key and foreign key with example?

0 Answers  

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