How can we store rows in PL/SQL using array?

0 Answers   MCN Solutions,

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IN A TABLE HAVE ONE COLUMN PRIMARY KEY..IT WILL NOT ALLOWS NULL VALUES AND DUPLICATE VALUES..INSTEAD OF PRIMARY KEY WHY CANT WE USE UNIQUE AND NOT NULL.THESE TWO ALSO DOESNT ACCEPT NULL VALUES IN NOT NULL AND UNIQUE DOESNT ACCEPT DUPLICATE VALUES? SO WHAT IS THE DIFEERENCE BETWEEN(UNIQUE,NOT NULL) AND PRIMARY KEY??????

8 Answers   rsystems,

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what are the system privileges that are required by a schema owner (user) to create a trigger on a table?

0 Answers  

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Difference between aggregate function and analytical function?

3 Answers   Metric Stream,

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what is the difference between delete and truncate statement in sql? : Sql dba

0 Answers  

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how to select first 5 records from a table? : Sql dba

0 Answers  

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what is datawarehouse? : Sql dba

0 Answers  

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Give the order of sql select?

0 Answers  

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What is sql and how does it work?

0 Answers  

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What is procedure explain with example?

0 Answers  

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Explain what is a field in a database and record in a database?

0 Answers  

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What is ON DELETE CASCADE?

3 Answers  

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