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  1. Categories >> Software >> Databases >> SQL PLSQL
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what is auto increment? : Sql dba

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More SQL PLSQL Interview Questions

how to get enames with comma seperated values by deptwise on emp table?

8 Answers  

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,

How many columns should be in an index?

0 Answers  

Does oracle roll back the transaction on an error?

0 Answers  

What is the difference between SQL Constraint and PL/SQL constraint.Pls give all the constraint name.

3 Answers   TCS,

Can ddl statements be used in pl/sql?

0 Answers  

What is a dynamic query?

0 Answers  

Types of cursor locks and explanation each of them ?

3 Answers   DELL, HP Finsoft,

Can we rollback after truncate?

0 Answers  

What is nosql db?

0 Answers  

Give the structure of the procedure ?

1 Answers  

What are the different types of dbmss?

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