How many types of primary keys are there?

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how to find the First and Last Observation from the table: Ex: OBS Name Sal Ans like: OBS Name Sal 105 E 5000--> 105 E 5000 102 B 2000 104 D 4000 103 C 3000 101 A 1000--> 104 D 4000

4 Answers  

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What is foreign key in sql with example?

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How to count the no of records of a table without using COUNT function?

11 Answers   TCS, Tesco,

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How many sql databases can you have on one server?

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How do you create a unique index?

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What is sql and also describe types of sql statements?

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What will happen after commit statement ?

2 Answers  

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Can we edit a view in sql?

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What is trigger and how to use it in sql?

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Write a unique difference between a function and a stored procedure.

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What are the features of pl sql?

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