What are transactions in sql?

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What is the difference between a primary key and a unique key? Are they the same?

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you have a table with close to 100 million records recently, a huge amount of this data was updated now, various queries against this table have slowed down considerably what is the quickest option to remedy the situation? : Sql server administration

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What is raid, and how it can influence database performance?

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find 2nd highest salary of person using cursor concept?

6 Answers   HCL,

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What do you mean by a Composite primary key?

0 Answers   Genpact,

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what are the steps you will take to improve performance of a poor performing query? : Sql server database administration

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* CREATE TABLE [dbo].[t_Colors]([ColorId] [int] NOT NULL,[ColorName] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL, [ColorDesc] [varchar](50) COLLATE SQL_Latin1_General_CP1_CI_AS NULL,[ColorIndex] [int] NULL) ON [PRIMARY] GO * insert into [t_Colors] values(101,'Red','',1) insert into [t_Colors] values(101,'Red1','',2) insert into [t_Colors] values(102,'Blue','',1) insert into [t_Colors] values(102,'Blue1','',2) insert into [t_Colors] values(102,'Blue2','',3) * In this table i need to delete DELETE FROM t_Colors WHERE ColorIndex=1 AND ColorId=102 After delete above condition i need to update the ColorIndex set to 1 for Blue1[ColorName] and 2 for Blue2[ColorName] select * from [t_Colors] Note:- how can i get updates the ColorIndex values after delete. for example we need to update Blue1 ColorIndex set to 1 and Blue2 ColorIndex set to 2

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What is data compression? : sql server database administration

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What are the differences between union, intersect, and minus operators?

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Describe in brief sql server monitoring ways.

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what is diffrent between store procedure and trigger

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