How to divide query output into multiple groups with the group by clause in ms sql server?

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Is foreign key unique?

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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 sql language?

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What is an identity?

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Can foreign key be duplicate?

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Can you explain how long are locks retained within the repeatable_read and serializable isolation levels, during a read operation with row-level locking?

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Do you know what is difference between index seek vs. Index scan?

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How do I compare two values when one value(data type) is char and the other is an integer?

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What is indexed view?

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Does full backup break log chain?

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What is the difference between indexing and hashing?

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