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How to select records from a table where some column names are duplicate and some are different ?

Posted By :volvo     Posted Date :December 26, 2013    Points :40   Category :Sql Server 
select * from table as A, table as B where A.field1=B.field1 and A.field2=B.field2 and A.field3<>B.field3

You can also find related Interview Question to How to select records from a table where some column names are duplicate and some are different ?  below: 

How to select all duplicate records from a table ?

  
select field, count(field) from TableName group by field having count(*) > 1

where two (or more) records are considered duplicates if they having a common value for a single field (More...)

How To retrive Duplicate Records when There is no Primary key in a Table?

  
select city_name
from areas
group by city_name

having count(*) > 1 (More...)

Would the select query below fetch any records?



create table #testvm (ID int)

select * from sysobjects where name = '#testvm'

drop table #testvm

  
No..

Since temp tables are created in tempdb, and use a random name, the query will not work.

If you used a query like this, you would see your table:

select * from tempdb..sysobjects where name like '#testvm%' (More...)

How To Update Description Value for a Column in Table using SQL Command?

  
We can Update Description to Column using sp_updateextendedproperty System Store Procedure.
Sample Command to Update Description for Column in a Table:

EXEC sys.sp_updateextendedproperty @name=N'MS_Description', @value=N'My Description for Column Here' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'MyTableName', @level2type=N'COLUMN',@level2name=N'ColumnName' (More...)

How To Delete Description Value for a Column in Table using SQL Command?

  
We can Delete Description from Column using sp_dropextendedproperty System Store Procedure.
Sample Command to Delete Description from Column in a Table:

EXEC sys.sp_dropextendedproperty @name=N'MS_Description', @value=N'My Description for Column Here' , @level0type=N'SCHEMA',@level0name=N'dbo', @level1type=N'TABLE',@level1name=N'MyTableName', @level2type=N'COLUMN',@level2name=N'ColumnName' (More...)

How To Get Description Value for all Column in Table using SQL Command?

  
To Get Description of Columns we need to use system function sys.fn_listextendedproperty.
Command To Get Description Data for all Columns:

SELECT * FROM fn_listextendedproperty(NULL, 'SCHEMA',
'dbo', 'TABLE', 'YourTable Name Here', 'COLUMN', NULL) (More...)

How To Get Description Value for Single Column in Table using SQL Command?

  
To Get Description of Single Column we need to use system function sys.fn_listextendedproperty. we need to pass the column Name is this case.
Command To Get Description Data for Single Columns:

SELECT * FROM fn_listextendedproperty(NULL, 'SCHEMA',
'dbo', 'TABLE', 'Table Name Here', 'COLUMN', 'Column Name Here') (More...)

More than one IDENTITY column per table can be exist in SQL Server . (True /False)

  
False.
There can only be one IDENTITY column per table in SQL Server.
Its auto Incremented Column defined by the user. (More...)

how to find column name from sql server table?

  
select * from INFORMATION_SCHEMA.Columns where column_name like 'colname%' (More...)

How to get last five minuts records from Oracle Databse table?

  
select col_datetime,sysdate from tblname where trunc(col_datetime)=trunc(sysdate) and to_char(col_datetime,'dd-mm-yyyy hh24:mi:ss')>to_char(sysdate- interval '05' minute,'dd-mm-yyyy hh24:mi:ss')
(More...)

If you 1Lakh records of employee in a table, then how will you get the 4th highest salary from the table?

  
SELECT TOP 1 * FROM [EmpTable] WHERE [salary] NOT IN (SELECT DISTINCT TOP 3 salary FROM [temp1] ORDER BY [salary] DESC) ORDER BY salary DESC (More...)

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