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Which command is use to convert column values into column name?

Posted By :shankey     Posted Date :July 31, 2011    Points :40   Category :Others 
Pivot table is use to convert column values into column name. It can be use to rotate the table.

You can also find related Interview Question to Which command is use to convert column values into column name?  below: 

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 we can add Description to the Column using Sql Command?

  
We can Add Description to Column using sp_addextendedproperty System Store Procedure.
Sample Command to Insert Description for Column in a Table:

EXEC sys.sp_addextendedproperty @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...)

You have a column that will only contain values from 0 to 256. What's the most economical data type to use for the column?

A. TINYINT
B. SMALLINT
C. INT
D. DECIMAL(3)
E. VARCHAR(3)


  
Correct Answer : B
Explanation:-
------------
A SMALLINT data type uses only 2 bytes of data and can store value from -32,768 to 32,767. A TINYINT data type cannot be used because the maximum value it can hold is 255. Although an INT data type can be used, SMALLINT will use only 2 bytes compared to INT's 4 bytes. VARCHAR(3) will use 3 bytes while DECIMAL(3) will use 5 bytes.
(More...)

Will COUNT(column) include columns with null values in its count?

  
Yes, COUNT(column) include columns with null values in its count? (More...)

How to Rename a COLUMN Name

  
To rename a column ,in a query window execute sp_rename using the following formula:

sp_rename 'TableName.ColumnName', 'NewColumnName', 'COLUMN'


The sp_rename factor and the 'COLUMN' string are required.
The TableName factor is the name of the table that the column belongs to. The ColumnName is the current name of the column. The NewColumnName is the desired name you want to give to the column.

eg:
sp_rename 'Emp.Employeename','Ename','COLUMN'
(More...)

Which property on a Combo Box do you set with a column name, prior to setting the Data Source, to display data in the combo box?

  
ComboBox.DataValueField = "ColumnName"

When we use Databind method for the Combo box we set Display Member and Display Value property to column name. (More...)

How to get the column count of a report?

  
SY-LINSZ system variable gives the column count (line size) and SY-LINCT for line count. (More...)

How to add auto increment column in the DataTable?

  
To add auto increment column in the DataTable, we can set the AutoIncrement property of the DataColumn object as true and specify the seed value after adding that field into the DataTable object.
// create columns for the DataTable

DataTable dTable = new DataTable();

DataColumn auto = new DataColumn("AutoID", typeof(System.Int32));

dTable.Columns.Add(auto);

// specify it as auto increment field

auto.AutoIncrement = true;

auto.AutoIncrementSeed = 1;

auto.ReadOnly = true; (More...)

How you will Hide Column(s) in the Windows Forms DataGridView Control?

  
Set the DataGridViewColumn.Visible property to false.

vb.net:
-------
dataGridView1.Columns("CustomerID").Visible = False

c#.net:
------
dataGridView1.Columns["CustomerID"].Visible = False; (More...)

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