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 ... Read More]]> To rename a column, first open an empty query window. 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.

Here is an example:

sp_rename 'StaffMembers.FullName', 'EmployeeName', 'COLUMN'
GO

When this code is executed, the interpreter will look for a column named FullName in the StaffMembers table of the current or selected database. If it finds that column in the table, then it renames it EmployeeName.

On the right side of the ALTER TABLE expression, type the name of the table. On the right side of the DROP COLUMN expression, enter the name of ... Read More]]> To delete a column using code, first open or access an empty query window, and use the following syntax:

ALTER TABLE TableName
DROP COLUMN ColumnName

On the right side of the ALTER TABLE expression, type the name of the table. On the right side of the DROP COLUMN expression, enter the name of the undesired column. Here is an example:

ALTER TABLE Members
DROP COLUMN CurrentResidence;
GO

When this code is executed, the interpreter will look for a column named CurrentResidence in a table named Members of the current or selected database. If it finds that column, it will remove it from the table.

To create an identity column in Transact-SQL, after the name and data type of the column, type identity ... Read More]]> An identity column is one whose value is automatically created by the database engine when a new record is added. This makes sure that each record has a unique value for that field.

To create an identity column in Transact-SQL, after the name and data type of the column, type identity followed by parentheses. Between the parentheses, enter the seed value, followed by a comma, followed by the increment value. Here is an example:

CREATE TABLE Store(
    ItemID int IDENTITY(1, 1) NOT NULL,
    Category nvarchar(50),
    ItemName nvarchar(100) NOT NULL,
    Size nvarchar(20),
    UnitPrice money);
GO

To add a new column to a table, follow this syntax:

Here is an example:

When above code is executed, a new column named Address, of type varchar, with a limit of 100 characters, and that allows empty entries, would be added to the ... Read More]]>  

To add a new column to a table, follow this syntax:

ALTER TABLE TableName
ADD ColumnName Properties

Here is an example:

ALTER TABLE Members
ADD Address varchar(100) NULL
GO

When above code is executed, a new column named Address, of type varchar, with a limit of 100 characters, and that allows empty entries, would be added to the table named Members.

Here is an example:

To delete a database, you use the DROP DATABASE expression followed by the name of the database. The formula used is:

Here is an example:

To ... Read More]]> Creating a Database

To create a database in SQL, use the following syntax:

CREATE DATABASE DatabaseName

Here is an example:

CREATE DATABASE BethesdaCarRental;

Deleting a Database

To delete a database, you use the DROP DATABASE expression followed by the name of the database. The formula used is:

DROP DATABASE DatabaseName;

Here is an example:

DROP DATABASE RealEstate1;

GO

Renaming a Database

To change the name of a database  , Transact-SQL provides sp_renamedb. The formula used would be:

EXEC sp_renamedb ‘ExistingName‘, ‘NewName’

The EXEC sp_renamedb expression is required.

The ExistingName factor is the name of the database that you want to rename.

The NewName factor is the name you want the database to have after renaming it.

Here is an example of renaming a database:

EXEC sp_renamedb 'RentalCars', 'BethesdaCarRental

GO

Creating a Table

To create a table, you can follow this syntax:

CREATE TABLE Country(Column1, Column2, Column3)

or:

CREATE TABLE Country(

Column1,

Column2,

Column3);

Each column is created as:

ColumnName DataType Options

Here is an example:

CREATE TABLE Customers (

               DrvLicNbr nvarchar(32),

               DateIssued DATE,

               DateExpired date,

               FullName nvarchar(50),

               Address NVARCHAR(120),

               City NvarChar(40),

               State NVarChar(50),

               PostalCode nvarchar(20),

               HomePhone nvarchar(20),

               OrganDonor BIT);

GO

Deleting a Table

To delete a table using SQL, use the following syntax:

DROP TABLE TableName

The DROP TABLE expression is required and it is followed by the name of the undesired table. Here is an example:

DROP TABLE Students;

GO

Renaming a Table

To rename a table using code, execute the sp_rename stored procedure using the following syntax:

sp_rename ExistingTableName, TableNewName;

Here is an example:

sp_rename 'StaffMembers', 'Employees';

GO

Creating a View

To programmatically create a view, you use the following SQL syntax:

CREATE VIEW ViewName

AS

SELECT Statement

Example:

CREATE VIEW dbo.ListOfMen

AS

SELECT dbo.Genders.Gender,

       dbo.Persons.FirstName, dbo.Persons.LastName

FROM   dbo.Genders INNER JOIN dbo.Persons

ON     dbo.Genders.GenderID = dbo.Persons.GenderID

WHERE  (dbo.Genders.Gender = N'Male');

GO

Modifying a View

ALTER VIEW ViewName

AS

SELECT Statement

Example:

ALTER VIEW dbo.ListOfMen

AS

SELECT dbo.Persons.FirstName, dbo.Persons.LastName

FROM   dbo.Genders INNER JOIN dbo.Persons

ON     dbo.Genders.GenderID = dbo.Persons.GenderID

WHERE  (dbo.Genders.Gender = N'Male');

Deleting a View

DROP VIEW ViewName

Example:

DROP VIEW dbo.ListOfMen

But you can do it with a simple trick e.g. you ... Read More]]> This is a general requirement to count number of words in a column of a MySQL database table. But MySQL does not have any built in function to count number of words as it generally has for number of purposes.

But you can do it with a simple trick e.g. you have a column name and want to count number of words in it. This query will return number of words separated with space in a column

SELECT SUM( LENGTH(name) – LENGTH(REPLACE(name, ‘ ‘, ”))+1) FROM table

If you want to count number of words separated by some other string for example comma (,) or semicolon (;), simply replace space with your required character.

CREATE PROCEDURE sp_chkadmin @login_id varchar(50), @password varchar(50) as begin select * from where login_id = @login_id and password =@password end

GO

protected void butlogin_ServerClick1(object sender, EventArgs e) {

string username = txtlogin.Value.ToString().Replace(“‘”, “””); string password = txtpassword.Value.ToString().Replace(“‘”, “””); int isUserExist=0; isUserExist = IsUserExist(username, password); if (isUserExist == 1) { Session["admin"] = username; Response.Redirect(“next.aspx”); } else { lblhead.Text = “Please Enter Correct Username or Password ... Read More]]> Create store procedure in sql query analyser

CREATE PROCEDURE sp_chkadmin
@login_id varchar(50),
@password varchar(50)
as begin
select * from where login_id = @login_id and password =@password
end

GO

protected void butlogin_ServerClick1(object sender, EventArgs e)
{

string username = txtlogin.Value.ToString().Replace(“‘”, “””);
string password = txtpassword.Value.ToString().Replace(“‘”, “””);
int isUserExist=0;
isUserExist = IsUserExist(username, password);
if (isUserExist == 1)
{
Session["admin"] = username;
Response.Redirect(“next.aspx”);
}
else
{
lblhead.Text = “Please Enter Correct Username or Password !”;
lblhead.Visible = true;
}

}

public int IsUserExist(string id,string pass)
{
string CONN_STRING = System.Configuration.ConfigurationSettings.AppSettings["urlString"]
.ToString();//”provider=sqloledb;server=aaa;uid=aa;pwd=aa;”;
SqlConnection conn = new SqlConnection(CONN_STRING);
SqlCommand cmd = new SqlCommand();
SqlDataAdapter da = new SqlDataAdapter();
DataSet ds =new DataSet() ;

int iRows = 0;
try
{
cmd.Connection = conn;
if (conn.State == ConnectionState.Closed) conn.Open();
// conn.Open();
cmd.Parameters.Clear();

cmd.CommandType = CommandType.StoredProcedure;
cmd.CommandText = “sp_chkadmin”;

cmd.Parameters.Add(new SqlParameter(“@login_id”, SqlDbType.VarChar));
cmd.Parameters["@login_id"].Value = id;

cmd.Parameters.Add(new SqlParameter(“@password”, SqlDbType.VarChar));
cmd.Parameters["@password"].Value = pass;

da.SelectCommand = cmd;
iRows = Convert.ToInt32(cmd.ExecuteScalar());
}
catch (Exception ex)
{

}
finally
{
if (conn.State == ConnectionState.Open) conn.Close();
}
return iRows;
}

CREATE trigger [TRIGGER_Deletesubcategory] ON dbo.category

FOR delete

AS

declare @nmid int

select @nmid=sno from deleted

delete from subcategory where cat_id= @nmid

There will be two table one is category and second one is subcategory and the primery key of category table will be sno and the this will foreign key(cat_id) for subcategory table.

solution: declare @a varchar(500) set @a = ‘ ‘ select @a = @a + cast(id as varchar(20)) + ‘,’ from tablename if ... Read More]]> Return Multi Row value in a single column with comma seprated using sql
I want Return output like 1,2,3,4,5 using sql.
There is one table in which has column
id name
1 Dilip
2 Dinesh
3 Varun
4 Dhanpat
5 Renuka

solution:
declare @a varchar(500)
set @a = ‘ ‘
select @a = @a + cast(id as varchar(20)) + ‘,’ from tablename
if len(@a)>1
set @a= left(@a,len(@a)-1)
select case @a when ” then ‘0′ else @a end as id

Use case , becaue may be there is no any value in this table so it will retun o