Skip to main content

Featured Post

How to use Tabs in ASP.NET CORE

I want to show Components in a tabs , so first of all create few components. In this project we have three components, First View Component  public class AllViewComponent : ViewComponent     {         private readonly UserManager<ApplicationUser> _userManager;         public AllViewComponent(UserManager<ApplicationUser> userManager)         {             _userManager = userManager;         }         public async Task<IViewComponentResult> InvokeAsync()         {             List<StudentViewModel> allUsers = new List<StudentViewModel>();             var items = await _userManager.Users.ToListAsync();             foreach (var item in items)             {                 allUsers.Add(new StudentViewModel {Id=item.Id, EnrollmentNo = item.EnrollmentNo, FatherName = item.FatherName, Name = item.Name, Age = item.Age, Birthdate = item.Birthdate, Address = item.Address, Gender = item.Gender, Email = item.Email });             }            

How to Retrieve Specific Records by SQL Database: SQL Server

By-default when user fire a query on the sql database it provides all the columns in the output, the table have. Database developer can change the no. of columns, to be displayed in the output. Sql Server Management Studio provides some special features explained in the article.

Retrieving Specific Attributes

While retrieving data from tables, you can display one or more columns. For example, the Adventure Works database stores the department details, such as Name and GroupName in the Department table. Users might want to view single column such as Name. Programmer can retrieve the required data from the database tables by using the SELECT statement.

The SELECT statement is used for accessing and retrieving data from a database. The syntax of the SELECT statement is:

SELECT [ALL | DISTINCT] select_column_list
[INTO [new_table_name]]
[FROM {table_name |view_name}
[WHERE search condition]

 

Where
  • ALL: represented with an (*) asterisk symbol and displays all the columns of the table.
  • Select_column_list: name of the table from which data is to be retrieved.
Note:
The SELECT statement can contains some more arguments such as WHERE, GROUP BY, COMPUTE, and ORDER BY that will be explained in later articles. All the examples in this SQL related articles are based on the Adventure Works Database, and can be download from here.
Consider the department table stored in the HumanResources schema of the Adventure Works database. To display all the detail of employees, you can use the following query:
 

SELECT * FROM HumanResources.Department
 

Execute the query and SQL Server will display the output of the query, as shown in the following figure.

How to Retrieve Specific Records by SQL Database: SQL Server 
The result set displays the records in the order in which they are stored in the table. In other words the records are sorted in ascending order of DepartmentId that is primary key of the department table.
   
Note:

The number of rows in the output window may vary depending on the modifications done on the database.
If you need to retrieve specific columns, you can specify the column names in the SELECT statement. For example, to view specific details, such as only Name of the employees of AdventureWorks, you can specify the column names in the SELECT statement, as shown in the following SQL query:
   
SELECT DepartmentId, Name FROM HumanResources.Department

The SQL Server will display the output of the query, as shown in the following figure.


How to Retrieve Specific Records by SQL Database: SQL Server 
In the output, the result set shows the column names the way they are present in the table definition. You can customize these column names, if required. As same as in above sql query you can specify some more columns as per the requirements.

Customizing and Concatening display in SQL Server

Comments

Popular Post

Polynomial representation using Linked List for Data Structure in 'C'

Polynomial representation using Linked List The linked list can be used to represent a polynomial of any degree. Simply the information field is changed according to the number of variables used in the polynomial. If a single variable is used in the polynomial the information field of the node contains two parts: one for coefficient of variable and the other for degree of variable. Let us consider an example to represent a polynomial using linked list as follows: Polynomial:      3x 3 -4x 2 +2x-9 Linked List: In the above linked list, the external pointer ‘ROOT’ point to the first node of the linked list. The first node of the linked list contains the information about the variable with the highest degree. The first node points to the next node with next lowest degree of the variable. Representation of a polynomial using the linked list is beneficial when the operations on the polynomial like addition and subtractions are performed. The resulting polynomial can also

How to use Tabs in ASP.NET CORE

I want to show Components in a tabs , so first of all create few components. In this project we have three components, First View Component  public class AllViewComponent : ViewComponent     {         private readonly UserManager<ApplicationUser> _userManager;         public AllViewComponent(UserManager<ApplicationUser> userManager)         {             _userManager = userManager;         }         public async Task<IViewComponentResult> InvokeAsync()         {             List<StudentViewModel> allUsers = new List<StudentViewModel>();             var items = await _userManager.Users.ToListAsync();             foreach (var item in items)             {                 allUsers.Add(new StudentViewModel {Id=item.Id, EnrollmentNo = item.EnrollmentNo, FatherName = item.FatherName, Name = item.Name, Age = item.Age, Birthdate = item.Birthdate, Address = item.Address, Gender = item.Gender, Email = item.Email });             }            

Memory representation of Linked List Data Structures in C Language

                                 Memory representation of Linked List              In memory the linked list is stored in scattered cells (locations).The memory for each node is allocated dynamically means as and when required. So the Linked List can increase as per the user wish and the size is not fixed, it can vary.                Suppose first node of linked list is allocated with an address 1008. Its graphical representation looks like the figure shown below:       Suppose next node is allocated at an address 506, so the list becomes,   Suppose next node is allocated with an address with an address 10,s the list become, The other way to represent the linked list is as shown below:  In the above representation the data stored in the linked list is “INDIA”, the information part of each node contains one character. The external pointer root points to first node’s address 1005. The link part of the node containing information I contains 1007, the address of