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How to Rename or Drop User-Defined Database in SQL Programming

Renaming a User-Defined Database

After creating a user-defined database in SQL server, programmer can rename a database whenever required. Only a system administrator or the database owner can rename a database. The sp_renamedb stored procedure is used to rename a database. The syntax of the sp_renamedb statement is:

Sp_renamedb old_database_name, new_database_name

  • old_database_name is the current name of the database
  • new_database_name is the new name of the database 
For example, the following SQL query renames the Personnel database.
Sp_renamedb Personnel Personnel1

Dropping a User-Defined Database

Programmer can delete a database when it is no longer required. This causes all the database files and data to be deleted. Only the users with sysadmin role and the database owner have the permissions to delete a database. The syntax of the DROP DATABASE statement is:

DROP DATABASE database_name
Database_name is the name of the database.

The following SQL query deletes the Employee database:

Programmer cannot delete a system-defined database. Programmer can rename or delete a database using the Object Explorer window by right-clicking the Databases folder and selecting the Rename or Delete option from the shortcut menu.
Create User-Defined Database 


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SQL Video Channel : Download all SQL Video

Binary Search Linear Search Works only on sorted items. such as  1,2,3,4,5,6  etc
Works on sorted as well as unsorted items. 12,4,5,3,2,1 etc Very efficient if the items are sorted Very efficient if the items are less and present in the beginning of the list. such as Suppose your list items are : 12,3,4,5,1 and you want to search 12 number then you get beginning in the list. Works well with arrays and not on linked lists. Works with arrays and linked lists.
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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 next node. The last node …