What is SQL Server?
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SQL, or Structured Query Language, is used for storing, accessing, and manipulating data in relational databases and was developed by IBM in the early 1970s. It includes commands for creating, reading, updating, and deleting data, utilized by various database management systems like MySQL and Oracle. The document outlines SQL syntax and commands, such as CREATE, INSERT, UPDATE, and DELETE, providing examples for each operation.
What is SQL Server?
- 1. CPD TECHNOLOGIESTM -An ISO 9001: 2008 Certified Email: [email protected] Add:- Block C-9/8, Sector -7, Rohini, Delhi 110085, India
- 2. What is SQL? SQL stands for Structured Query Language. Its main aim to store, access and mainpulate data in realtional database. SQL was developed at IBM company by Donald D. Chamberline and Reymond F.Boyce. In early 1970s. All relational database management system like MySQL, MS Access, Oracle and SQL server use SQL as astandered database langauge.
- 3. SQL MySQL ORACLE SQL Server
- 4. USES of SQL • SQL is used to communicate with a database • Used to perform task such as insert data, update data in database. • A tool to retrieve the required information from database.
- 5. SQL Language Statement ›Clause: The clause are component of the statement and queries. ›Expression: A combination of symbol and operators that the database system evaluates to obtain a single data value ›Queries: Queries are used to give command to server to perform specific task.
- 6. What SQL can Do? SQL Create Read Update Delete
- 7. (DDL) Command Description CREATE Create a new table and a view of a table ALTER Modify an existing database object, such as table. DROP Delete an entire table, a view of a table or other object in database.
- 8. Data Manipulation Language (DML) Command Description SELECT Retrieve certain record from one or more table. INSERT Create a record UPDATE Modify records DELETE Delete records
- 9. Data Control Language (DCL) Command Description GRANT Gives a privilege to user REVOKE Take back privilege granted from user
- 10. SQL Syntax Select * from Student; The above SQL Statement select all records in the “Student” table: Name Program Enrollment Number Harsha MCA 126901230 Deepak BCA 125689023
- 11. CREATE Statement Create database databaseName; Create table Student ( Name varchar(20), //Name has varchar Datatype having size of 20 charecter Program varchar(10), Enrol_No int //Enrol_No has integer datatype )
- 12. INSERT Statement The following SQL statement insert data into student table. Insert into Student(Name, Program, Enrol_No) values(‘Aman’, ‘B.Com’, 134567890);
- 13. DROP Statement The following statement is used to drop Database and Table. Drop database databaseName; //delete database Drop table Student; //delete table from database
- 14. UPDATE Statement Update Student Set Name=‘Anamika’ Where Enrol_No= 126901230 //Condition
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