INTRODUCTION TO SQL
- Pronounced as SEQUEL: Structured English QUERY Language.
- Designed and developed by IBM, Implemented by Oracle.
- Accepted by both ANSI + ISO as Standard Query Language for any RDBMS.
- Supports all the three sublanguages of DBMS: DDL, DML, DCL, TCL, etc
- Create database "DatabaseName " like Create database student_info
CREATE A TABLE / RELATION
- SYNTAX
- CREATE TABLE table_name
- ( column1 datatype,
- column2 datatype,
column3 datatype )
SQL QUERY TO CREATE A TABLE
- CREATE TABLE Student_recoed (
PersonID int,
LastName varchar(255),
FirstName varchar(255), - Class varcahr(255),
Address varchar(255),
City varchar(255)
);
OUTPUT
| PersonID | LastName | FirstName | CLASS Address | City |
|---|---|---|---|---|
- SYNTAX
- INSERT INTO table_name VALUES (value1, value2, value3, ...);
SQL QUERY TO INSERT RECORDS
- INSERT INTO VALUES (01 , 'SHAIKH', 'KHALID', 'GRADUATE ', 'NF', 'TS');
| PersonID | LastName | FirstName | CLASS Address | City |
|---|---|---|---|---|
| 1 | SHAIKH | KHALID | GRADUATE NF | TS |


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