amazon.in
browser----http request---server---ms .net---sql--database(ms sql server/oracle/mysql/db2/ms access)
sql-structured query langauage
database-collection of tables
table-collection of rows and columns
types of sql
1.DDL-(Data Defination Langauage)-create,alter,drop
2.DML-(Data Manipulation Langauge)-insert,update,delete
3.DQL-(Data Query Lanaguage)select
4.TCL-(Transcation Control Langauage)commit,rollback
5.DCL-(Data Control Langauage)-grant,revoke