Table :
* It
is the collection of rows and columns , row can be called record or touple .
Column can be called field or attribute
*
The insertion of row and column can be called as cell , a cell is a place where
we can store our data
*
The other name of table can be called as entity
Rules for naming a
table :
* A
table name can have maximum upto 30 charecters
*
Alphabets from A to Z , a to z and numbers from 0-9 are allowed
* A
name should begin with alphabet
*
SQL reserved words are not allowed
*
The use of special characters like '_' is allowed and also recommended, the
special characters like #,$ are allowed in ORACLE but not in SQL Server .
* A
table can have minimum 1 column, maximum 1024 columns
* We
can enter 'n' number of records into the table i.e upto hard disk capacity , it
means that table contain minimum 0 Records,
maximum number of records .
how to see the
structure of the table
To see the structure of the table we can use one system
defined stored procedure
sp_help
<Table-Name>
Structure=Definition, structure or definition means
columns in the table
nice explanation... very informative
ReplyDeleteThanks Lakshmi.
ReplyDelete