Columns :
• A column is a set of data values of a particular
simple type
• When you create a table its each columns have a column name, a valid
data type, and a width
• A table has a specified number of
columns specified by the user.
• Different Constraints are applied
to the columns while the creation of the tables
• Eg: not null,unique,primary key ,
foreign key constraint …
• We can use any one of these
Constraints in the columns
ROWS
Ø A Table have any number of rows
defined as a tuple or a record.
Ø A database record is a row of
data in a database table
Ø Each Rows have unique Row id
Every
rows in the table has the same structure
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