Question

E. Answer the following:
What is a Table?
2.
What do you mean by Data types?
3. What is the use of Primary key?
4.
How will you inserta new field in an existing table?​

Answer 1

Answer:

3: A primary key is used as a unique identifier quickly parse data with in the table .A table cannot have more than one primary key.

Answer 2

Explanation:

Factorise the following expressions.

( a + 8a + 16 () p2 - 10 p +25 tify 25m² + 30m + 9

(iv) 49y2 + 84yz + 3622

(v) 4x2 - 8x + 4

21

(vi) 121b2-88bc + 16c2

tail

(vii) (1 + m)2 - 4lm (Hint: Expand (1+m) first)

Barev

(viii) a + 2a-b2 + b

17

Factorise