Question

Bank accountant needs to change the last name of one of his customers in table customer' which command should be used for this
Sheela needs to remove all the rows from the sale history table to realise the storage space but she does not want to remove the table structure offf which statement should she used.
when a primary key constraint is included in a table what are the construct does it implies?

Answer 1

hi mate ur answer....

1)update command...

1)update command... 2)delete command...

1)update command... 2)delete command...3)when a primary key constraint is included the null value cannot be written in primary key, as primary key does not allow null values.

hope it help u mark me as brainlist.....

Answer 2

Answer:

hi mates this is ur answer

Explanation:

update command

delete command

null value is not allowed

hope this helps u