Question

I need to know how to write a SQL statement for the following senario;

I have a table, which consist of 2 columns. ParentName and No_Of_Kids. so say we have a record called parent A and parent A had 2 kids.(in 2008)

Now in 2011 Parent A has got another 3 kids, so i need to update this table, to say Parent A has 5 kids altogether.

UPDATE ParentKidsTable
SET parentName=value, No_Of_kids=??? // (how to write the SQL no. of Kids in 2008 + no. of kids in 2011)
WHERE parentName=some_value

Answer 1

I’m assuming that you’re looking for the generic case of adding N kids, so you don’t have to look up the value No_Of_Kids first in which case you can do:

UPDATE ParentKidsTable
SET No_Of_Kids = No_Of_Kids + 3
WHERE ParentName = 'some_value'