Insert data based on condition

Question

I have 2 tables i need to insert data if total of 2 columns becomes 0.One value is negative and another values is positive.
desc Crdetail
acc_no---number(6),
cr_Dt---date,
cr_amt---Number(15,3)
desc dbDetail
acc_no----number(6),
db_dt--date,
db_amt--number(15,3)
CrData
acc_no----cr_Dt-------cr_amt
101------10-aug-09----10
102------20-aug-09----15
103---21-aug-09---- -20 Note its -20
DbData
101----11-aug-09---- -10 --- Note Its -10
102------20-aug-09----15
When i inserting to other table
the sum of db_amt and cr_amt should be zero then only it should insert.
rgds
ramya

Answer 1

user11243021 wrote:
Hi Instead of adding new column tot_amt can we use case statment or write a function to check and insert.just declare a variable called tot_amt and it should solve your problem. You can use if or case statement as well but I will not advise you to use a function because it becomes too costly in this case (making call then returning value).
Rgds.