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Help with a trigger to change field to a negative value
Posted by: mark paterson
Date: May 11, 2021 08:29AM

I have a database called check_register that has one table called transactions. The transactions table has the following columns:

transID int (auto increment) primary key
amount int
withdraw varchar [values are either yes or no]

is there a way to write a trigger that will look to see if the withdraw field = yes then change the amount value to a negative value?

for example, a record entered with the following values:

transID: 1
amount: 20.00
withdraw: yes

the trigger would replace 20.00 with -20.00

Thank you in advance. I'm trying to teach myself ways to have the database help with data manipulation,

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Help with a trigger to change field to a negative value
May 11, 2021 08:29AM

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