java - Updating two tables sql -


i have table tblpurchase , tblsale want update quantities of both tables salesperson purchases thing seller

create table tblpurchase(                          id int primary key,                          p_name varchar(50) ,                          p_qty int,                           date varchar(50),                         cust_name varchar(50)                          )

the second table 

    create table tblsale (                   id int primary key,                   p_name varchar(50),                   p_qty varchar(50), )

now how can update tblpurchase on sale in tblsale? here stored procedure tried use want implement in java how it?

create proc deduce              @p_id int @p_quantity varchar(50)                      update tblpurchase set p_qty = p_qty - @p_quantity             update tblsale set s_qty = s_qty + @p_quantity             @p_id = @p_id

i not going answer entirely, can give hint. create triggers gets triggered when there sale in tblsale table. problem see in tblsale, why p_qty varchar? should int.


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