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Oracle if updating field

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Our statement would look like this: You can see that the SET clause includes a subquery, which finds the MAX value of the price column in the product table and multiplies it by 1.2 to add 20%.

Finally, the WHERE clause is outside the subquery to only update the product_id of 1, as it applies to UPDATE rather than to the subquery.

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to allow inserting and updating exactly the desired data.

Often this problem is solved with a select statement and then an IF statement, eg: declare v_exists varchar2(1) := ' F'; begin begin select ' T' into v_exists from employee where employee_id := i_employee_id; exception when no_data_found then null; end; if v_exists = ' T' then update employee set ... When coding a procedure, you should try and get an idea of how the procedure will be used.where employee_id = i_employee_id else insert ( ... In this case, the question to ask whether the procedure will mostly be used to update existing employee records, or insert new ones.Maybe there will be no clear winner, but there often is.The subquery will perform a COUNT function using a CASE statement to determine if the returned value is Y or N depending on the value of COUNT.It is calculated for each product_id and matches the outer query.We can continue working with our example from the previous steps.