TSQL84 Iplement a trigger on the employee table that prevent

T-SQL-8-4

Iplement a trigger on the employee table that prevents the employee start date from being after the current date.

DATABASE (key fields are underlined)

EMPLOYEE TABLE: EMP_ID, EMP_LNAME, EMP_STREET, EMP_CITY, EMP_STATE, EMP_ZIP, EMP_START_DATE

TABLES TABLE: TABLE_ID, AREA_ID, TABLE_SEATS

AREA TABLE: AREA_ID, AREA_NAME, AREA_SUPERVISOR_EMPLOYEE_ID

CUSTOMER TABLE: CUST_ID, CUST_LAST_NAME, CUST_NUMBER_OF_GUESTS

ASSIGNMENT TABLE: EMP_ID, TABLE_ID

SEATING TABLE: CUST_ID, TABLE_ID, SEATING_COST, SEATING_DATE, SEATING_TIP

Solution

create trigger checkDate

on EMPLOYEE

after update,insert

as

if exists(

select * from employee where emp_start_date >= currdate()

)

begin

RAISERROR( \'start date should be greater than current date.\');

ROLLBACK TRANSACTION;

RETURN

end;