Hi... I'm sorry if i posted again this issue.. I just really want a help to resolved my problem... I just want to know what logic..what syntax should i need to used to satisfied the conditions that I needed so that the rendered will have a correct output. Because in rendered will depend the salary of an employee Honestly, I always think what syntax should i need but still I really don't know how to do it.. I hope somebody will understand my situation and help me to solve it. Thank you so much... EMP_NO-------DATE_DTR-------LOGIN------------------------LOGOUT---------------RENDERED------- ---This shift is 21:35:00 - 05:35:00 00300395-----2011-12-01-----2011-12-01 21:30:00----------2011-12-02 05:45:00--08:00:00 //rendered should be 08:00:00 because his login <= 21:35:00 and his logout is >= 05:35:00 But i have a lot of shift: 21:35:00 - 05:35:00 05:35:00 - 13:35:00 13:35:00 - 21:35:00 07:00:00 - 16:00:00 08:00:00 - 16:00:00 08:00:00 - 17:00:00 08:00:00 - 18:00:00 when I used this code: Code: UPDATE payroll.reg_att SET Rendered = case when time_to_sec(time(TotalHours)) <= time_to_sec('02:00:00') then sec_to_time(time_to_sec('00:00:00')) when time_to_sec(time(LOGIN)) <= time_to_sec('05:35:00') AND time_to_sec(time(LOGOUT)) >= time_to_sec('13:35:00') then sec_to_time(time_to_sec('08:00:00')) when time_to_sec(time(LOGIN)) <= time_to_sec('07:00:00') AND time_to_sec(time(LOGOUT)) >= time_to_sec('16:00:00') then sec_to_time(time_to_sec('08:00:00')) when time_to_sec(time(LOGIN)) <= time_to_sec('08:00:00') AND time_to_sec(time(LOGOUT)) >= time_to_sec('16:00:00') then sec_to_time(time_to_sec('08:00:00')) when time_to_sec(time(LOGIN)) <= time_to_sec('13:35:00') AND time_to_sec(time(LOGOUT)) >= time_to_sec('21:35:00') then sec_to_time(time_to_sec('08:00:00')) when time_to_sec(time(LOGOUT)) < time_to_sec('05:35:00') AND time_to_sec(time(LOGIN)) >= time_to_sec('21:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '05:35:00')))) when time_to_sec(time(LOGOUT)) <= time_to_sec('05:35:00') AND time_to_sec(time(LOGIN)) <= time_to_sec('21:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '05:35:00'))) + time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '21:35:00'))) - time_to_sec('08:00:00')) when time_to_sec(time(LOGOUT)) >= time_to_sec('05:35:00') AND time_to_sec(time(LOGIN)) >= time_to_sec('21:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '05:35:00'))) + time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '21:35:00'))) - time_to_sec('08:00:00')) when time_to_sec(time(LOGOUT)) < time_to_sec('13:35:00') AND time_to_sec(time(LOGIN)) >= time_to_sec('05:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '13:35:00'))) + time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '05:35:00'))) - time_to_sec('08:00:00')) when time_to_sec(time(LOGIN)) > time_to_sec('13:35:00') AND time_to_sec(time(LOGOUT)) >= time_to_sec('21:35:00') then sec_to_time(time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '13:35:00')))) when time_to_sec(time(LOGOUT)) <= time_to_sec('21:35:00') AND time_to_sec(time(LOGIN)) <= time_to_sec('13:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '21:35:00'))) + time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '13:35:00'))) - time_to_sec('08:00:00')) when time_to_sec(time(LOGOUT)) < time_to_sec('21:35:00') AND time_to_sec(time(LOGIN)) >= time_to_sec('13:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '21:35:00'))) + time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '13:35:00'))) - time_to_sec('08:00:00')) when time_to_sec(time(LOGIN)) > time_to_sec('05:35:00') AND time_to_sec(time(LOGOUT)) >= time_to_sec('13:35:00') then sec_to_time(time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '05:35:00')))) when time_to_sec(time(LOGOUT)) < time_to_sec('21:35:00') AND time_to_sec(time(LOGIN)) >= time_to_sec('13:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '21:35:00')))) when time_to_sec(time(LOGOUT)) < time_to_sec('13:35:00') AND time_to_sec(time(LOGIN)) >= time_to_sec('05:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '13:35:00')))) when time_to_sec(time(LOGOUT)) <= time_to_sec('13:35:00') AND time_to_sec(time(LOGIN)) <= time_to_sec('05:35:00') then sec_to_time(time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '08:00:00')) + (time_to_sec(LOGOUT) - time_to_sec(concat(substr(LOGOUT, 1,10), ' ' , '13:35:00'))) + time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '08:00:00')) - (time_to_sec(LOGIN) - time_to_sec(concat(substr(LOGIN, 1,10), ' ' , '05:35:00'))) - time_to_sec('08:00:00')) END; I got a problem to get the rendered for 21:35:00 - 05:35:00 shift if the login <= 21:35:00 logout >= 05:35:00 Code: when time_to_sec(time(LOGIN)) <= time_to_sec('21:35:00') AND time_to_sec(time(LOGOUT)) >= time_to_sec('05:35:00') then sec_to_time(time_to_sec('08:00:00')) when I used it all shifts will affected..Because I think it only check in time. I have a lot of conditions needed per shift. Like this: //if the employee is early login from his shift and late logout from his shift the rendered will be 08:00:00 //if the employee is late to login the 08:00:00 will minus //if the employee is undertime or early to logout 08:00:00 will minus //if the employee is late to login and early to logout the the sum of late login and early logout will minus in 08:00:00 IF LOGIN <= 'SHIFT IN' AND LOGOUT >= 'SHIFT OUT' THEN RENDERED WILL 08:00:00 IF LOGIN <= 'SHIFT IN' AND LOGOUT < 'SHIFT OUT' THEN RENDERED WILL 08:00:00 - (LOGOUT - SHIFT OUT) IF LOGIN > 'SHIFT IN' AND LOGOUT >= 'SHIFT OUT' THEN RENDERED WILL 08:00:00 - (LOGIN - SHIFT IN) IF LOGIN >= 'SHIFT IN' AND LOGOUT <= 'SHIFT OUT'THEN RENDERED WILL 08:00:00 + (LOGOUT - SHIFT) 08:00:00 - (LOGIN - SHIFT) Thank you so much...