Compare two tables with different length

Hey MatLab users,

i need help to compare different columns from two tables (T1 and T2) with different length for various conditions (date, time, timestep, A, B, C) to cause a result (T2.res).

T2.res should be = 1 for every timestep in T2.timestep if date and time are equal and if the value T1.A (row-1) is not equal or greater than T1.A (row) when T1.B (row) = 1.

T1.date = [20190101; 20190101; 20190101; 20190101; 20190101; 20190101; 20190102; 20190102; 20190102; 20190102; 20190102; 20190102; 20190102; 20190102]
T1.time = [0; 0; 0;     12; 12; 12;   0; 0; 0; 0;      6; 6; 6; 6]                % sorted time (0,1,2...)
T1.A =    [20; 30; 35;  10; 30; 45;   28; 42; 60; 65;  20; 45; 50; 60]            % cumulative value per T1.time
T1.B =    [1; 0; 0;     0; 1; 0;      0; 0; 1; 0;      1; 0; 0; 0]                % max. one value "1" in T1.B per T1.time value

T2.date = [20190101; 20190101; 20190101; 20190101; 20190101; 20190101; 20190101; 20190102; 20190102; 20190102; 20190102; 20190102; 20190102; 20190102]
T2.time =     [0; 0; 0;    12; 12; 12; 12;   0; 0; 0;     6; 6; 6; 6]             % sorted time (0,1,2...)
T2.timestep = [1; 2; 3;    1; 2; 3; 4;       1; 2; 3;     1; 2; 3; 4]             % sorted timesteps (1,2,3,4...)
T2.C =        [15; 5; 25;  10; 20; 40; 5;    13; 39; 55;  8; 1; 24; 20]           % different positive values

% Conditions might be like:

% % if T1.date == T2.date && T1.time == T2.time && T1.B == 1 &&  % "first row in T1" && T1.B
%    T2.res = 1;   

Result should be:

T2.res =  [1;     % date: ok, time: ok, T1.B == 1 is the first value in T1.time == 0: ok
           1;     % date: ok, time: ok, T1.B == 1 is the first value in T1.time == 0: ok
           1;     % date: ok, time: ok, T1.B == 1 is the first value in T1.time == 0: ok
           
           0;     % date: ok, time: ok, T1.B == 1 (row) and T1.A == 30 (row) but T1.A (row-1) == 10 >= T2.C == 10: false
           1;     % date: ok, time: ok, T1.B == 1 (row) and T1.A == 30 (row) and T1.A (row-1) == 10 < T2.C == 20: ok
           1;     % date: ok, time: ok, T1.B == 1 (row) and T1.A == 30 (row) and T1.A (row-1) == 10 < T2.C == 40: ok
           0;     % date: ok, time: ok, T1.B == 1 (row) and T1.A == 30 (row) but T1.A (row-1) == 10 >= T2.C == 5: false
           
           0;     % date: ok, time: ok, T1.B == 1 (row) and T1.A == 60 (row) but T1.A (row-1) == 42 >= T2.C == 13: false
           0;     % date: ok, time: ok, T1.B == 1 (row) and T1.A == 60 (row) but T1.A (row-1) == 42 >= T2.C == 39: false
           1;     % date: ok, time: ok, T1.B == 1 (row) and T1.A == 60 (row) and T1.A (row-1) == 42 < T2.C == 55: ok
           
           1;     % date: ok, time: ok, T1.B == 1 is the first value in T1.time == 12: ok
           1;     % date: ok, time: ok, T1.B == 1 is the first value in T1.time == 12: ok
           1;     % date: ok, time: ok, T1.B == 1 is the first value in T1.time == 12: ok
           1]     % date: ok, time: ok, T1.B == 1 is the first value in T1.time == 12: ok

Thanks!!