Assign the same value from first of the block (or specific row)

[Teslator]

I'm trying to create a new variable called "batch" and then assign the value to it when TR_RT contains "B A T C H" then batch=Account.

The following rows after "B A T C H" will also have the same value as "B A T C H" until the next "B A T C H" is found. Then batch=Account of the new "B A T C H".

I use Base SAS 9.4.

Any help would be greatly appreciated.

Thanks,

Jeff

Have:

Obs	SeqNum	TR_RT	Account
1	5900583193	B A T C H	7020
2	5900583194	5010 0005	9860608265
3	5900583195	0531 0030	9860608265
4	5900583196	0110 0002
5	5900583197	0631 0027
6	5900583198	0531 0030
7	5900583199	0531 0030
8	5900583200	0531 0030
9	5900583201	B A T C H	1234
10	5900583202	0531 0030
11	5900583203	0531 0030
12	5900583204	0531 0030
13	5900583205	0531 0030
14	5900583206	0631 0027	9860608265
15	5900583207	B A T C H	4587
16	5900583208	0531 0030
17	5900583209	0631 0027
18	5900583210	0531 0030
19	5900583211	0531 0030
20	5900583212	0531 0030
21	5900583213	0531 0030
22	5900583214	0531 0030

Want:

Obs	SeqNum	TR_RT	Account	Batch
1	5900583193	B A T C H	7020	7020
2	5900583194	5010 0005	9860608265	7020
3	5900583195	0531 0030	9860608265	7020
4	5900583196	0110 0002		7020
5	5900583197	0631 0027		7020
6	5900583198	0531 0030		7020
7	5900583199	0531 0030		7020
8	5900583200	0531 0030		7020
9	5900583201	B A T C H	1234	1234
10	5900583202	0531 0030		1234
11	5900583203	0531 0030		1234
12	5900583204	0531 0030		1234
13	5900583205	0531 0030		1234
14	5900583206	0631 0027	9860608265	1234
15	5900583207	B A T C H	4587	4587
16	5900583208	0531 0030		4587
17	5900583209	0631 0027		4587
18	5900583210	0531 0030		4587
19	5900583211	0531 0030		4587
20	5900583212	0531 0030		4587
21	5900583213	0531 0030		4587
22	5900583214	0531 0030		4587

[LinusH]

Take a look at RETAIN statement.

[novinosrin · Accepted solution]

data want;

set have;

retain Batch;

if TR_RT ="B A T C H" then Batch=account;

run;

[Teslator]

Thanks so much Novinosrin. 

[dancy0824]

Result:

[Teslator]

Thanks everyone for the help.