How to fill the gaps with data?
HelloI have data points with a header that contains the ID that I have to report to each row of data.
I want the ID of the Patient to fill the fields below the rank (where the "Obs" and sequential numbers are) until it reaches the next patient id and then do the same thing again and again until the end.
Is this possible in a single SQL UPDATE statement?
Thank you, Daniel
It's data, it's a column:
Patient ID = system 1000207 = LVS + ZDV + ddI randomization Date = 26/03/2004
OBS
1
2
3
4
5
6
7
Patient ID = regime 1000751 = LVS + d4T + 3TC randomization Date = 25/02/2004
OBS
8
9
10
11
12
13
14
Patient ID = system 1001379 = LVP + d4T + 3TC randomization Date = 17/03/2004
OBS
15
16
17
18
19
20
21
22
23
24
etc etc.
Do you have any column order?
If not, how you will order the data?
If you have a column for the classification, the described selection will give you the id of the patient in all lines
select col1,
last_value(
regexp_substr(col1,'Patient ID=([0-9]+)',1,1,null,1) ignore nulls
)
over(order by ord_col) s
from your_table;
You can then use the MERGER based on the ROWID of update...
Published by: JAC on May 21, 2013 20:18
Tags: Database
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to fill the gaps with value of lead and the delay and make average and the gap between earned
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What I need is to fill the gaps with value of lead and the delay and make average and the gap between the valuesID TYPE NUM NAME BEG_MP END_MP VALUE 10001103N 3 1190001 WST 0.000 0.220 10001103N 3 1190002 WST 0.220 0.440 10001103N 3 1190003 WST 0.440 0.820 12800 10001103N 3 1190003 WST 0.820 1.180 12800 10001103N 3 1190004 WST 1.180 1.220 10001103N 3 1190004 WST 1.220 1.300 10001103N 3 1190005 WST 1.300 1.420 14800 10001103N 3 1190005 WST 1.420 1.550 14800 10001103N 3 1190006 WST 1.550 2.030 10001103N 3 1190006 WST 2.030 2.660 10001103N 3 1190007 WST 2.660 2.780
ID TYPE NUM NAME BEG_MP END_MP VALUE 10001103N 3 1190001 WST 0.000 0.220 12800 ---> Lag value 10001103N 3 1190002 WST 0.220 0.440 12800 ---> Lag Value 10001103N 3 1190003 WST 0.440 0.820 12800 10001103N 3 1190003 WST 0.820 1.180 12800 10001103N 3 1190004 WST 1.180 1.220 13800 ---> Avg(12800,14800) 10001103N 3 1190004 WST 1.220 1.300 13800 ---> Avg(12800,14800) 10001103N 3 1190005 WST 1.300 1.420 14800 10001103N 3 1190005 WST 1.420 1.550 14800 10001103N 3 1190006 WST 1.550 2.030 14800 ---> Lead Value 10001103N 3 1190006 WST 2.030 2.660 14800 ---> Lead Value 10001103N 3 1190007 WST 2.660 2.780 14800 ---> Lead Value
create table AVG_TABLE ( ID VARCHAR2(20), TYPE NUMBER, NUM NUMBER, NAME VARCHAR2(10), VALUE NUMBER, BEG_MP NUMBER(6,3), END_MP NUMBER(6,3) ) ; insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190001, 'WST', null, 0, .22); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190002, 'WST', null, .22, .44); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190003, 'WST', 12800, .44, .82); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190003, 'WST', 12800, .82, 1.18); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190004, 'WST', null, 1.18, 1.22); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190004, 'WST', null, 1.22, 1.3); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190005, 'WST', 14800, 1.3, 1.42); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190005, 'WST', 14800, 1.42, 1.55); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190006, 'WST', null, 1.55, 2.03); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190006, 'WST', null, 2.03, 2.66); insert into AVG_TABLE (ID, TYPE, NUM, NAME, VALUE, BEG_MP, END_MP) values ('10001103N', 3, 1190007, 'WST', null, 2.66, 2.78); commit;
Hello
Use LEAD and LAG when you know exactly how far is the target line (for example, if you know the desired value is on the next row).
If you don't know exactly how far is the target line, then FIRST_VALUE and LAST_VALUE are more likely to be useful.WITH got_neighbors AS ( SELECT avg_table.* , LAST_VALUE (value IGNORE NULLS) OVER (ORDER BY beg_mp) AS prev_value , LAST_VALUE (value IGNORE NULLS) OVER (ORDER BY beg_mp DESC) AS next_value FROM avg_table ) SELECT id, type, num, name, beg_mp, end_mp , COALESCE ( value , ( NVL (prev_value, next_value) + NVL (next_value, prev_value) ) / 2 ) AS value FROM got_neighbors ORDER BY beg_mp to f ;
Riedelme is correct: LAG LEAD (as well as FIRST_VALUE and LAST_VALUE) can return only the values that are there (or that you give as default values). This means that you can not solve this problem with these functions alone; you need something else (as NVL, above) to provide value when the function does not find it.
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