I'm dealing with some legacy data in an Oracle table and have the following
--------------------------------------------
| RefNo | ID |
--------------------------------------------
| FOO/BAR/BAZ/AAAAAAAAAA | 1 |
| FOO/BAR/BAZ/BBBBBBBBBB | 1 |
| FOO/BAR/BAZ/CCCCCCCCCC | 1 |
| FOO/BAR/BAZ/DDDDDDDDDD | 1 |
--------------------------------------------
For each of the /FOO/BAR/BAZ/% records I want to make the ID a Unique incrementing number.
Is there a method to do this in SQL?
Thanks in advance
EDIT
Sorry for not being specific. I have several groups of records /FOO/BAR/BAZ/, /FOO/ZZZ/YYY/. The same transformation needs to occur for each of these other (example) groups. The recnum can't be used I want ID to start from 1, incrementing, for each group of records I have to change.
Sorry for making a mess of my first post. Output should be
--------------------------------------------
| RefNo | ID |
--------------------------------------------
| FOO/BAR/BAZ/AAAAAAAAAA | 1 |
| FOO/BAR/BAZ/BBBBBBBBBB | 2 |
| FOO/BAR/BAZ/CCCCCCCCCC | 3 |
| FOO/BAR/BAZ/DDDDDDDDDD | 4 |
| FOO/ZZZ/YYY/AAAAAAAAAA | 1 |
| FOO/ZZZ/YYY/BBBBBBBBBB | 2 |
--------------------------------------------
Let's try something like this(Oracle version 10g and higher):
SQL> with t1 as(
2 select 'FOO/BAR/BAZ/AAAAAAAAAA' as RefNo, 1 as ID from dual union all
3 select 'FOO/BAR/BAZ/BBBBBBBBBB', 1 from dual union all
4 select 'FOO/BAR/BAZ/CCCCCCCCCC', 1 from dual union all
5 select 'FOO/BAR/BAZ/DDDDDDDDDD', 1 from dual union all
6 select 'FOO/ZZZ/YYY/AAAAAAAAAA', 1 from dual union all
7 select 'FOO/ZZZ/YYY/BBBBBBBBBB', 1 from dual union all
8 select 'FOO/ZZZ/YYY/CCCCCCCCCC', 1 from dual union all
9 select 'FOO/ZZZ/YYY/DDDDDDDDDD', 1 from dual
10 )
11 select row_number() over(partition by ComPart order by DifPart) as id
12 , RefNo
13 From (select regexp_substr(RefNo, '[[:alpha:]]+$') as DifPart
14 , regexp_substr(RefNo, '([[:alpha:]]+/)+') as ComPart
15 , RefNo
16 , Id
17 from t1
18 ) q
19 ;
ID REFNO
---------- -----------------------
1 FOO/BAR/BAZ/AAAAAAAAAA
2 FOO/BAR/BAZ/BBBBBBBBBB
3 FOO/BAR/BAZ/CCCCCCCCCC
4 FOO/BAR/BAZ/DDDDDDDDDD
1 FOO/ZZZ/YYY/AAAAAAAAAA
2 FOO/ZZZ/YYY/BBBBBBBBBB
3 FOO/ZZZ/YYY/CCCCCCCCCC
4 FOO/ZZZ/YYY/DDDDDDDDDD
I think that actual updating the ID column wouldn't be a good idea. Every time you add new groups of data you would have to run the update statement again. The better way would be creating a view and you will see desired output every time you query it.
rownum can be used as an incrementing ID?
UPDATE legacy_table
SET id = ROWNUM;
This will assign unique values to all records in the table. This link contains documentation about Oracle Pseudocolumn.
You can run the following:
update <table_name> set id = rownum where descr like 'FOO/BAR/BAZ/%'
This is pretty rough and I'm not sure if your RefNo is a single value column or you just made it like that for simplicity.
select
sub.RefNo
row_number() over (order by sub.RefNo) + (select max(id) from TABLE),
from (
select FOO+'/'+BAR+'/'+BAZ+'/'+OTHER as RefNo
from TABLE
group by FOO+'/'+BAR+'/'+BAZ+'/'+OTHER
) sub
Related
I am trying to find difference in table depending on specific column.
I have a table which looks something like this:
+------------------------+
| rn | P_id | D_id |
+------------------------+
| 1 | 8 | 20 |
+----+--------------+----+
| 2 | 13 | 20 |
+----+--------------+----+
| 3 | 8 | 21 |
+----+--------------+----+
| 4 | 13 | 21 |
+----+--------------+----+
| 5 | 15 | 21 |
+----+--------------+----+
| 6 | 17 | 21 |
+------------------------+
So , I want to get the P_id of rows where D_id is equal to 21 and is unique (For unique I mean there shouldn't be a row with with same P_id where D_id is equal to 20)
For example , in the shown table , expected result will be - P_id 15 and 17.
Would like get this result using JOIN if possible.
EDIT : I am using MSSQL . I want to explain the situation just to clarify some confusion . Imagine D_id represents downloadID (21 - latest download , 20 - old one ) , so I want to simply compare data from old download to new one and see if any new data has been added.
In this case those new ones are records where P_id is 15 and 17
WITH CTE(RN,P_ID,D_ID) AS
(
SELECT 1 , 8 , 20 UNION ALL
SELECT 2 , 13 , 20 UNION ALL
SELECT 3 , 8 , 21 UNION ALL
SELECT 4 , 13 , 21 UNION ALL
SELECT 5 ,15 , 21 UNION ALL
SELECT 6 , 17, 21
)
SELECT C.P_ID
FROM CTE AS C
GROUP BY C.P_ID
HAVING MAX(C.D_ID)=MIN(C.D_ID) AND MAX(C.D_ID)=21
If you have to use a join, you should use a subquery in which you fetch the number of occurences of a P_id.
This query fetches the number of occurences:
SELECT `P_id`, COUNT(`rn`) AS `cnt`
FROM `table`
GROUP BY `P_id`;
That would mean that the entire query becomes something like this:
SELECT t.`P_id`
FROM `table` t
INNER JOIN ( SELECT `P_id`, COUNT(`rn`) AS `cnt`
FROM `table`
GROUP BY `P_id` ) c
ON c.`P_id` = t.`P_id`
WHERE t.`D_id` = 21 AND c.`cnt` = 1;
I have a table like below:
ID | Name | Ratio | Miles
____________________________________
1 | ABC | 45 | 21
1 | ABC | 46 | 24
1 | ABC | 46 | 25
2 | PQR | 41 | 19
2 | PQR | 39 | 17
3 | XYZ | 27 | 13
3 | XYZ | 26 | 11
4 | DEF | 40 | 18
4 | DEF | 40 | 18
4 | DEF | 42 | 20
I want to write a query that will find an ID whose Miles value has been steadily rising.
For instance,
Miles values of Name 'ABC' and 'DEF' are steadily rising.
It's fine if the Miles value drops by up to 5% and rises again.
It should also include this Name.
I tried self join on this table but it gives me Cartesian product.
Can anyone help me with this?
I am using SQL server 2012.
Thanks in advance!
SQL tables represent unordered sets. Let me assume that you have a column that specifies the ordering. Then, you can use lag() and some logic:
select id, name
from (select t.*,
lag(miles) over (partition by id order by orderingcol) as prev_miles
from t
) t
group by id, name
having min(case when prev_miles is null or miles >= prev_miles * 0.95 then 1 else 0 end) = 1;
The having clause is simply determining if all the rows meet your specific condition.
try this:
Note: 5% case is not handled here
create table #tmp(ID INT,Name VARCHAR(50),Ratio INT,Miles INT)
INSERT INTO #tmp
SELECT 1,'ABC',45,21
union all
SELECT 1,'ABC',46,24
union all
SELECT 1,'ABC',46,25
union all
SELECT 2,'PQR',41,19
union all
SELECT 2,'PQR',39,17
union all
SELECT 3,'XYZ',27,13
union all
SELECT 3,'XYZ',26,11
union all
SELECT 4,'DEF',40,18
union all
SELECT 4,'DEF',40,18
union all
SELECT 4,'DEF',42,21
Select *,CASE WHEN Miles<=LEAD(Miles,1,Miles) OVER(partition by ID Order by ID) THEN 1
--NEED ADD 5%condition Here
ELSE 0 END AS nextMiles
into #tmp2
from #tmp
;with cte
AS(
select * , ROW_NUMBER() OVER (partition by ID,nextMiles order by ID) rn from #tmp2
)
SELECT DISTINCT ID,Name FROM cte WHERE rn>1
Drop table #tmp
Drop table #tmp2
Hi，I have a column as below
+--------+--------+
| day | amount|
+--------+---------
| 2 | 2 |
| 1 | 3 |
| 1 | 4 |
| 2 | 2 |
| 3 | 3 |
| 4 | 3 |
+--------+--------+
now I want something like this sum day 1- day2 as row one , sum day1-3 as row 2, and so on.
+--------+--------+
| day | amount|
+--------+---------
| 1-2 | 11 |
| 1-3 | 14 |
| 1-4 | 17 |
+--------+--------+
Could you offer any one help ,thanks!
with data as(
select 2 day, 2 amount from dual union all
select 1 day, 3 amount from dual union all
select 1 day, 4 amount from dual union all
select 2 day, 2 amount from dual union all
select 3 day, 3 amount from dual union all
select 4 day, 3 amount from dual)
select distinct day, sum(amount) over (order by day range unbounded preceding) cume_amount
from data
order by 1;
DAY CUME_AMOUNT
---------- -----------
1 7
2 11
3 14
4 17
if you are using oracle you can do something like the above
Assuming the day range in left column always starts from "1-", What you need is a query doing cumulative sum on the grouped table(dayWiseSum below). Since it needs to be accessed twice I'd put it into a temporary table.
CREATE TEMPORARY TABLE dayWiseSum AS
(SELECT day,SUM(amount) AS amount FROM table1 GROUP BY day ORDER BY day);
SELECT CONCAT("1-",t1.day) as day, SUM(t2.amount) AS amount
FROM dayWiseSum t1 INNER JOIN dayWiseSum
t2 ON t1.day > t2.day
--change to >= if you want to include "1-1"
GROUP BY t1.day, t1.amount ORDER BY t1.day
DROP TABLE dayWiseSum;
Here's a fiddle to test with:
http://sqlfiddle.com/#!9/c1656/1/0
Note: Since sqlfiddle isn't allowing CREATE statements, I've replaced dayWiseSum with it's query there. Also, I've used "Text to DDL" option to paste the exact text of the table from your question to generate the create table query :)
I am trying to replicate a workplace scenario. The sqlfiddle for Oracle db is not working so I couldn't recreate the table.
Say I have a table like below
Table1
+----+------+
| ID | Col1 |
+----+------+
| 1 | A |
| 2 | B |
| 3 | C |
+----+------+
Now we run a query with where condition. The in clause for where is passed by user and run time and can change.
Suppose user inputs 1,2,4,5
So the SQL will be like
select t.* from Table1 t where t.id in (1,2,4,5);
The result of this query will be
+----+------+
| ID | Col1 |
+----+------+
| 1 | A |
| 2 | B |
+----+------+
Now output I am expecting should be something like below
+----+---------+------+
| ID | ErrCode | Col1 |
+----+---------+------+
| 1 | 0 | A |
| 2 | 0 | B |
| 4 | 404 | |
| 5 | 404 | |
+----+---------+------+
As 3 was not entered by user, we will not return it. But for 4 and 5, there is no record in our table, so I want to create another dummy column which will contain error code. The data columns should be null.
It is not mandatory that the user input should go to in clause. We can use it anywhere in the query.
I am thinking of some way of splitting the input id and use them as rows. Then use them to do left join with Table1 to find the records which exists and doesn't exist in Table1 and use case on that to decide among 0 or 404 as error code.
Appreciate any other way we can do it by query.
Here it goes
SQL> WITH table_filter AS
2 (SELECT regexp_substr(txt, '[^,]+', 1, LEVEL) id
3 FROM (SELECT '1,2,4,5' AS txt FROM dual) -- User input here
4 CONNECT BY regexp_substr(txt, '[^,]+', 1, LEVEL) IS NOT NULL),
5 table1 AS -- Sample data
6 (SELECT 1 id,
7 'A' col1
8 FROM dual
9 UNION ALL
10 SELECT 2,
11 'B'
12 FROM dual
13 UNION ALL
14 SELECT 3,
15 'C'
16 FROM dual)
17 SELECT f.id,
18 CASE
19 WHEN t.id IS NULL THEN
20 404
21 ELSE
22 0
23 END AS err_code,
24 t.col1
25 FROM table_filter f
26 LEFT OUTER JOIN table1 t
27 ON t.id = f.id;
ID ERR_CODE COL1
---------------------------- ---------- ----
1 0 A
2 0 B
5 404
4 404
SQL>
Oracle Setup:
CREATE TABLE Table1 ( id, col1 ) AS
SELECT 1, 'A' FROM DUAL UNION ALL
SELECT 2, 'B' FROM DUAL;
Query:
SELECT i.COLUMN_VALUE AS id,
NVL2( t.col1, 0, 404 ) AS ErrCode,
t.col1
FROM TABLE( SYS.ODCINUMBERLIST( 1, 2, 4, 5 ) ) i
LEFT OUTER JOIN
Table1 t
ON ( i.COLUMN_VALUE = t.id );
Output:
ID ERRCODE COL1
-- ------- ----
1 0 A
2 0 B
4 404
5 404
The collection of ids can be built dynamically using PL/SQL or an external language and then passed as a bind variable. See my answer here for an example.
I am attempting to select distinct (last updated) rows from a table in my database. I am trying to get the last updated row for each "Sub section". However I cannot find a way to achieve this.
The table looks like:
ID | Name |LastUpdated | Section | Sub |
1 | Name1 | 2013-04-07 16:38:18.837 | 1 | 1 |
2 | Name2 | 2013-04-07 15:38:18.837 | 1 | 2 |
3 | Name3 | 2013-04-07 12:38:18.837 | 1 | 1 |
4 | Name4 | 2013-04-07 13:38:18.837 | 1 | 3 |
5 | Name5 | 2013-04-07 17:38:18.837 | 1 | 3 |
What I am trying to get my SQL Statement to do is return rows:
1, 2, and 5.
They are distinct for the Sub, and the most recent.
I have tried:
SELECT DISTINCT Sub, LastUpdated, Name
FROM TABLE
WHERE LastUpdated = (SELECT MAX(LastUpdated) FROM TABLE WHERE Section = 1)
Which only returns the distinct row for the most recent updated Row. Which makes sense.
I have googled what I am trying, and checked relevant posts on here. However not managed to find one which really answers what I am trying.
You can use the row_number() window function to assign numbers for each partition of rows with the same value of Sub. Using order by LastUpdated desc, the row with row number one will be the latest row:
select *
from (
select row_number() over (
partition by Sub
order by LastUpdated desc) as rn
, *
from YourTable
) as SubQueryAlias
where rn = 1
Wouldn't it be enough to use group by?
SELECT DISTINCT MIN(Sub), MAX(LastUpdated), MIN(NAME) FROM TABLE GROUP BY Sub Where Section = 1