I have a varchar column that contains data like '0 03-03-14', '1 04-03-14' and so on.
I need to select the maximum one, in that case '1 04-03-14'.
My problem is that I can have the '1' (the max value) but how do I have to do if I also want the date ?
For now, I have this :
SELECT MAX(TO_NUMBER(SUBSTR(revision, 1, INSTR(revision, ' ')-1)))
FROM table
WHERE name = 'aname'
AND t_name = 'tname'
GROUP BY revision
Does anyone have an idea ?
Thanks
I assume you want something like max(version, date version), try this:
Select * from (
Select * from (
SELECT
TO_NUMBER(SUBSTR(revision, 1, INSTR(revision, ' ')-1)) as rev
, TO_DATE(SUBSTR(revision, 1, INSTR(revision, ' ')+1),'DD-MM-YY') as revDate
FROM table
WHERE name = 'aname'
AND t_name = 'tname'
) extracted
order by extracted.revDate, extracted.rev desc
) where rownum = 1
Do you mean this?
select max(revision)
from table
where name = 'aname' and t_name = 'tname';
It seems strange to put the revision number and date in one column. Is that really your data format? If not, modify your question with the actual data format.
Regarding your answers, I think the best solution would be to split those two parts :)
Related
I have column with data such as '123456789012'
I want to divide each of each 3 chars from the data with a '/' in between so that the output will be like: "123/456/789/012"
I tried "SELECT TO_CHAR(DATA, '999/999/999/999') FROM TABLE 1" but it does not print out the output as what I wanted. Previously I did "SELECT TO_CHAR(DATA, '$999,999,999,999.99') FROM TABLE 1 and it printed out as "$123,456,789,012.00" so I thought I could do the same for other case as well, but I guess that's not the case.
There is also a case where I also want to put '#' in front of the data so the output will be something like this: #12345678901234. Can I use TO_CHAR for this problem too?
Is these possible? Because when I go through the documentation of oracle about TO_CHAR, it stated a few format that can be use for TO_CHAR function and the format that I want is not listed there.
Thank you in advance. :D
Here is one option with varchar2 datatype:
with test as (
select '123456789012' a from dual
)
select listagg(substr(a,(level-1)*3+1,3),'/') within group (order by rownum) num
from test
connect by level <=length(a)
or
with test as (
select '123456789012.23' a from dual
)
select '$'||listagg(substr((regexp_substr(a,'[0-9]{1,}')),(level-1)*3+1,3),',') within group (order by rownum)||regexp_substr(a,'[.][0-9]{1,}') num
from test
connect by level <=length(a)
output:
1st query
123/456/789/012
2nd query
$123,456,789,012.23
If you wants groups of three then you can use the group separator G, and specify the character to use:
SELECT TO_CHAR(DATA, 'FM999G999G999G999', 'NLS_NUMERIC_CHARACTERS=./') FROM TABLE_1
123/456/789/012
If you want a leading # then you can use the currency indicator L, and again specify the character to use:
SELECT TO_CHAR(DATA, 'FML999999999999', 'NLS_CURRENCY=#') FROM TABLE_1
#123456789012
Or combine both:
SELECT TO_CHAR(DATA, 'FML999G999G999G999', 'NLS_CURRENCY=# NLS_NUMERIC_CHARACTERS=./') FROM TABLE_1
#123/456/789/012
db<>fiddle
The data type is always a string; only the format changes.
I have the following data in a table:
GROUP1|FIELD
Z_12TXT|111
Z_2TXT|222
Z_31TBT|333
Z_4TXT|444
Z_52TNT|555
Z_6TNT|666
And I engineer in a field that removes the leading numbers after the '_'
GROUP1|GROUP_ALIAS|FIELD
Z_12TXT|Z_TXT|111
Z_2TXT|Z_TXT|222
Z_31TBT|Z_TBT|333 <- to be removed
Z_4TXT|Z_TXT|444
Z_52TNT|Z_TNT|555
Z_6TNT|Z_TNT|666
How can I easily query the original table for only GROUP's that correspond to GROUP_ALIASES with only one Distinct FIELD in it?
Desired result:
GROUP1|GROUP_ALIAS|FIELD
Z_12TXT|Z_TXT|111
Z_2TXT|Z_TXT|222
Z_4TXT|Z_TXT|444
Z_52TNT|Z_TNT|555
Z_6TNT|Z_TNT|666
This is how I get all the GROUP_ALIAS's I don't want:
SELECT GROUP_ALIAS
FROM
(SELECT
GROUP1,FIELD,
case when instr(GROUP1, '_') = 2
then
substr(GROUP1, 1, 2) ||
ltrim(substr(GROUP1, 3), '0123456789')
else
substr(GROUP1 , 1, 1) ||
ltrim(substr(GROUP1, 2), '0123456789')
end GROUP_ALIAS
FROM MY_TABLE
GROUP BY GROUP_ALIAS
HAVING COUNT(FIELD)=1
Probably I could make the engineered field a second time simply on the original table and check that it isn't in the result from the latter, but want to avoid so much nesting. I don't know how to partition or do anything more sophisticated on my case statement making this engineered field, though.
UPDATE
Thanks for all the great replies below. Something about the SQL used must differ from what I thought because I'm getting info like:
GROUP1|GROUP_ALIAS|FIELD
111,222|,111|111
111,222|,222|222
etc.
Not sure why since the solutions work on my unabstracted data in db-fiddle. If anyone can spot what db it's actually using that would help but I'll also check on my end.
Here is one way, using analytic count. If you are not familiar with the with clause, read up on it - it's a very neat way to make your code readable. The way I declare column names in the with clause works since Oracle 11.2; if your version is older than that, the code needs to be re-written just slightly.
I also computed the "engineered field" in a more compact way. Use whatever you need to.
I used sample_data for the table name; adapt as needed.
with
add_alias (group1, group_alias, field) as (
select group1,
substr(group1, 1, instr(group1, '_')) ||
ltrim(substr(group1, instr(group1, '_') + 1), '0123456789'),
field
from sample_data
)
, add_counts (group1, group_alias, field, ct) as (
select group1, group_alias, field, count(*) over (partition by group_alias)
from add_alias
)
select group1, group_alias, field
from add_counts
where ct > 1
;
With Oracle you can use REGEXP_REPLACE and analytic functions:
select Group1, group_alias, field
from (select group1, REGEXP_REPLACE(group1,'_\d+','_') group_alias, field,
count(*) over (PARTITION BY REGEXP_REPLACE(group1,'_\d+','_')) as count from test) a
where count > 1
db-fiddle
SELECT cast ( SUBSTRING ( CAST ("ProcessingDate" AS text), 5, 2 ) as integer),
COUNT(*) INTO resultValue1,resultValue2
FROM "DemoLogs"."Project"
WHERE "Addr" = 'Y' AND "ProcessingDate" >= 20160110
GROUP BY 1
ORDER BY 1;
In my database, the ProcessingDate is stored as YYYYMMDD. So, I am extracting its month from it.
This query is working fine if we remove the INTO clause but, I want to store the result to use it further.
So what should be the datatype of the variable resultValue1 and resultValue2 how to store the data(because data will be multiple).
As I am new to PostgreSQL I don't know how to do this can anybody help me out.
Here resultValue1 & resultValue2 will be tables not variables. you can group by using the column names.
Give some column alias names for both columns and group by using them.
You probably want this.
SELECT cast ( SUBSTRING ( cast ("ProcessingDate" as text),5 , 2 ) as
integer) AS resultValue1, COUNT(*) AS resultValue2
INTO <NewTable> --NewTable will be created with those two columns
FROM "DemoLogs"."Project"
-- conditions
Group By 1
-- other contitions/clauses
;
Kindly refer this INTO Documentation.
Hope this helps.
Try this:
SELECT cast ( SUBSTRING ( cast ("ProcessingDate" as text),5 , 2 ) as integer)resultValue1,
COUNT(*)resultValue2
INTO <Table Name>
FROM "DemoLogs"."Project"
WHERE "Addr" = 'Y'
AND "ProcessingDate" >= '20160110'
Group By 1
Order By 1;
Store the above query in the variable and remove that INTO clause from it.
So, query will be now :
query = SELECT cast ( SUBSTRING ( CAST ("ProcessingDate" AS text), 5, 2 ) as
integer),
COUNT(*)
FROM "DemoLogs"."Project"
WHERE "Addr" = 'Y' AND "ProcessingDate" >= 20160110
GROUP BY 1
ORDER BY 1;
Now declare result_data of type record and use in the following manner:
We are looping over result_data because it gives number of rows as output
and I have declared resultset of type text to store the result (as I needed further)
FOR result_data IN EXECUTE query
LOOP
RAISE NOTICE 'result : %',to_json(result_data);
resultset = resultset || to_json(result_data);
END LOOP;
select rptName
from RptTable
where rpt_id in (
select LEFT(Reports, NULLIF(LEN(Reports)-1,-1))
from repoAccess1
where uid = 'VIKRAM'
)
this is my sql query In which i have use the sub query to access selected field
in this sub query returns
select LEFT(Reports, NULLIF(LEN(Reports)-1,-1))
from repoAccess1
where uid = 'VIKRAM'
Returns
1,2
that means the query should be like
select rptName
from RptTable where rpt_id in (1,2)
But i m getting this error
Msg 8114, Level 16, State 5, Line 1
Error converting data type nvarchar to numeric.
could anyone tell me ow to modify to get exact ans
It's a little hard to tell without the concrete table definitions, but I'm pretty sure you're trying to compare different data types to each other. If this is the case you can make use of the CAST or the CONVERT function, for example:
SELECT
[rptName]
FROM [RptTable]
WHERE [rpt_id] IN
(
SELECT
CONVERT(int, LEFT([Reports], NULLIF(LEN([Reports]) - 1, -1)))
FROM [repoAccess1]
WHERE [uid] = 'VIKRAM'
)
UPDATE: Since you have updated your question: The LEFT function returns results of either varchar or nvarchar data type. So the resulting query would be
SELECT
[rptName]
FROM [RptTable]
WHERE [rpt_id] IN('1', '2')
Please note the apostrophes (is this the correct term?) around the values. Since [rpt_id] seems to be of data type int the values cannot implicitly be converted. And that's where the aforementioned CAST or CONVERT come into play.
If I understand correctly, the subquery is returning a single row with a value of '1,2'. This is not a number, hence the error.
Before continuing, let me emphasize that storing values in comma delimited string is not the SQL-way of doing things. You should have one row per id, with proper types and foreign keys defined.
That said, sometimes we are stuck with other people's really bad design decisions. If this is the case, you can use LIKE:
select rptName
from RptTable r
where exists (select 1
from repoAccess1 a
where a.uid = 'VIKRAM' and
',' + a.reports + ',' like '%,' + cast(r.rpt_id as varchar(255)) + ',%'
);
select rptName
from RptTable
where rpt_id in (
select CAST(LEFT(Reports, NULLIF(LEN(Reports)-1,-1)) AS INT) as Val
from repoAccess1
where uid = 'VIKRAM'
)
Your query would work fine when (LEFT(Reports, NULLIF(LEN(Reports)-1,-1)) ) returns either 1 or 2 since SQL Server implicitly converts the varchar value to numeric.
It seems there might be a data issue. One of the data returned by LEFT function is non-numeric. In order to find that particular record you can use isnumeric function. Try like this,
SELECT rptName
FROM RptTable
WHERE rpt_id IN (
SELECT LEFT(Reports, NULLIF(LEN(Reports) - 1, - 1))
FROM repoAccess1
WHERE uid = 'VIKRAM'
AND ISNUMERIC(LEFT(Reports, NULLIF(LEN(Reports) - 1, - 1))) = 1
)
I have been asked to sort a locations table in ascending order. The data in the table currently looks something like this:
100F01
105B02
10B01
GK1-A01
201E12
20A01
However, when this data is displayed on the screen I want it to sort the numeric results in ascending order and then the string results in alphabetic order. The output should look something like this:
10B01
20A01
100F01
105B02
201E12
GK1-A01
I have tried using the following code
SELECT location FROM freelocations
ORDER BY CAST(SUBSTRING(location, 1, 2) AS INT)
however, as expected, this returns an error message because some locations don't start with a numeric:
Conversion failed when converting the varchar value 'GK' to data type int.
Any ideas or tips will be greatly appreciated
Maybe something like this?
select location
from freelocations
order by
case
when patindex('%[^0-9]%', location) = 1 then 9999999999
else cast(substring(location, 1, patindex('%[^0-9]%', location) - 1) as int)
end,
location
(It's a bit clumsy due to SQL Server lacking a regex replace function)
order by FIELD(string+0,1),string+0
but note that '10e20' will be misinterpreted!
Before casting you should check if the first 2 or 3 characters really are digits:
SELECT
location
FROM
freelocations
ORDER BY
CASE
WHEN location like '[0-9][0-9][0-9]%' THEN cast(substring(location,1,3) AS INT)
WHEN location like '[0-9][0-9]%' THEN cast(substring(location,1,2) AS INT)
ELSE 9999
END
Try this to avoid casting:
SELECT
x,
RIGHT('000' +LEFT (x,patindex('%[^0-9]%',x)-1),3) sort1,
RIGHT (x,LEN(x)-patindex('%[^0-9]%',x)+1) sort2
FROM
(
SELECT '123asdf' x
UNION
SELECT '12asdf'
UNION
SELECT '13asdf'
UNION
SELECT '12zsdf'
) X
ORDER BY sort1 ,sort2