I have json stored in one of the columns in SQL Server and I need to modify it to remove the square brackets from it. The format is as below. Can't seem to find a good way of doing it.
[ { "Message":"Info: this is some message here.", "Active":true } ]
One way is to do it using below query, but this query is very very slow and I need to run on a very large set of data.
select a.value
from dbo.testjson e
cross apply OPENJSON(e.jsontext) as a
where isjson(e.jsontext) = 1
The only other way I can think of is just doing string manipulation but it can be error prone. Could someone help with this?
Ok, figured it out:
select
json_query(
'[{"Message":"Info: this is some message here.","Active":true}]',
'$[0]'
)
This will return the inner message.
You should add the property name, in this case Message, in order to get only that part. Keep in mind that it's case sensitive. Something like;
select json_value('[{"Message":"Info: this is some message here.","Active":true}]', '$[0].Message')
Related
I have a SQL request that is almost perfect (for what I want to do):
WITH liste_fichiers_joints AS (
SELECT
id_dans_table,
ARRAY_AGG (row_to_json(f)) ids_fichier
FROM
fichiers_joints fj
LEFT JOIN fichiers f ON f.id = fj.id_fichier
WHERE
nom_table = 'taches'
GROUP BY
id_dans_table
)
SELECT t.id, t.nom, lfj.ids_fichier
FROM taches t
JOIN liste_fichiers_joints lfj ON lfj.id_dans_table = t.id
As you may have guessed, I'd like to get in the same request getting all the tasks: the id of a task, the name of the task but also in an array all the ids and names of the attached files if there are any.
The result is nearly what I want, but the last column displays this:
{"{\"uuid\":\"fd809b1f-6849-4322-a654-67f70c46a435\",\"nom\":\"test.png\",\"date\":\"2020-11-17T01:21:24.223354\",\"status\":\"TMP\",\"id\":185}"}
I'd like to remove the uuid and status parts, I tried some subrequests, up to no avail.
Also, I'd like to remove the backslashes \, because otherwise it will be complicated to use this column as a JSON in my Javascript.
Does anybody has a clue?
Thanks in advance.
You can use json[b]_build_object() instead of row_to_json[b](): it accepts a list of key/value pairs, so you have fine-grained control about what is going into your objects.
Also, you most likely want a JSON array, rather than a Postgres array of JSON objects.
I would recommend changing this:
ARRAY_AGG (row_to_json(f)) ids_fichier
To:
jsonb_agg(
jsonb_build_object('nom', f.nom, 'date', f.date, 'id', f.id)
) as ids_fichier
I have data from a query that looks like this:
SELECT
model_features
FROM some_db
which returns:
{
"food1": 0.65892159938812,
"food2": 0.90786880254745,
"food3": 0.88357985019684,
"food4": 0.99999821186066,
"food5": 0.99237471818924,
"food6": 0.62127977609634
}
{
"food4": 0.9999965429306,
"text1": 0.82206630706787
}
...
etc.
What I am eventually trying to do is simply get a count of each of the "food1", "food2" features,
but to do so (i think) I need to trim out the unnecessary numeric data. I'm at a loss as to how to do this, as everytime I try to simply unnest
SELECT
t.concepts
FROM some_db
CROSS JOIN UNNEST(model_features) AS t(concepts)
I get this error:
Column alias list has 1 entries but 't' has 2 columns available
Anyone mind pointing me in the right direction?
Solved this for myself: the issue was I needed to avoid dropping the second column of information in order for the query to execute. This may not be the canonical best way to approach, but it worked:
SELECT
t.concepts,
t.probabilities
FROM some_db
CROSS JOIN UNNEST(model_features) AS t(concepts,probabilities)
I'm trying to create new view from 2 different table of same schema. This is my query, let me know if I'm missing anything. When I check the syntax it is fine and test it, throws 00933 error.
CREATE OR REPLACE FORCE VIEW "APDA"."countview"
(
"dealidint", "companyidint", "nametxt", "county", "street",
"state", "city", "zip", "geocodelatdec", "geocodelongdec",
"volidint", "reportdate", "vehicletotalint", "salvagetotalint"
)
AS
SELECT a."dealidint",
a."companyidint",
a."nametxt",
a."county",
a."street",
a."state",
a."city",
a."zip",
a."geocodelatdec",
a."geocodelongdec",
c."dealervolumeidint",
c."reportdate",
c."vehicletotalint",
c."salvagetotalint"
FROM "APDA"."company" a
JOIN
"APDA"."volume" c
ON c."dealidint" = a."dealidint";
I don't see the reason. The only suspect thing I notice is the two blank lines. In SQLPlus I don't think these would cause this error, but they would cause the command to be misinterpreted.
My suggestions are:
- try a different tool. If you are getting the error in SQL Developer, try it in SQLPlus. It won't necessarily work, but you might get different feedback.
- reduce it to a minimal statement that works, then add elements back in one at a time until the error occurs
your column name "volidint" not in selected column, i see "dealervolumeidint" select vs "volidint".
Column name "volidint" is not available in your below select query. Please correct that by using "As".
CREATE OR REPLACE FORCE VIEW "APDA"."countview"
(
"dealidint", "companyidint", "nametxt", "county", "street",
"state", "city", "zip", "geocodelatdec", "geocodelongdec",
"volidint", "reportdate", "vehicletotalint", "salvagetotalint"
)
AS
SELECT a."dealidint",
a."companyidint",
a."nametxt",
a."county",
a."street",
a."state",
a."city",
a."zip",
a."geocodelatdec",
a."geocodelongdec",
c."dealervolumeidint" as "volidint",
c."reportdate",
c."vehicletotalint",
c."salvagetotalint"
FROM "APDA"."company" a
JOIN
"APDA"."volume" c
ON c."dealidint" = a."dealidint";
Thanks to all you pitched to answer my query. The one I have shared is a stripped down query with the same syntax. The query was fine but my actual query has an extra character on the join. Which is like - "APDA"."vvolume".
After that I was able to create the view.
Thanks again.
I have two queries which are almost identical. The only difference is the format of the fields being joined. One works, the other doesn't.
The query which JOINs two Integer fields works perfectly.
The query which JOINs two Long Text fields produces the following error:
"Cannot join on Memo, OLE, or Hyperlink Object (alarmlogwithstring2.[Tag_Value]=ECLString.[Tag_Value])."
Functional Query:
SELECT alarmlogwithdescs.TableIndex, alarmlogwithdescs.Date_Stamp, alarmlogwithdescs.Time_Stamp, alarmlogwithdescs.Tag_Name, alarmlogwithdescs.Tag_Value, ErrorCodeLookup.ErrorDescription
FROM ErrorCodeLookup INNER JOIN alarmlogwithdescs ON ErrorCodeLookup.[Tag_Value] = alarmlogwithdescs.[Tag_Value]
ORDER BY alarmlogwithdescs.TableIndex;
Nonfunctional Query:
SELECT alarmlogwithstring2.TableIndex, alarmlogwithstring2.Date_Stamp, alarmlogwithstring2.Time_Stamp, alarmlogwithstring2.Tag_Value, ECLString.ErrorDescription
FROM alarmlogwithstring2 INNER JOIN ECLString ON alarmlogwithstring2.[Tag_Value] = ECLString.[Tag_Value]
ORDER BY alarmlogwithstring2.TableIndex;
What I've Tried:
1.) I swapped the table following "FROM" to be ECLString with all necessary changes that should follow. (i.e. Then, after INNER JOIN I changed ECLString to be alarmlogwithstring2, etc...) This makes the two queries more identical, but shouldn't have an effect on the outcome. I did the same for the functional query just to be sure. The functional one still worked and the nonfunctional one still does not...
2.) I tried making my lookup table's Tag_Value field Short Text while keeping the actual data table's Tag_Value field Long Text. No effect.
3.) I tried changing the JOIN type when creating the relationship between the two tables. No effect.
4.) Changed alarmlogwithstring2.[Tag_Value]=ECLString.[Tag_Value]
to CAST(alarmlogwithstring2.[Tag_Value] AS varchar(max)) = CAST(ECLString.[Tag_Value] AS varchar(max)) and get the following error:
"Syntax error (missing operator) in query expression CAST(alarmlogwithstring2.[Tag_Value] AS varchar(max)) = CAST(ECLString.[Tag_Value] AS varchar(max))."
For whatever reason, after clicking "Ok" to close the error message the comma following SELECT alarmlogwithstring2.TableIndex, is highlighted, suggesting the missing operator is there. Okay?
Any help would be greatly appreciated. Thank you for your time!
Got it! Works for my situation, at least. Any other method for doing this would still be appreciated.
This works for me because my Tag_Value field contains text such as "Error0, Error1, Error2," etc...
So, I used the following code:
SELECT alarmlogwithstring2.TableIndex, alarmlogwithstring2.Date_Stamp, alarmlogwithstring2.Time_Stamp, alarmlogwithstring2.Tag_Value, ECLString.ErrorDescription
FROM alarmlogwithstring2 INNER JOIN ECLString ON Right( alarmlogwithstring2.[Tag_Value] , 1) = Right(ECLString.[Tag_Value], 1)
ORDER BY alarmlogwithstring2.TableIndex;
This works because of the integer on the end of my Tag_Value text. Using the Right(string,length) function causes only the integers within each value to be compared as they're all on the right-side of the value.
If your situation is similar to mine, then the code above is fine; however, if your number of error codes (or whatever) gets into the double digits, be sure to reflect this in the fields of both tables. (i.e. Make Error0 => Error00, make Error1 => Error01, etc...) within both tables and use Right(string,2) instead of Right(string,1). [Seems obvious, but may not be for everyone.]
However, this will NOT always be the case for me and everyone else. Someone may have pure text, for example. Thus, again, if you know of another, more general, solution, please, do let me know and I'll make your answer the answer for this question.
Thanks!
Got it. See below for general solution. It uses StrComp(string1,string2)=0 to match strings.
SELECT alarmlogwithstring2.TableIndex, alarmlogwithstring2.Date_Stamp, alarmlogwithstring2.Time_Stamp, alarmlogwithstring2.Tag_Name, alarmlogwithstring2.Tag_Value, ECLString.ErrorDescription
FROM alarmlogwithstring2 INNER JOIN ECLString ON StrComp(alarmlogwithstring2.[Tag_Value], ECLString.[Tag_Value]) = 0
ORDER BY alarmlogwithstring2.TableIndex;
I have some hard time figuring it out how to custom sort data below the way I want to. Meaning it should be in order like this:
201-1-1
201-1-2
201-1-3
.......
201-2-1
and so on if you know what I mean.
Instead I'm getting this sort executing below code:
select *
from test.dbo.accounts
order by account_name asc
Output:
201-10-1
201-10-2
201-1-1
201-11-1
201-11-2
201-11-3
201-11-4
201-11-6
201-1-2
201-12-1
201-12-2
201-12-3
201-12-4
201-12-6
201-1-3
201-13-1
201-13-2
201-13-3
201-13-4
201-13-6
201-1-4
201-14-1
201-14-2
201-14-4
201-14-6
201-15-1
201-15-2
201-15-3
201-15-4
201-15-6
201-1-6
201-16-1
201-16-2
201-16-3
201-16-4
201-16-6
201-16-7
201-1-7
201-17-1
201-17-2
201-17-4
201-17-6
201-18-1
201-18-2
201-18-3
201-18-4
201-18-6
201-19-1
Thanks
For your sample data, this following trick will work:
order by len(account_name), account_name
This only works because the only variable length component is the second component and because the hyphen is "smaller" than digits.
You should normalize the accounts names so all the components are the same length, by left padding the numbers with zeros.
Ugh. String manipulation in SQL can be extremely cumbersome. There might be a better way to do this, but this does seem to work.
select accoutn_name
from test.dbo.accounts
order by left(account_name,charindex('-',account_name,1)-1)
,replace(right(left(account_name,CHARINDEX('-',account_name,1)+2),2),'-', '')
,REPLACE(right(account_name,2),'-','')
BTW, this is a very expensive process to run. If it's productionalized, you'll want to come up with a better solution.