Hello I have created a view, but want to pivot it.
OUTPUT before pivoting:
expected output:
my full query:
SELECT *
FROM CROSSTAB(
'SELECT DISTINCT GROUP_DEST::TEXT,DEST::TEXT,TIER::TEXT,RATE::TEXT FROM VBB_TIER ORDER BY 1,2')
AS CT(ROW_NAME TEXT, TIER_1 TEXT, TIER_2 TEXT )
I getting this error and unable to resolve:
ERROR: invalid source data SQL statement
DETAIL: The provided SQL must return 3 columns: rowid, category, and values.
SQL state: 22023
Using filtered aggregation is typically a lot easier than the somewhat convoluted crosstab() function:
select group_dest,
dest,
max(rate) filter (where tier in ('0-100', ('0-150')) as tier_1,
max(rate) filter (where tier in ('101-200', '151-350') as tier_2
from vbb_tier
group by group_dest, dest;
Related
how are you?
I needed to store an array of numbers as JSONB in PostgreSQL.
Now I'm trying to calculate stats moments from this JSON, I'm facing some issues.
Sample of my data:
I already was able to convert a JSON into a float array.
I used a function to convert jsonb to float array.
CREATE OR REPLACE FUNCTION jsonb_array_castdouble(jsonb) RETURNS float[] AS $f$
SELECT array_agg(x)::float[] || ARRAY[]::float[] FROM jsonb_array_elements_text($1) t(x);
$f$ LANGUAGE sql IMMUTABLE;
Using this SQL:
with data as (
select
s.id as id,
jsonb_array_castdouble(s.snx_normalized) as serie
FROM
spectra s
)
select * from data;
I found a function that can do these calculations and I need to pass an array for that: https://github.com/ellisonch/PostgreSQL-Stats-Aggregate/
But this function requires an array in another way: unnested
I already tried to use unnest, but it will get only one value, not the entire array :(.
My goal is:
Be able to apply stats moment (kurtosis, skewness) for each row.
like:
index
skewness
1
21.2131
2
1.123
Bonus: There is a way to not use this 'with data', use the transformation in the select statement?
snx_wavelengths is JSON, right? And also you provided it as a picture and not text :( the data looks like (id, snx_wavelengths) - I believe you meant id saying index (not a good idea to use a keyword, would require identifier doublequotes):
1,[1,2,3,4]
2,[373,232,435,84]
If that is right:
select id, (stats_agg(v::float)).skewness
from myMeasures,
lateral json_array_elements_text(snx_wavelengths) v
group by id;
DBFiddle demo
BTW, you don't need "with data" in the original sample if you don't want to use and could replace with a subquery. ie:
select (stats_agg(n)).* from (select unnest(array[16,22,33,24,15])) data(n)
union all
select (stats_agg(n)).* from (select unnest(array[416,622,833,224,215])) data(n);
EDIT: And if you needed other stats too:
select id, "count","min","max","mean","variance","skewness","kurtosis"
from myMeasures,
lateral (select (stats_agg(v::float)).* from json_array_elements_text(snx_wavelengths) v) foo
group by id,"count","min","max","mean","variance","skewness","kurtosis";
DBFiddle demo
I have Lookup Activity in Azure Data Factory.
I have parameter "offset", which have initial value 5.
I want to use parameter value as Integer value in Lookup query, but failing. Please advice.
Original Static Lookup Query:
SELECT *
FROM sales.[Customers]
ORDER BY CustomerId OFFSET 5 ROWS FETCH NEXT 10 ROWS ONLY
--Parameterized Lookup Query:
SELECT *
FROM sales.[Customers]
ORDER BY CustomerId #concat('OFFSET ', pipeline().parameters.offset,' ROWS FETCH NEXT 10 ROWS ONLY')
Error of ADF for parameterized Lookup:
A database operation failed with the following error: 'Incorrect syntax near
'#concat'.',Source=,''Type=System.Data.SqlClient.SqlException,Message=Incorrect syntax near
'#concat'.,Source=.Net SqlClient Data
Provider,SqlErrorNumber=102,Class=15,ErrorCode=-2146232060,State=1,Errors=
[{Class=15,Number=102,State=1,Message=Incorrect syntax near '#concat'.,},],'
Put the entire SQL statement in an expression (using the Expression Builder):
#concat('SELECT * FROM sales.[Customers] ORDER BY CustomerId OFFSET ', pipeline().parameters.offset, ' ROWS FETCH NEXT 10 ROWS ONLY')
You can directly call the parameter as well
SELECT *
FROM sales.[Customers]
ORDER BY CustomerId OFFSET #{pipeline().parameters.offset} ROWS FETCH NEXT 10 ROWS ONLY
I have a json column (json_col) in a postgres database with the following structure:
{
"event1":{
"START_DATE":"6/18/2011",
"END_DATE":"7/23/2011",
"event_type":"active with prior experience"
},
"event2":{
"START_DATE":"8/20/11",
"END_DATE":"2/11/2012",
"event_type":"active"
}
}
[example of table structure][1]
How can I make a select statement in postgres to return the start_date and end_date with a where statement where "event_type" like "active"?
Attempted Query:
select person_id, json_col#>>'START_DATE' as event_start, json_col#>>'END_DATE' as event_end
from data
where json_col->>'event_type' like '%active%';
Returns empty columns.
Expected Response:
event_start
6/18/2011
8/20/2011
It sounds like you want to unnest your json structure, ignoring the top level keys and just getting the top level values. You can do this with jsonb_each, looking at resulting column named 'value'. You would put the function call in the FROM list as a lateral join (but since it is a function call, you don't need to specify the LATERAL keyword, it is implicit)
select value->>'START_DATE' from data, jsonb_each(json_col)
where value->>'event_type' like '%active%';
I'm trying to make a query in PostgreSQL for include results from 2 (or more) tables using left join lateral, and I need to have one record for each record for table entidad_a_ (main table) and all the records from table entidad_b_ must be included in one field generated by array_agg. And in this array, I have to delete duplicate elements and I have to preserve order array in main table.
I need to execute this SQL query:
SELECT entidad_a_._id_ AS "_id", CASE WHEN count(entidadB) > 0 THEN array_agg(DISTINCT entidadB._id,ordinality order by ordinality)
ELSE NULL END AS "entidadB"
FROM entidad_a_ as entidad_a_, unnest(entidad_a_.entidad_b_) WITH ORDINALITY AS u(entidadb_id, ordinality)
LEFT JOIN LATERAL (
SELECT entidad_b_3._id_ AS "_id", entidad_b_3.label_ AS "label"
FROM entidad_b_ as entidad_b_3
WHERE entidad_b_3._id_ = entidadb_id
GROUP BY entidad_b_3._id_
LIMIT 1000 OFFSET 0
) entidadB ON TRUE
GROUP BY entidad_a_._id_
LIMIT 1000 OFFSET 0
But I have errors....
How can I have these results?
Edited:
My error is:
ERROR: function array_agg (integer, bigint) does not exist
SQL state: 42883
Hint: No function matches the given name and argument types. You might need to add explicit type casts.
Character: 69
If the query is:
......array_agg (DISTINCT entidadB._id order by ordinality).....
The eror is:
ERROR: in an aggregate with DISTINCT, ORDER BY expressions must appear in argument list
SQL state: 42P10
Character: 110
My problem is the combination of array_agg, DISTINCT, and ORDER by
Solved!! I've created a postgres extension with a custom aggregation.
CREATE AGGREGATE array_agg_dist (anyelement)
(
sfunc = array_agg_transfn_dist,
stype = internal,
finalfunc = array_agg_finalfn_dist,
finalfunc_extra
);
Creating functions and c code for this custom functions.
I would like to filter results for the same column with multiple values
example in sql:
SELECT * FROM myTable WHERE status = 1 AND current_condition = ("New", "Working")
this will return all rows from myTable where the status is 1 and the current_condition is "New" OR "Working"
how do I do this in SQLite.swift?
You can use raw SQL in Swift. So you can use the string you posted.
Raw SQL
Using Filters
I use Filters, gives me more insight.