I have been having trouble query after '['']' in table. The data is inserted from pandas dataframe with datatype object (if it matters).
I want to get make a view without the empty lists. Have tried to write the empty list different ways '['']' , '["''"]' etc. but i cant get it to work.
ex where meta_keywords <> '['']'
If meta_keywords is a string, you would use:
where meta_keywords <> '['']'
or:
where meta_keywords <> '['''']'
Or perhaps it is hard to tell what those middle characters really are and you can use the length:
where length(meta_keywords) > 4
If it is an array (which I am guessing), then one of these might work:
where cardinality(meta_keywords) > 0
or:
where '' <> meta_keywords[1] and cardinality(meta_keywords) = 1
Related
I have the following code running in part of excel data query getting information from excel
`
DateTable.FiscalYear IN (?-1,?)
AND DateTable.Week = ?
AND ProductInformation.Brand = 'Drunk Elephant'
AND StoreInformation.Retailer IN CASE
WHEN ? = 'Boots' THEN ('Boots')
WHEN ? = 'Cult Beauty' THEN ('Cult Beauty')
WHEN ? = 'DTC' THEN ('DTC')
WHEN ? = 'Look Fantastic' THEN ('Look Fantastic')
WHEN ? = 'Space NK' THEN ('Space NK')
ELSE (SELECT
DISTINCT StoreInformation.Retailer
FROM
Sellout
INNER JOIN
ProductInformation
ON
Sellout.EAN = ProductInformation.EAN
INNER JOIN
StoreInformation
ON
sellout.StoreNumber = StoreInformation.StoreNumber
WHERE
ProductInformation.Brand = 'Drunk Elephant')
END
`
The ? are referencing cells in excel to bring back values. The code was running originally running fine with = CASE, but the I had to add in the final else clause, which brings back multiple results, so = no longer works. And putting the IN causes it to break, even if I remove the else and have just IN CASE.
Any ideas how to can run this case in the where clause, working if the result of the CASE is either a single value or a sub-query table?
Thanks in advance!
I have tried it with = CASE and without the ELSE, which work. Adding the ELSE brings back an error saying subquery brings back more then 1 value, which is why i tried with IN instead of =.
But having just IN without the ELSE also causes an error.
I'm reading and executing sql queries from file and I need to inspect the result sets to count all the null values across all columns. Because the SQL is read from file, I don't know the column names and thus can't call the columns by name when trying to find the null values.
I think using CTE is the best way to do this, but how can I call the columns when I don't know what the column names are?
WITH query_results AS
(
<sql_read_from_file_here>
)
select count_if(<column_name> is not null) FROM query_results
If you are using Python to read the file of SQL statements, you can do something like this which uses pglast to parse the SQL query to get the columns for you:
import pglast
sql_read_from_file_here = "SELECT 1 foo, 1 bar"
ast = pglast.parse_sql(sql_read_from_file_here)
cols = ast[0]['RawStmt']['stmt']['SelectStmt']['targetList']
sum_stmt = "sum(iff({col} is null,1,0))"
sums = [sum_sql.format(col = col['ResTarget']['name']) for col in cols]
print(f"select {' + '.join(sums)} total_null_count from query_results")
# outputs: select sum(iff(foo is null,1,0)) + sum(iff(bar is null,1,0)) total_null_count from query_results
select fti.pa_serial_,fti.homeownerm_name,fti.ward_,fti.villagetole,fti.status,
ftrq.date_reporting, ftrq.name_of_recorder_reporting,
case
when fti.status='terminate' then ftrq.is_the_site_cleared ='1' end as is_the_site_cleared from fti join ftrq on ftrq.fulcrum_parent_id = fti.fulcrum_id
Here, is_the_site_cleared is text type of column which is converted into boolean by the when statement written and hence does not print as 1 and takes as true. I explicitly used print '1'. But this also did not work. My aim is to display '1' in the column 'is_the_site_cleared' when the value of fti.status='terminate'. Please help!!!
How about using integers rather than booleans?
select fti.pa_serial_, fti.homeownerm_name, fti.ward_,
fti.villagetole, fti.status, ftrq.date_reporting,
ftrq.name_of_recorder_reporting,
(case when fti.status = 'terminate' -- and ftrq.is_the_site_cleared = '1'
then 1 else 0
end) as is_the_site_cleared
from fti join
ftrq
on ftrq.fulcrum_parent_id = fti.fulcrum_id ;
From the description, I cannot tell if you want to include the condition ftrq.is_the_site_cleared = '1' in the when condition. But the idea is to have the then and else return numbers if that is what you want to see.
Hi people :) I'm having trouble with a null result, when I compare the query it said I cant it give the following error "sequence contains no elements"
Dim existe = (
From p In abc.Ventadetalles
Where p.idarticulo = txtArticulo.Text
And p.idventa = IdventaTextBox.Text
Select p).Single
here is the code
The error is correct: the sequence has no elements! You are using Single(), so empty sequences produce an error. If you'd like to instead return the default value, then use SingleOrDefault().
If you expect there to actually be elements in the sequence, then double-check your conditions and source data again.
Try using SingleOrDefault. This should work.
Alternatively you could use Any() since it looks like you are trying to test for existence.
The following will work:
Dim existe = (
From p In abc.Ventadetalles
Where p.idarticulo = txtArticulo.Text
And p.idventa = IdventaTextBox.Text
Select p).SingleOrDefault()
If existe Is Not Nothing Then
'' here you can use existe
End If
I need to pull back records based on a location ID, but I've got two fields that MAY contain the incoming criteria....
something like this
SELECT * FROM tbl
WHERE myVar = locationID
IF LocationID = 0
myVar = location2ID
this is a 'logical' example...
I think I can do
WHERE myVar = CASE WHEN locationID = 0 THEN location2ID ELSE locationID END
although I've read that CASE in a WHERE clause should be avoided...? why? or is this OK?
- either way it FAILS
WHERE CASE WHEN locationID=0 THEN location2ID=myVAr ELSE locationID=myVar END
also FAILS
thx
Sorry for the confusion lads - didn't mean to be "ambiguous" - looks like #2 will do what I want - but for the clarification requested here is the issue...
the table stores TWO locations, let's call then CURRENT_LOC and ORIGINAL_LOC... in most cases these will BOTH have data, but in some cases the 'thing' hasn't moved... so the CURRENT_LOC is '0'. MY issue is I'll be passing in a LOCATION ID, I want the records where CURRENT_LOC matches OR if the the CURRENT_LOC=0 then I ALSO want the ORIGINAL_LOC... where that matches...
does that help the discussion? I hope.
WHERE myVar = COALESCE(NULLIF(locationID, 0), location2ID)
Alternatively,
WHERE (
(locationID <> 0 AND myVar = locationID)
OR
(locationID = 0 AND myVar = location2ID)
)