how to change query from MYSQL to SQL SERVER for LIMIT - mysql

Question

how to change this MYSQL query to sql server
SELECT
id.value AS ICDCode,
items.itemName AS ProblemListDescription,
COUNT(*) as UsageCount
FROM problemlist pl
INNER JOIN items
ON pl.asmtId = items.itemId
LEFT OUTER JOIN itemdetail id
ON (items.itemId=id.itemId AND id.propId=13 )
WHERE (pl.SNOMED='' OR pl.SNOMED IS NULL) AND pl.deleteflag=0
group by id.value, items.itemName
ORDER BY UsageCount DESC, ICDCode ASC
LIMIT 0,10 ;
I have tried this for sql server but its throwing error
select * from
(
SELECT
id.value AS ICDCode,
items.itemName AS ProblemListDescription,
COUNT(*)as UsageCount ,
row_number() over (ORDER BY UsageCount DESC, ICDCode ASC ) as rownum
FROM problemlist pl
INNER JOIN items
ON pl.asmtId=items.itemId
LEFT OUTER JOIN itemdetail id
ON (items.itemId=id.itemId AND id.propId=13 )
WHERE (pl.SNOMED='' OR pl.SNOMED IS NULL) AND pl.deleteflag=0
group by id.value, items.itemName
) sno
WHERE rownum BETWEEN 0 AND 10 ;
error message is
column usagecount is invalid
column icdcode is invalid
what is the mistake or i have to do it in another way ? guide me

Answer 1

I would probably just use TOP here:
SELECT TOP 10
id.value AS ICDCode,
items.itemName AS ProblemListDescription,
COUNT(*) as UsageCount
FROM problemlist pl
INNER JOIN items
ON pl.asmtId = items.itemId
LEFT OUTER JOIN itemdetail id
ON (items.itemId=id.itemId AND id.propId=13 )
WHERE (pl.SNOMED='' OR pl.SNOMED IS NULL) AND pl.deleteflag=0
GROUP BY
id.value,
items.itemName
ORDER BY
UsageCount DESC, ICDCode
By the way, the error in your query is that you were referring to an alias in the ROW_NUMBER function, but the alias is not yet available at that point in the query. You could use the following instead:
ROW_NUMBER() OVER (ORDER BY COUNT(*) DESC, ICDCode) AS rownum