MS SQL SERVER PAGING - sql

Question

I did a query which is :
SELECT DISTINCT m.logID
FROM Monitor_data m
inner join Monitor_object o on (o.objID = m.domainID)
inner join Monitor_event e on (e.mainID = m.logID)
WHERE (o.name = #objName
and m.service = #service
and e.statement = #statement
and m.start >= #start
and m.end <= #end)
That allows me to get some id (VARCHAR(50)). But, now I want to make a pagination so I need to modify that query. Unfortunately, I cannot use LIMIT and OFFSET ... I may use ROW_NUMBER but I don't know how :/ It will be great to get a result corresponding to the rows at line n to m. Thus, I will be able to create a paging process easily.
Can someone help me ?
Thank you.

Answer 1

Try this query:
select logID from (
SELECT DISTINCT m.logID,
ROW_NUMBER() over (order by m.start) rn
FROM Monitor_data m
inner join Monitor_object o on (o.objID = m.domainID)
inner join Monitor_event e on (e.mainID = m.logID)
WHERE (o.name = #objName
and m.service = #service
and e.statement = #statement
and m.start >= #start
and m.end <= #end)
) a where rn between (m, n) --here you provide values for limits for rows to return
Above query is based on ROW_NUMBER function in SQL Server, which requires some ordering, so I assumed that m.start will provide an order (I think it start date or something :) ).

Answer 2

Use #PageIndex and PageSize for paging
declare #PageIndex int=1
declare #PageSize int=10
declare #RecordCount int
SET NOCOUNT ON;
SELECT
ROW_NUMBER() OVER (ORDER BY m.logID ) as RowNumber, DISTINCT m.logID
INTO #Results
FROM Monitor_data m
inner join Monitor_object o on (o.objID = m.domainID)
inner join Monitor_event e on (e.mainID = m.logID)
WHERE (o.name = #objName
and m.service = #service
and e.statement = #statement
and m.start >= #start
and m.end <= #end)
SELECT #RecordCount = COUNT(*) FROM #Results
SELECT
*, #RecordCount as RecordCount FROM #Results
WHERE
RowNumber BETWEEN (#PageIndex -1) * #PageSize + 1 AND (((#PageIndex -1) * #PageSize + 1) + #PageSize) - 1
DROP TABLE #Results

Answer 3

I think this is what you want.
Select logId from
(SELECT DISTINCT m.logID, Row_number() over (order by (select null)) as ranking
FROM Monitor_data m
inner join Monitor_object o on (o.objID = m.domainID)
inner join Monitor_event e on (e.mainID = m.logID)
WHERE (o.name = #objName
and m.service = #service
and e.statement = #statement
and m.start >= #start
and m.end <= #end))
where ranking between n and m

Answer 4

ORDER BY ******
OFFSET #ItemsPerPage * (#CurrentPage - 1) ROWS
FETCH NEXT #ItemsPerPage ROWS ONLY
DECLARE #CurrentPage int = 1;
DECLARE #ItemsPerPage int = 10;
SELECT DISTINCT m.logID
FROM Monitor_data m
inner join Monitor_object o on (o.objID = m.domainID)
inner join Monitor_event e on (e.mainID = m.logID)
WHERE (o.name = #objName
and m.service = #service
and e.statement = #statement
and m.start >= #start
and m.end <= #end)
ORDER BY m.logID
OFFSET #ItemsPerPage * (#CurrentPage - 1) ROWS
FETCH NEXT #ItemsPerPage ROWS ONLY
paging Example
DECLARE #myTable TABLE(Id int, Name nvarchar(50),EventDate date);
INSERT INTO #myTable(Id, Name, EventDate)
VALUES (1, 'a', '2018-01-01'),
(2, 'b', '2018-01-02'),
(3, 'c', '2018-01-03'),
(4, 'd', '2018-01-04'),
(5, 'e', '2018-01-05'),
(6, 'f', '2018-01-06');
DECLARE #CurrentPage int = 1;
DECLARE #ItemsPerPage int = 4;
SELECT * FROM #myTable
ORDER BY EventDate DESC
OFFSET #ItemsPerPage * (#CurrentPage - 1) ROWS
FETCH NEXT #ItemsPerPage ROWS ONLY

Answer 5

Starting with 2012, you could use OFFSET and FETCH. Prior to that a solution is to use ROW_NUMBER. However, beware, ROW_NUMBER() approach is very slow. If you don't have a performance problem you can use it.
Whatever the version is, a fast paging is done using TOP N and ordering by your desired columns and also specifying minimum value. ie:
select TOP (#pageSize) * from myTable
where myKeyValue > #minValue
order by myKeyValue;