I'm accessing a Microsoft Access 2002 database (MDB) using ASP.NET through the OdbcConnection
class, which works quite well albeit very slowly.
My question is about how to implement pagination in SQL for queries to this database, as I know I can implement the TOP
clause as:
SELECT TOP 15 *
FROM table
but I am unable to find a way to limit this to an offset as can be done with SQL Server using ROWNUMBER. My best attempt was:
SELECT ClientCode,
(SELECT COUNT(c2.ClientCode)
FROM tblClient AS c2
WHERE c2.ClientCode <= c1.ClientCode)
AS rownumber
FROM tblClient AS c1
WHERE rownumber BETWEEN 0 AND 15
which fails with:
Error Source: Microsoft JET Database Engine
Error Message: No value given for one or more required parameters.
I can't work out this error, but I'm assuming it has something to do with the sub-query that determines a rownumber
?
Any help would be appreciated with this; my searches on google have yielded unhelpful results :(
If you wish to apply paging in MS Acces use this
SELECT *
FROM (
SELECT Top 5 sub.ClientCode
FROM (
SELECT TOP 15 tblClient.ClientCode
FROM tblClient
ORDER BY tblClient.ClientCode
) sub
ORDER BY sub.ClientCode DESC
) subOrdered
ORDER BY subOrdered.ClientCode
Where 15 is the StartPos + PageSize, and 5 is the PageSize.
EDIT to comment:
The error you are receiving, is because you are trying to reference a column name assign in the same level of the query, namely rownumber. If you were to change your query to:
SELECT *
FROM (
SELECT ClientCode,
(SELECT COUNT(c2.ClientCode)
FROM tblClient AS c2
WHERE c2.ClientCode <= c1.ClientCode) AS rownumber
FROM tblClient AS c1
)
WHERE rownumber BETWEEN 0 AND 15
It should not give you an error, but i dont think that this is the paging result you want.