to the unique index in the table variable above

in fact how could we force sql server use the unique index when we know it would be more efficient then using a scan in the PK index

select * from @T where col2 = 2
is not using the unique index

Could you please help me with this:
I have a table variable
DECLARE @T TABLE
(
col1 INT NOT NULL PRIMARY KEY,
col2 INT NOT NULL,
filler CHAR(200) NOT NULL DEFAULT(‘a’),
unique(col2,col1)
);
how could I force using the unique index as it does not have a name

I am currently working on a project that requires me to dynamically build site navigation using recursive loop. Once a user select a category from navigation or provide a search keyword, the selected category/keyword acts as a filter to re-generate the entire navigation.

I have the navigation listing generated and with every category in the navigation I need to put a count for the available recipes that lie under that category after applying the filters, i.e. if I have selected category 1 and 2, and I have a keyword “chicken” my query should re-generate the navigation and then along with each category it should put a count that tells me how many remaining recipes each category holds that is common in the selected filters cat 1 and 2, and also has a keyword chicken.

I am using an intersect to pick the common recipes that exists in the provided filters (selected categories) and the category in the loop. The query I have gives accurate results but the execution time is too slow due to intersect.

SELECT Categories.CategoryID, Categories.CategoryTitle, CategorySEO.PageTitle,
(SELECT Count(*) AS xCount
FROM
(SELECT Count(ItemID) as xCount
FROM Collections C WITH (INDEX(i__au_CategoryID))
INNER JOIN Recipes R WITH (INDEX(i__au_RecipeTitle)) ON C.ItemID = R.RecipeID
WHERE C.CategoryID = Categories.CategoryID
AND C.ItemID IN (
(SELECT ItemID
FROM Collections WITH (INDEX(i__au_CategoryID))
WHERE (CategoryID = 15)) –Category Filter 1
INTERSECT
(SELECT ItemID
FROM Collections WITH (INDEX(i__au_CategoryID))
WHERE (CategoryID = 125)) –Category Filter 2
)
–GROUP BY C.ItemID
AND R.RecipeTitle LIKE ‘%chicken%’ –Keyword Filter
GROUP BY C.ItemID,R.Active
HAVING R.Active=1
) AS derivedtbl_1
) AS RecipeCount
FROM Categories
LEFT JOIN CategorySEO ON Categories.CategoryID = CategorySEO.CategoryID
WHERE (Categories.ParentCategory = 2) AND (Categories.Active = 1) AND (Categories.CategoryTitle’Uncategorized’)
ORDER BY Categories.CategoryID

As you can see I have applied indexing on columns categoryid and recipetitle. But doesn’t seems to be giving any better performance.

Any thoughts?

Nabil

could you please let us explain on which columns we should create a clustered/non-clustered index on a table.
for example there is a query select col1,col2,col3, col4,col 5 from table1 where col3 > 5 and col3 < 10.
and moreover, this query is used quite heavily for a specific dept, and i want to create a index on it, then which columns i should consider for creating index on this above table.

SELECT *
FROM Person
WITH (INDEX(AK_Contact_rowguid))

Any clues as to how this can be achieved.