Select Values Based on ItemID OR String Value

Question

I am wanting to build a query that looks at an existing Models table.

Table Structure:

ModelID | ManufacturerID | CategoryID | ModelName

What I want to do is pass two things to the query, ModelID and ModelName, so that it returns the specific model and also similar models.

ModelName could be made up of several words e.g iPhone 5s 16GB, so what I would like my query to do is:

SELECT
     M.*
FROM
     Models AS M
WHERE
     (M.ModelID = 1840 OR M.ModelName LIKE '%iPhone%' 
     OR M.ModelName LIKE '%5s%' OR M.ModelName LIKE '%16GB%')

Is there a way that I can pass the ModelName to the query as a string and then have the query split the string to generate the OR statements?

Answer 1

OK, so I managed to get this working, following the advice given by Kevin Suchlicki re. fn_Split.

I have made this function even more complex than i intended to, but in order to help others out in a similar situation, here is my final solution:

DECLARE @CategoryID int = 1
DECLARE @ManufacturerID int = 3
DECLARE @ModelName varchar(100) = 'iPhone 5s 16GB'
DECLARE @ModelID int = 1840
DECLARE @Carrier varchar(10) = NULL
DECLARE @Colour varchar(10) = NULL

SELECT 
    I.*
FROM
    (
    SELECT 
        DISTINCT M.*
    FROM
        Models AS M
    JOIN
        dbo.fn_Split(@ModelName,' ') AS N
        ON M.ModelID = @ModelID OR lower(M.ModelName) LIKE '%'+ Lower(N.value) + '%'
    WHERE
        M.CategoryID = @CategoryID AND M.ManufacturerID = @ManufacturerID
    ) AS A
LEFT OUTER JOIN
    Items AS I ON A.ModelID = I.ModelID
WHERE
    I.Barred <> 1
    AND I.Locked <> 1
    AND I.Ber <> 1
    AND I.Condition = 'Working' 
    AND (LOWER(I.Colour) = LOWER(ISNULL(@Colour, I.Colour)) OR I.Colour IS NULL)
    AND (LOWER(I.Carrier) = LOWER(ISNULL(@Carrier, I.Carrier)) OR I.Carrier IS NULL)

I will now create this as a stored procedure to complete the job.

For reference, HERE is a link to the fn_Split function.

Answer 2

Do a web search for T-SQL split function. There are loads out there. They take a string (comma-delimited or space delimited or whatever) and return a table of values. Then just do a JOIN against that result set.

SELECT  DISTINCT M.*
FROM    Models AS M
        JOIN dbo.fn_split(@model_name, ' ') AS model_names 
            ON M.ModelID = @model_id OR m.ModelName LIKE '%' + model_names.value + '%';