Question

This I can’t get my simple brain around. A comma-delimited array of products ordered is passed to a procedure like so:

set @array = 'productID_47, productID_4'

select productID, price from Products 
where @array like '%' + productID + '%'

Two records are returned. Great.
But then if I have:

set @array = 'productID_47'

select productID, price from Products 
where @array like '%' + productID + '%'

Again, two records are returned which is NOT what I want.
The product codes are fixed, sadly.

Any help would be appreciated, thanks

Answer 1

I am assuming there are no commas when there is only one item in @array:

select productID, price 
from Products  
where @array = productID --only one item, can use index
    or @array like productID + ',%'  --array starts with item, can use index
    or @array like '%, ' + productID + ',%' --item is in the middle of @array, cannot use index
    or @array like '%, ' + productID --item is at the end of @array, cannot use index
    or @array like '%,' + productID