where-clause

BigQuery at the top gets a set of Products and nested related tables. Then, I apply filtering in a poor attempt at a specification pattern. This is the filter code. There are three tables in the query, and I want to filter the top query by the value nested in the bottom query. Like I said, this currently produces the results we want. However, the .Contains() produces a SQL WHERE EXISTS() clause for each. We really only need one, but I don't know how to get the inner ID to compare with the outer ID. from p in bigQuery // Root table where ( from pp in p.LPP // Level 1 nested table where (from pv

I'm trying to set the where clause on a LinqDataSource object bound to a GridView programmatically on a button click, but when the GridView rebinds data (for instance, when the user sorts) the Where clause resets back to the empty string. Is there a way to prevent this, or is there a better way to filter my results? justin.lovell Perhaps you just add a ViewState property into your page/user control and then retrieve it on all post back? public string MyLinqSourceWhere { get { return (string)this.ViewState["MyLinqSourceWhere"]; } set { this.ViewState["MyLinqSourceWhere"] = value; } } public

Can't seem to reach the next step in my update query. I'm able to successfully view columns related to the select no problem: SELECT sales_flat_order_grid.entity_id,sales_flat_order_grid.increment_id,sales_flat_order.coupon_code FROM sales_flat_order_grid INNER JOIN sales_flat_order ON sales_flat_order_grid.entity_id = sales_flat_order.entity_id WHERE sales_flat_order_grid.increment_id = "12345678"; This shows 3 columns all where related to the correct increment_id. The next step is to update the sales_flat_order.coupon_code field. Here is my attempt: UPDATE sales_flat_order INNER JOIN sales

I have to run a query like this (query 1) - select something from sometable where someId in (1,2,3) I would like to keep a variable for the IDs part, like this (query 2) - set @myIds = "1,2,3"; select something from sometable where someId in (@myIds); But this does not give the expected result (gives an empty result set), and no query error as well. I checked that if I wrap the comma separated IDs inside quotes, the query results an empty result set (query 3) - select something from sometable where someId in ("1,2,3"); I guess when I am using variable @myIds like I showed above (query 2), it

What exactly does a LINQ function return when there are no matches? Take the Where method, for example: var numbers = Enumerable.Range(1, 10); var results = numbers.Where(n => n == 50); What would be in results at this point? results itself is just a query. Until you start to iterate through it (either explicitly or via a call like Count() ), nothing has checked whether there are any results or not. It's only when you enumerate it that anything will happen. So you could do: foreach (int x in results) { Console.WriteLine("This won't happen"); } Or: Console.WriteLine(results.Any()); // Will

The docs for Pg's Window function say : The rows considered by a window function are those of the "virtual table" produced by the query's FROM clause as filtered by its WHERE, GROUP BY, and HAVING clauses if any. For example, a row removed because it does not meet the WHERE condition is not seen by any window function. A query can contain multiple window functions that slice up the data in different ways by means of different OVER clauses, but they all act on the same collection of rows defined by this virtual table. However, I'm not seeing this. It seems to me like the Select Filter is very

I use LINQ to create my where clause like so: var query = from x in context.Xs select x; if (y == ...) { query = query.Where(x => x.Y == 1); } I have bunch of these "if .... where" statements. The issue I have is that all of those wheres join where clauses using AND but I need all my where clauses to use OR. Is there an easy way to port this code into where OR code? Or even what is the easiest way to do this with OR? Thanks. PredicateBuilder is the perfect solution for your problem. It allows you to keep adding individual "AND" as well as "OR" statements together. You could do something like:

I am new to cassandra and I am using it for analytics tasks (good indexing needed ). I read in this post (and others): cassandra, select via a non primary key that I can't query my DB with a non-primary key columns with WHERE clause . To do so, it seems that there is 3 possibilities (ALL with major disadvantages): Create a secondary index (not recommended for performance issues). Create a new table (I don't want redundant data even if it's ok with cassandra). Put the column I want to query by within the primary key and in this case I need to define all the parts of the primary key in my WHERE