Question

I am doing a standard exercise where displaying fields of three tables in a gridview but however have a syntax error in my inner join statement.

Any advice perhaps on where the syntax error lies.

try
    {
        conn = new OleDbConnection(@"Provider=Microsoft.Jet.OleDb.4.0;
                                Data Source =" + Server.MapPath("App_Data\\Shopping List.mdb"));
        conn.Open();

        DataSet ds = new DataSet();

        OleDbDataAdapter dba = new OleDbDataAdapter(@"SELECT Ingredient.IngerdientId, Ingredient.IngredientName,  Area.AreaName, Recipe.RecipeName, Ingredient.Quantity 
                                                FROM Ingredient
                                                INNER JOIN Area ON Ingredient.AreaId = Area.AreaId
                                                INNER JOIN Recipe ON Ingredient.RecipeId = Recipe.RecipeId", conn);

        dba.Fill(ds);

        gridIngredients.DataSource = ds;
        gridIngredients.DataBind();
    }
    catch (Exception exe)
    {
        labMessage.Text = exe.Message; 

    }

Answer 1

The Access db engine requires parentheses when your FROM clause includes more than one join. I think this may do it, but you would be better off to build and test your SELECT statement within Access using its query designer if you can.

FROM (Ingredient
INNER JOIN Area ON Ingredient.AreaId = Area.AreaId)
INNER JOIN Recipe ON Ingredient.RecipeId = Recipe.RecipeId