Question

So I have data in my database & the value of category is set to “Breakfast“

When I execute the below Query with whereClause as

1:final String whereClause = RECIPE_ID + “=1”;

It returns me the data for that RECIPE_ID

But when I execute the query with whereClause as

2:final String whereClause = RECIPE_CATEGORY + “='” + category.trim() + “‘”;

It doesn’t return anything… So I guess my code is working fine as it returns result
RECIPE_ID but I donno why it doesn’t return data for the 2nd whereClause

Hope this makes sense..

final String whereClause = RECIPE_CATEGORY + "='" + category.trim() + "'";
        // ask the database object to create the cursor.
        cursor = db.query(
                RECIPE_TABLE,
                new String[]{
                            RECIPE_ID, 
                            RECIPE_CATEGORY,
                            RECIPE_THIS_TITLE,
                            RECIPE_THIS_SUBTITLE,
                            RECIPE_THIS_DESCRIPTION,
                            RECIPE_THIS_IMAGE,          
                            RECIPE_THIS_CALORIES,
                            RECIPE_THIS_FAT,
                            RECIPE_THIS_SATURATED,
                            RECIPE_THIS_TRANS,
                            RECIPE_THIS_CARBS,
                            RECIPE_THIS_SODIUM,
                            RECIPE_THIS_SUGARS,
                            RECIPE_THIS_SERVINGS,
                            RECIPE_THIS_COSTPERSERVING,
                            RECIPE_THIS_INSTRUCTIONS,
                            RECIPE_THAT_TITLE,
                            RECIPE_THAT_CALORIES,
                            RECIPE_THAT_FAT,
                            RECIPE_THAT_SATURATED,
                            RECIPE_THAT_TRANS,
                            RECIPE_THAT_CARBS,
                            RECIPE_THAT_SODIUM,
                            RECIPE_THAT_SUGARS,
                            RECIPE_THAT_PRICE
                        },
                        whereClause, null, null, null, null
        );

The above code will not return any results. Is anything wrong with it?

Answer 1

You really need to form a question here. Posting code does you no good. If your question is as you title implies, then yes you can do a search clause as a string. Just leave out the where. eg dataId = 5 where ‘where’ is implied.

Edit: to address the question at the bottom that I missed, multiple things could be wrong. One may be that you dont have any data in the database. Or the where clause is executed and none of your data fits the criteria. Check your database. We can’t help with that.