Opening a Table in SQL Server

Question

Hello everyone, I'm trying to open a table, but I received this error:

Msg 512, Level 16, State 1, Line 1
Subquery returned more than 1 value. This is not permitted when the subquery follows =, !=, <, <= , >, >= or when the subquery is used as an expression.

I hope someone can guide me on how to resolve this. Thank you so much.

Naimish Makwana · Answer

The query you’re running seems straightforward and it shouldn’t typically result in the error you’re seeing. The SELECT TOP 1 * FROM policyheader query should return the first row from the policyheader table. However, if you’re still getting the error, it might be due to one of the following reasons: Triggers : There might be a trigger on the policyheader table that is executing a subquery returning more than one row. Views : If policyheader is a view, not a table, then the view definition might include a subquery that is returning more than one row. To debug this, you could check if there are any triggers on the policyheader table or if policyheader is a view with a problematic subquery. You can do this by using the sp_helptext stored procedure for views or sp_helptrigger for triggers. Here’s how you can use them: -- If policyheader is a view EXEC sp_helptext 'policyheader'; -- If policyheader is a table with a trigger EXEC sp_helptrigger 'policyheader'; These commands will return the definitions of the view or triggers, which you can then inspect for problematic subqueries. If you find such subqueries, you’ll need to modify them to ensure they always return a single value. Thanks

Naveen Kumar · Answer

Hello Jes, Can you post the definition of the PolicyHeader table/view. If it is a table, check any computed columns or functions are are used to calculate any column values. Ensure the functions return single result set. If it is a view, check for any subqueries used and the result of it. Thanks!

Jignesh Kumar · Answer

Hello, This error prompts when you have a sub query. But in your query window, I am not able to see any sub-query. Could you please try to close all ope window first and then open new window and put you single query, Select top 1 * from policyheader;

Jaimin Shethiya · Answer

Hello Jes, Can you double check that is the View on the table? (PolicyHeader) And if possible, can you double check the view (PolicyHeader), mightbe some place added sub query and it's giving a return more than one row, that's why you face this error. Thanks

Jes Sie · Answer

Hi Naimish, thanks for the reply. I ran the query you suggested, and both of them returned null.

Jes Sie · Answer

Hi Kiran, Thanks for the reply. I tried the query you suggested, but I still received the same error.

Kiran Girase · Answer

Hi Jes, Try with where or order by clause e.g. SELECT TOP 1 * FROM PolicyHeader ORDER BY YourColumnName; or SELECT * FROM PolicyHeader WHERE PolicyID = 'your_policy_id';