Find Primary Column of all tables in database
This code helps in finding Primary Keys for all tables in a database.
2012-10-02 (first published: 2012-09-04)
1,451 reads
Primary Key (PK)
Find gaps in primary keys across multiple databases
Output table of gaps in a primary key across multiple databases on same, remote and/or linked servers.
2011-08-29 (first published: 2011-08-12)
970 reads
Do You Really Need Surrogate Keys? Part 1 – Concepts and Methods
This is the first of a series of articles to analyze the use of surrogate keys in different scenarios.
2010-10-25
14,150 reads
2010-07-15
3,947 reads
Getting unique or primary key columns for a given table
Following script will list out all the columns which have unique/primary key constraints for a given table.
2009-01-02 (first published: 2008-12-10)
1,292 reads
2008-11-04
1,971 reads
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The Empty Aggregate
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Question of the Day
The Empty Aggregate
I have this table in a SQL Server 2025 database:
CREATE TABLE [dbo].[CustomerOrder] ( [OrderID] [int] NULL, [CustomerID] [int] NULL, [total] [money] NULL ) ON [PRIMARY] GOWhat is returned from this code? (answers are for the sum and then the count)
SELECT SUM(total) AS sum,
COUNT(total) AS count
FROM dbo.CustomerOrder;
See possible answers