I had to update the date values in the MSSQL database table for tests and demo. I needed to set random Dates from the specific range.

In the developer database (MS SQL Server) I had a field, in which all the values were the same. The value was "OldDoc.txt". I wanted to make values unique and for this I wanted to add "ID" before ".txt".

If you need to select the records between 2 dates in MS SQL, where the DateTime column contains both Date and Time, you can use SQL functions for WHERE clause and avoid of adding the time information like '23:59:59.000'. Though you can do it and this way.

The task is to build a tree in a table with parentID from bottom to top. It's useful for generating hierarchy strings, lists or any other types. You can also create a storage procedure of this and it will make it easy to use in queries.

There are at least 3 ways to find out if the column in table exists in MS SQL server. It's a common task for developers or administrators when you need to modify table.

(read more...)

There's a column Photo with type "Image" in MS SQL table (database – MS SQL Server 2008 R2). The task is to get all the records where Photo is empty. Values of empty images is "0x00000000".

(read more...)

To receive quantity of rows of the returned records of SQL query, you should use function @@ROWCOUNT. Function @@ROWCOUNT returns the quantity of rows, which were used in a query.

(read more...)

How to get as SQL query result the list of databases in SQL server.

select name, database_id  from sys.databases

When you modify columns of a table in MS SQL management studio, you got the message "Saving changes is not permitted. The changes you have made require the following table to be dropped and re-created … " (Figure 1). The reason of this is re-creating of table. It's really important for productive environment but not very for test ones.

(read more...)

It’s a little tutorial about how to get all duplicate records on namesakes example from your database table. For example, we have a table with columns Id, FullName, Birthdate and Phone.

Using 'GROUP BY' and 'HAVING' we can select all namesakes.  (read more...)