Using a SQL Function to Return a Column Number

Question:
Is it possible to return a number in a column, using a function, for each row in my result set? For example:

"Select RowNum As Rw, Fname, Birth From Employee." 

I am using Visual Basic 6.0.

Answer:
What you require is possible, and there are a couple of ways for you to do it.

Most RDBMSs have a sequential number generator. In MS SQL the number generator is called the Identity property, which is not really a function, but a datatype.

The first thing you’ll need to take advantage of this built-in function is a column created in your table with the identity property set. Do this in the CREATE statement of the table you’re working on&#151to the effect of:

 create table mytable (mycountingcolumn int identity(1,1))insert mytable default valuesselect * from mytable

You should see a one-column table with a 1 in the first row.

If you already have a table set up and want to number the rows after the fact, you can create a mirror image of your table. Include the identity column definition and select into the new table. The identity column will fill itself up according to the starting point and increment you specified in the CREATE or ALTER TABLE statements.

Share the Post:
Share on facebook
Share on twitter
Share on linkedin

Overview

The Latest

technology leadership

Why the World Needs More Technology Leadership

As a fact, technology has touched every single aspect of our lives. And there are some technology giants in today’s world which have been frequently opined to have a strong influence on recent overall technological influence. Moreover, those tech giants have popular technology leaders leading the companies toward achieving greatness.

iOS app development

The Future of iOS App Development: Trends to Watch

When it launched in 2008, the Apple App Store only had 500 apps available. By the first quarter of 2022, the store had about 2.18 million iOS-exclusive apps. Average monthly app releases for the platform reached 34,000 in the first half of 2022, indicating rapid growth in iOS app development.

microsoft careers

Top Careers at Microsoft

Microsoft has gained its position as one of the top companies in the world, and Microsoft careers are flourishing. This multinational company is efficiently developing popular software and computers with other consumer electronics. It is a dream come true for so many people to acquire a high paid, high-prestige job