Query Performance Comparison

What is faster: two LIKE statements or one BETWEEN?

((MyData LIKE '02105_') OR ((MyData LIKE '02106_)MyData BETWEEN '021050' AND '021069'

Please advise.

When trying to decide which is the faster SQL for a particular query, my philosophy is to test the two options rather than making an educated guess.

Using version 7, I created a table with 100,000 rows with data similar to your example. Then I turned on show stats i/o and ran the two versions you provided. There was absolutely no difference in performance. That makes sense because, in both cases, the optimizer took advantage of an index on that column.

However, you should realize that your queries are not exactly the same. The LIKE keyword will return a match on the value ‘02105’, while the query using the BETWEEN statement will skip that row.

Here is the code I used to test your queries:

use pubsgoset nocount ongoif exists(select * from sysobjects where type = 'U' and name = 'liketest')   drop table liketestgocreate table liketest(   i char(6) constraint pk_liketest        primary key (i))godeclare @i intselect @i = 0while @i < 100000begin     insert into liketest (i) values ( convert(char,(floor(rand(@i)* 1000000)),0))         select @i = @i + 1endselect * fromliketest wherei LIKE '12105_' OR i LIKE '12106_'select *from liketest wherei BETWEEN '121050' AND '121069'

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


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