Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
164 views
in Technique[技术] by (71.8m points)

Difference between Top and Limit Keyword in SQL

A quick Question. Suppose I have the following two queries:

SELECT TOP 2 * FROM Persons;

and

SELECT * FROM Persons limit 2;

I want to know the difference between the execution of the above 2 queries? Basically, I want to know when should I use the limit keyword and when it is appropriate to use the top keyword. Also, How does the database return results based on the above 2 queries.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

If you are using SQL Server use TOP if you are using MySQL or Postgres use Limit!

AFAIK there is no product that currently supports both. Here's one list of current implementations and here's another (covers more products but in less detail)


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...