When you add the LIMIT clause to the SELECT statement, the returned rows are unpredictable.
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In addition to the above syntax, MySQL provides the following alternative LIMIT clause syntax: LIMIT row_count OFFSET offset Code language: SQL (Structured Query Language) ( sql ) The LIMIT and ORDER BY clausesīy default, the SELECT statement returns rows in an unspecified order. Therefore, these two clauses are equivalent: LIMIT row_count Code language: SQL (Structured Query Language) ( sql ) Opinions are my own.When you use the LIMIT clause with one argument, MySQL will use this argument to determine the maximum number of rows to return from the first row of the result set.
Use those practices that best benefit your needs and goals. Your particular goals and needs may vary. The majority, if not all, of the examples provided, are performed on a personal development/learning workstation-environment and should not be considered production quality or ready. They are not the utmost best solution(s).
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Among those, he shares a love of tabletop RPG games, reading fantasy novels, and spending time with his wife and two daughters.ĭisclaimer: The examples presented in this post are hypothetical ideas of how to achieve similar types of results. Other favorite activities find him with his nose buried in a good book, article, or the Linux command line. Josh Otwell has a passion to study and grow as a SQL Developer and blogger.
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Using MySQL LIMIT to Constrain The Number of Rows Returned By SELECT StatementĮxplore the official MySQL 5.7 Online Manual for more information.Feel free to leave any comments, thoughts, likes, dislikes, or corrections in the comments below. I have included sources for expanded study and reading in the list below. Prior to closing out the blog post, I must make mention that both options for the LIMIT clause must be positive integer constants. This query will take care of that, but to prohibit duplicates from taking up the top spots in the result set, I’ll use the DISTINCT clause on the amount column. Say we want the highest 5 amount values ordered from greatest to least. Take the amount column from the payment table.
Let’ look at an example query to clarify. Yet, LIMIT needs assistance here from the ORDER BY clause.įor this type of query, the ORDER BY clause is used to order a column (or columns) in ASC (ascending -the default) or DESC (descending) order.
In the list below, I have included links to great blog posts on SQL query execution order I find highly educational and interesting. These query results do not have more than 2 rows available for LIMIT to ‘act on’.
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