所以我们可以确定这个SQL执行时是会找到limit要求的行后立马返回查询结果的。 不过就算它立马返回,为什么分页会不准呢? 官方文档里面做了如下说明: If multiple rows have identical values in the ORDER BY columns, the server is free to return those rows in any order, and may do so differently depending ...
二、“order by”引发的乱序 经过一番排查,发现罪魁祸首其实是order by。当使用order by的字段存在多行相同值时,就会导致上面出现的乱序问题,这里我们来看下官方的解释[1]: ❝If multiple rows have identical values in theORDER BYcolumns, the server is free to return those rows in any order, ...
If multiple rows have identical values in theORDER BYcolumns, the server is free to return those rows in any order, and may do so differently depending on the overall execution plan. In other words, the sort order of those rows is nondeterministic with respect to the nonordered columns. 上...
Example: ORDER BY DESC in SQL ORDER BY With Multiple Columns We can also useORDER BYwith multiple columns. For example, -- sort all rows from Customers, first by first_name and then by ageSELECT*FROMCustomersORDERBYfirst_name, age; Run Code Here, the SQL command selects all the records...
这种行为的一种表现是带有和不带有 LIMIT 的 ORDER BY 查询可能会以不同的顺序返回行,如本节后面所述。 原文: If multiple rows have identical values in the ORDER BY columns, the server is free to return those rows in any order, and may do so differently depending on the overall execution plan...
SQL ORDER BY is versatile. Use theORDER BYkeyword to sort results with a SELECT statement. You can sort over multiple columns, in both ascending and descending order. Table of contents Introduction to SQL ORDER BY SQL ORDER BY Two Columns ...
For example, the following query shows all the tracks ordered by the album_id. Try sorting it by other columns. Can you modify it to be sorted by their name?SELECT * FROM tracks ORDER BY album_id;You can list multiple things to ORDER BY, which is useful in the case where there are...
Bug #47280strange results from count(*) with order by multiple columns without where/group Submitted:11 Sep 2009 18:32Modified:18 Dec 2009 13:21 Reporter:Shane Bester(Platinum Quality Contributor)Email Updates: Status:ClosedImpact on me: ...
If multiple rows have identical values in theORDER BYcolumns, the server is free to return those rows in any order, and may do so differently depending on the overall execution plan. In other words, the sort order of those rows is nondeterministic with respect to the nonordered columns. ...
Below we take a look at several examples of how to use the MySQL LIMIT clause to retrieve specific results, including date created, category IDs, and running queries on multiple columns. Using MySQL LIMIT 10 to find result sets by ‘date_created’ and ‘category_id” For example, if I do...