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...
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...
The ORDER BY clause contains a column or combination of columns that are guaranteed to be unique.See the example "Running multiple queries in a single transaction" in the Examples section later in this article.If consistent execution plans are important in your paging solution, consider using the...
ORDER BY score ASC 1. 2. 查询结果: 下面我们按照 score 升序,每页3条数据,来获取数据。 下面的sql依次为第1页、第2页、第3页、第4页、第5页的数据,如下: 查询第1页的语句: AI检测代码解析 SELECT * FROM test ORDER BY score ASC LIMIT 0,3 ...
TheORDER BYclause contains a column or combination of columns that are guaranteed to be unique. See the example "Running multiple queries in a single transaction" in the Examples section later in this article. If consistent execution plans are important in your paging solution, consider using the...
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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. ...
SELECT Measures.[Reseller Order Count] ON COLUMNS, Order( [Date].[Calendar].[Calendar Quarter].MEMBERS, Measures.[Reseller Order Count], DESC ) ON ROWS FROM [Adventure Works] 请注意,在此示例中,当 DESC标志更改为BDESC时,层次结构被破坏,并且返回日历季度列表而不考虑层次结构: ...