你如何从mysql中选择每第n行
2021-11-20 00:00:00
mysql
我需要提取数据库中的一系列值来创建折线图.因为我不需要高分辨率,所以我想通过从数据库中选择每 5 行来重新采样数据.
I have a series of values in a database that I need to pull to create a line chart. Because i dont require high resolution I would like to resample the data by selecting every 5th row from the database.
推荐答案
SELECT *
FROM (
SELECT
@row := @row +1 AS rownum, [column name]
FROM (
SELECT @row :=0) r, [table name]
) ranked
WHERE rownum % [n] = 1
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