在每组的2行之间进行选择

ws51t4hk 于 2021-06-20 发布在 Mysql

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-- phpMyAdmin SQL Dump
-- version 4.7.9
-- https://www.phpmyadmin.net/
--
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-- Server version: 10.1.31-MariaDB
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SET SQL_MODE = "NO_AUTO_VALUE_ON_ZERO";
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START TRANSACTION;
SET time_zone = "+00:00";
/*!40101 SET @OLD_CHARACTER_SET_CLIENT=@@CHARACTER_SET_CLIENT */;
/*!40101 SET @OLD_CHARACTER_SET_RESULTS=@@CHARACTER_SET_RESULTS */;
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/*!40101 SET NAMES utf8mb4 */;
--
-- Database: `items`
--
-- --------------------------------------------------------
--
-- Table structure for table `tests`
--
CREATE TABLE `tests` (
  `ID` int(4) NOT NULL,
  `SID` int(4) NOT NULL,
  `VID` int(4) NOT NULL,
  `Text` varchar(20) NOT NULL
) ENGINE=MyISAM DEFAULT CHARSET=utf8;
--
-- Indexes for dumped tables
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--
-- Indexes for table `tests`
--
ALTER TABLE `tests`
  ADD PRIMARY KEY (`ID`);
--
-- AUTO_INCREMENT for dumped tables
--
--
-- AUTO_INCREMENT for table `tests`
--
ALTER TABLE `tests`
  MODIFY `ID` int(4) NOT NULL AUTO_INCREMENT;
COMMIT;
/*!40101 SET CHARACTER_SET_CLIENT=@OLD_CHARACTER_SET_CLIENT */;
/*!40101 SET CHARACTER_SET_RESULTS=@OLD_CHARACTER_SET_RESULTS */;
/*!40101 SET COLLATION_CONNECTION=@OLD_COLLATION_CONNECTION */;

我知道了，但我不知道怎么把它们搭配起来：
在两行之间选择：

SELECT
    MAX(`VID`)-3 AS max1,
    MAX(`VID`)-2 AS max2
FROM `tests`
GROUP BY `SID`

返回行的值：

SELECT *
FROM `tests`
WHERE `VID`>='max1' AND `VID`<='max2'
ORDER BY `SID` ASC, `VID` ASC

结果应该是这样的：


**Group:1**
test - 3
test - 4
**Group:2**
test - 283
test - 284
**Group:3**
test - 197
test - 198
**Group:4**
test - 173
test - 174
**Group:5**
test - 117
test - 118
**Group:6**
test - 162
test - 163
**Group:7**
test - 203
test - 204
**Group:8**
test - 72
test - 73
**Group:9**
test - 126
test - 127
**Group:10**
test - 106
test - 107

sql mysql php Database myisam

来源：https://stackoverflow.com/questions/51670123/select-between-2-rows-of-each-group

1条答案

按热度按时间

oaxa6hgo1#

您可以使用 Package 在子查询中的聚合联接表：

SELECT t.*
      FROM tests t
      JOIN (
                SELECT SID
                     , MAX(VID)-3 AS max1
                     , MAX(VID)-2 AS max2
                  FROM tests
              GROUP BY SID
           ) tagg
        ON tagg.SID = t.SID
     WHERE t.VID >= tagg.max1
       AND t.VID <= tagg.max2
  ORDER BY t.SID
         , t.VID
         ;

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在每组的2行之间进行选择

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