MySql Query，選擇大於

Question

我有一個名為faq_questions的表，其結構如下：

id int not_null auto_increment,
question varchar(255),
sort_order int

我正在嘗試構建一個給定排序順序的查詢，選擇具有下一個最高排序順序的行。

例：

id  question                sort_order
1   'This is question 1'    10
2   'This is question 2'    9
3   'This is another'       8
4   'This is another one'   5
5   'This is yet another'   4

好吧，所以想象一下我傳入5表示已知的排序順序（id 4），我需要它返回id為3的行。由於不能保證sort_order是連續的，所以我不能只選擇known_sort_order + 1。

謝謝！

Answer 1

看起來太簡單了，但它看起來像你需要的：

SELECT id,question FROM `questions` 
WHERE `sort_order` > sort_order_variable
ORDER BY sort_order ASC 
LIMIT 1

Answer 2

SELECT * FROM table_name WHERE sort_order > 5 ORDER BY sort_order ASC LIMIT 1

Answer 3

你可以使用TOP或LIMIT來做到這一點：

SELECT TOP 1 * FROM faq_questions
WHERE sort_order > 5
ORDER BY sort_order ASC

但這並不像優雅或便攜

SELECT *  
FROM faq_questions AS f1  
LEFT JOIN faq_questions AS f2  
    ON f1.sort_order > f2.sort_order  
    AND f2.sort_order = 5  
LEFT JOIN faq_questions AS f3  
    ON f3.sort_order BETWEEN f1.sort_order AND f2.sort_order  
WHERE f3.id IS NULL

Answer 4

SELECT 
    id, question, sort_order
FROM faq_questions 
WHERE sort_order in 
(SELECT 
        MIN(sort_order) 
    FROM faq_questions 
    WHERE sort_order > ?);

這似乎有效