Question

SELECT * FROM table WHERE product like '%abc%' OR product like '%cde%'

是否可以使用

显示所有产品

both 'abc' and 'cde' first

然后带

的产品

either 'abc' or 'cde'

Answer 1

ORDER BY一个case表达式，如果abd和cde都返回1，否则为2.

SELECT * 
FROM table
WHERE product like '%abc%' OR product like '%cde%'
ORDER BY case when product like '%abc%' AND product like '%cde%' then 1
              else 2
         end

Answer 2

尝试在ORDER BY子句中使用相关查询：

SELECT t.* 
FROM table t
WHERE product like '%abc%' OR product like '%cde%'
ORDER BY (SELECT COUNT(DISTINCT product) FROM table s
          WHERE t.<Relation> = s.<Relation>
           AND s.product like '%abc%' OR s.product like '%cde%') DESC

将<Relation>替换为表格键。

Answer 3

对于精致的订购：

SELECT * FROM table 
WHERE product like '%abc%' OR product like '%cde%'
ORDER BY 
    CASE
        /* First show products with 'abc' AND 'cde'... */
        WHEN product LIKE '%abc%' AND product LIKE '%cde%' THEN 1
        /* ...2nd products with with 'abc' */
        WHEN product LIKE '%abc%' THEN 2 
        /* ...and finally products with with 'cde' */
        WHEN product LIKE '%cde%' THEN 3 
        ELSE 4 /* not actually necessary in this case */
    END

如何选择具有指定值的列，并使用指定值的出现次数对它们进行排序

3 个答案: