使用 ORDER BY 子句查询并在结果末尾分别发送某些行

Question

考虑到我想查询单个 table 而这个 table 有这个 structure 和 data

price | weight
 100      0
 200     10
 500      0
 300     10

我想应用 ORDER BY price DESC 但 我还想要 weight = 10 的结果在结果的末尾（这些结果也应用 ORDER BY price DESC）。

Results Query A         WHERE weight <> 10
----------------
price | weight
100       0
500       0

Results Query B         WHERE weight = 10
----------------
price | weight
200       10
300       10

我想过使用 UNION 但我无法实现我想要的:

EXPECTED RESULT      <= order by price DESC
----------------
price | weight
500       0
100       0
300      10      <=
200      10      <= but maintaining rows with weight 10 at the end of the results

你会怎么做？提前致谢

Answer 1

如果您先按布尔表达式 weight = 10 排序，所有此类行将放在结果集的底部：

ORDER BY weight = 10,
         price DESC

因为 weight = 10 被评估为 true 的 1 和 false 的 0。

使用 ORDER BY 子句查询并在结果末尾分别发送某些行

Query with ORDER BY clause and sending certain rows at the end of the results separately

mysql

sql

union

sql-order-by