MySQL：按字段排序，在末尾放置空单元格
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MySQL: Order by field, placing empty cells at end
提问by BenM
I have a MySQL table which contains a number of products. What I want to do is sort the table by one particular column (most of the values begin with numbers for example: 1st, 2nd), etc. However, since some records do not have a value for this column, when I try to sort, the table automatically puts empty rows FIRST.
我有一个包含许多产品的 MySQL 表。我想要做的是按一个特定的列对表进行排序（大多数值以数字开头，例如：1st、2nd）等。但是，由于某些记录没有该列的值，当我尝试排序时，表自动将空行放在首位。
I am looking for a way to sort the row ASCENDING, but only insert blank records at the end of the sorted records, if that makes sense?
我正在寻找一种对行 ASCENDING 进行排序的方法，但只在排序记录的末尾插入空白记录，如果这有意义吗？
Any help would be most gratefully received!
任何帮助将不胜感激！
回答by Nicola Cossu
select * from table
order by if(field = '' or field is null,1,0),field
回答by Ahmad Vaqas Khan
This is one of the most effective method
这是最有效的方法之一
ASC Order
ASC 订单
SELECT * FROM user ORDER BY name IS NULL, name ASC
Expected Result:
预期结果：
+----+--------+------------+
| id | name | date_login |
+----+--------+------------+
| 3 | david | 2016-12-24 |
| 2 | john | NULL |
| 4 | zayne | 2017-03-02 |
| 1 | NULL | 2017-03-12 |
DESC Order
DESC 订单
SELECT * FROM user ORDER BY name IS NULL, name DESC
Expected Result:
预期结果：
+----+--------+------------+
| id | name | date_login |
+----+--------+------------+
| 4 | zayne | 2017-03-02 |
| 2 | john | NULL |
| 3 | david | 2016-12-24 |
| 1 | NULL | 2017-03-12 |
