SQL使用带有字母数字数据的数字排序对列（varchar（255））进行排序

Question

I am using SQL server(MySQL Ver 14.14 Distrib 5.7.21, for Linux (x86_64)). I want to sort data like this.

DocTyp-2649
DocTyp-2650
DocTyp-2651
DocTyp-2652
DocTyp-26036
DocTyp-26037
DocTyp-26038

my query is

SELECT doc_unique_id FROM docs ORDER BY doc_unique_id ASC

my result is

DocTyp-26036
DocTyp-26037
DocTyp-26038
DocTyp-2649
DocTyp-2650
DocTyp-2651
DocTyp-2652

what can u do?

Answer 1

Try this query

SELECT doc_unique_id 
FROM docs 
ORDER BY cast(replace(doc_unique_id, 'DocTyp-', '') as int)

Answer 2

You could explicitly sort the data by using substring() function (SQL Server) to get the numerical data

select * 
from table 
ORDER BY 
cast(substring(doc_unique_id, charindex('-', doc_unique_id)+1, len(doc_unique_id)) as int)

Answer 3

尝试这个：

select doc_unique_id from docs ORDER BY CAST(SUBSTRING_INDEX(doc_unique_id, '-', -1) AS UNSIGNED) ASC;

Answer 4

ORDER BY长度（doc_unique_id），doc_unique_id ASC