选择中是否存在星号会排除其他列? [英] does the existence of an asterisk in a select exclude other columns?

问题描述

这个问题全都与懒惰有关...我想做这样的事情:

This question is all about laziness... I'd like to do something like this:

select some_func(some_col), * from my_table

这样我就不必这样做:

select some_func(some_col), col_1, col_2... col_ad_infinitum from my_table

有什么办法可以使第一个查询正常工作?这是我在运行它时遇到的错误:

Is there any way to make the first query work? This is the error I get when I run it:

ERROR 1064 (42000) at line 1: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '* from my_table' at line 1

推荐答案

您的意思是在MySQL中您的第一个查询:

Do you mean that in MySQL your first query:

SELECT some_func(some_col), * 
FROM my_table

会产生此错误吗?:

错误代码:1064.您的SQL语法有错误；请参见.检查与您的MySQL服务器版本相对应的手册以获取正确的语法，以在第1行的"*"附近使用

Error Code: 1064. You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '*' at line 1

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您可以将代码更改为(这不会导致错误！):

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You can change your code into (this results in no errors!):

SELECT *, some_func(some_col) 
FROM my_table

或添加到此，如果您想首先拥有计算列:

or into this, if you want to have the calculated columns first:

SELECT some_func(some_col), t.* 
FROM my_table AS t

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