如何在限制语句中使用用户定义的变量？
How to use User-Defined Variables in the limit statement?
我想要一个通用格式的分页查询，而不是硬编码，方法是：
set @pageSize = 10; set @pageIndex = 2;
select * from city LIMIT (@pageIndex-1)*@pageSize, @pageSize;
但是 mysql 告诉我：
[Err] 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 '(@pageIndex-1)*@pageSize, @pageSize' at line 1
这有什么问题？
您不能将用户定义的变量与 LIMIT 一起使用。
MySQL Doc says "User variables may be used in most contexts where
expressions are permitted. This does not currently include contexts
that explicitly require a literal value, such as in the LIMIT clause
of a SELECT statement, or the IGNORE N LINES clause of a LOAD DATA
statement"
但是您可以使用 'user defined function' 或 'stored procedure' 或 [=21= 来实现类似的功能].
我想要一个通用格式的分页查询，而不是硬编码，方法是：
set @pageSize = 10; set @pageIndex = 2;
select * from city LIMIT (@pageIndex-1)*@pageSize, @pageSize;
但是 mysql 告诉我：
[Err] 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 '(@pageIndex-1)*@pageSize, @pageSize' at line 1
这有什么问题？
您不能将用户定义的变量与 LIMIT 一起使用。
MySQL Doc says "User variables may be used in most contexts where expressions are permitted. This does not currently include contexts that explicitly require a literal value, such as in the LIMIT clause of a SELECT statement, or the IGNORE N LINES clause of a LOAD DATA statement"
但是您可以使用 'user defined function' 或 'stored procedure' 或 [=21= 来实现类似的功能].