mysql - 我的 MySql 查询有什么问题

Question

SELECT WEEK(STR_TO_DATE( products_options_values, '%m-%d-%Y' ),1) as order_week,
        YEAR(STR_TO_DATE( products_options_values, '%m-%d-%Y' ),1) as order_year
FROM orders_products_attributes

如果只是一周，我没有收到任何错误，但是一旦我尝试选择年份，它就会抛出

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 '1) as order_year FROM orders_products_attributes'...

我究竟做错了什么？

Answer 1

代替

YEAR(STR_TO_DATE( products_options_values, '%m-%d-%Y' ),1)

和

YEAR(STR_TO_DATE( products_options_values, '%m-%d-%Y' ))

该YEAR()函数没有第二个参数。或者你可以做

STR_TO_DATE( products_options_values, '%Y' )

Answer 2

使用这个 sql

SELECT WEEK(STR_TO_DATE( products_options_values, '%m-%d-%Y' ),1) as order_week, 
       YEAR(STR_TO_DATE( products_options_values, '%m-%d-%Y' )) as order_year
FROM orders_products_attributes

进一步阅读 http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html http://dev.mysql.com/doc/refman/5.5/en/date- and-time-functions.html#function_year

Answer 3

方法使用不当YEAR()。第二个参数不应该在那里。试试这个：

SELECT WEEK(STR_TO_DATE( products_options_values, '%m-%d-%Y' ),1) 
as order_week, 
YEAR(STR_TO_DATE( products_options_values, '%m-%d-%Y' )) as order_year
FROM orders_products_attributes