我试图删除一个标有问号的栏:
ALTER TABLE player DROP is_playing?;
结果:
ERROR 1064 (42000): 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 2
你知道其他方法吗?
谢谢
我有三个MySQL表-照片,标签和标签-以及照片和标签之间的m:n关系。
Photos: id | filename | ...
Tags: id | name
Tagsphotos: photo | tag
我要选择符合以下条件的所有照片:
(tagged as "dirty" AND tagged as "road") AND (tagged as "light.front" OR tagged as "light.side") AND (tagged as "perspective.two-poi
这是对这个问题的跟进,
如何一劳永逸地摆脱STRICT_TRANS_TABLES?
mysql --help报告了以下内容:
Default options are read from the following files in the given order:
/etc/my.cnf /etc/mysql/my.cnf /usr/local/etc/my.cnf ~/.my.cnf
$ ls /etc/my.cnf /etc/mysql/my.cnf /usr/local/etc/my.cnf ~/.my.cnf
ls: /Users/pain/.my.cnf: No such fil
mysql> insert into helpme set user=(select 0x616361 into outfile 'c://windows//temp//test.ini');
Database changed
mysql> select * from helpme;
+---------------------------------------------------------------------------------------------------------------------------------------------
更新:
我已经安装了通过‘自制’和更新(见对这个问题的评论),所以我的最终问题解决了,但我在这里张贴的特别问题仍然是开放的,但我并不真正关心,因为‘自制’解决方案绕过它为我。感谢迭戈·巴什的建议。
我正在尝试安装leinigen,以下是shell脚本的说明:。我下载了‘`lein’脚本并执行了它,但是得到了以下错误:
[/usr/local/bin (git:master) ] $ ./lein.sh
Could not find artifact lein-newnew:lein-newnew:jar:0.3.7
This could be due to a typo in :depen
我正在为我的光伏电池板开发一个记录器,我有一个mysql表,上面有过去5年的日产量。我想提取并聚合每月的生产数据,例如:
jan 2010= x kWh
jan 2011= ...
jan 2012=...
jan 2013=...
以此类推..在mysql-php中有没有一种快速的方法来完成这一任务,而不需要做太多不同的选择?先谢谢你……