Error when trying to install app with mysql2 gem(尝试使用 mysql2 gem 安装应用程序时出错)

strftime error while switching my database from sqlite3 to mysql in Rails4(在 Rails4 中将我的数据库从 sqlite3 切换到 mysql 时出现 strftime 错误)

How can I import data from ASCII (ISO/IEC 8859-1) to my Rails/PGSQL database?(如何将数据从 ASCII (ISO/IEC 8859-1) 导入 Rails/PGSQL 数据库?)

How to turn off MySQL strict mode in Rails(如何在 Rails 中关闭 MySQL 严格模式)

Trying to update 640k rows in mySQL gets quot;Lost connection to MySQL server during queryquot;(尝试更新 mySQL 中的 640k 行会出现“查询期间与 MySQL 服务器的连接丢失)

Rails 4.0rc1 app not running due to missing sqlite3 gem(由于缺少 sqlite3 gem，Rails 4.0rc1 应用程序没有运行)

taps migration failing from sqlite to postgres rails4, ruby 1.9.3(从 sqlite 到 postgres rails4、ruby 1.9.3 的点击迁移失败)

MySQL listen notify equivalent(MySQL 监听通知等效)

How to access MySQL from a remote computer (not localhost)?(如何从远程计算机(不是本地主机)访问 MySQL?)

Mysql - selecting year from a unix timestamp(Mysql - 从 unix 时间戳中选择年份)

How to add results of two select commands in same query(如何在同一个查询中添加两个选择命令的结果)

ORA-01658: unable to create INITIAL extent for segment in tablespace TS_DATA(ORA-01658: 无法为表空间 TS_DATA 中的段创建初始范围)

SELECT id HAVING maximum count of id(SELECT id HAVING id 的最大计数)

MySQL Select First Day of Year and Month(MySQL 选择年和月的第一天)

Merging two rows to one while replacing null values(将两行合并为一行，同时替换空值)

SQLite: bind list of values to quot;WHERE col IN ( :PRM )quot;(SQLite:将值列表绑定到“WHERE col IN (:PRM)；)

Microsoft SQL Server insert from select query(Microsoft SQL Server 从选择查询插入)

Select one row without duplicate entries(选择没有重复条目的一行)

SELECT COUNT(*) ;(选择计数(*)；)

Mysql count occurrence by group(Mysql 按组计数出现次数)