数据库问题
How to turn off MySQL strict mode in Rails(如何在 Rails 中关闭 MySQL 严格模式)
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?)
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)
Error when trying to install app with mysql2 gem(尝试使用 mysql2 gem 安装应用程序时出错)
SELECT CASE WHEN THEN (SELECT)(选择案例时(选择))
Does MySQL quot;SELECT LIMIT 1quot; with multiple records select first record from the top?(MySQL是否“选择限制1?有多条记录从顶部选择第一条记录?)
MySQL error: Unknown column in #39;where clause#39;(MySQL 错误:“where 子句中的未知列)
Select one row without duplicate entries(选择没有重复条目的一行)
Microsoft SQL Server insert from select query(Microsoft SQL Server 从选择查询插入)
SQLite: bind list of values to quot;WHERE col IN ( :PRM )quot;(SQLite:将值列表绑定到“WHERE col IN (:PRM)；)
Merging two rows to one while replacing null values(将两行合并为一行，同时替换空值)
MySQL Select First Day of Year and Month(MySQL 选择年和月的第一天)
