数据库问题

Are statistics automatically updated when a new index is created?(创建新索引时是否会自动更新统计信息?)

How sum with case conditional statement works in sql(带case条件语句的sum在sql中如何工作)

ORDER BY RAND() seems to be less than random(ORDER BY RAND() 似乎小于随机)

losing null values filtering sql query results using where(使用 where 过滤 sql 查询结果丢失空值)

Arithmetic overflow error converting IDENTITY to data type tinyint(将 IDENTITY 转换为数据类型 tinyint 的算术溢出错误)

How to copy data in identity column?(如何复制身份列中的数据?)

Conditional in MYSQL where clause(MYSQL where 子句中的条件)

Deadlock issue in SQL Server 2008 R2 (.Net 2.0 Application)(SQL Server 2008 R2(.Net 2.0 应用程序)中的死锁问题)

Create user that can only SEE one database, and only select from it?(创建只能看到一个数据库的用户，并且只能从中选择?)

Can not connect to local MySQL server thru Apps Script (JDBC)(无法通过应用程序脚本(JDBC)连接到本地MySQL服务器)

Get Root parent of child in Hierarchical table(在层次表中获取孩子的根父级)

MySQL user DB does not have password columns - Installing MySQL on OSX(MySQL 用户 DB 没有密码列 - 在 OSX 上安装 MySQL)

Conditional unique constraint with multiple fields in oracle db(oracle db中具有多个字段的条件唯一约束)

Where I can check user-define table type in SQL Server 2008 in SSMS? and how can I insert new column into it?(在哪里可以在SSMS中检查SQL Server 2008中的用户定义表类型？我怎样才能在其中插入新的列呢？)

Biased random in SQL?(SQL中的有偏随机?)