Unique Constraint vs Unique Index(唯一约束与唯一索引)

store users and pass in single table or separate table(存储用户并传入单表或单表)

MySQL datetime index is not working(MySQL 日期时间索引不起作用)

Best way to store a many-to-many relationship in MySQL?(在 MySQL 中存储多对多关系的最佳方式?)

how to pass a null value to a foreign key field?(如何将空值传递给外键字段?)

Datatype/structure to store timezone offset in MySQL(在 MySQL 中存储时区偏移的数据类型/结构)

What is the best way to enforce a #39;subset#39; relationship with integrity constraints(强制执行具有完整性约束的“子集关系的最佳方法是什么)

UNIQUE constraint controlled by a bit column(由位列控制的 UNIQUE 约束)

How to Maintain Foreign Key Constraint Across Different Databases?(如何维护跨数据库的外键约束?)

MySQL second auto increment field based on foreign key(MySQL基于外键的第二个自增字段)

MySQL: how to do row-level security (like Oracle#39;s Virtual Private Database)?(MySQL:如何做到行级安全(如 Oracle 的 Virtual Private Database)?)

Creating a flattened table/view of a hierarchically-defined set of data(创建分层定义的数据集的扁平表/视图)

Table relationship for subtypes(子类型的表关系)

Is using a Master Table for shared columns good practice for an entire database?(对整个数据库使用共享列的主表是一种很好的做法吗?)

Tables whose sole purpose is specify a subset of another table(唯一目的是指定另一个表的子集的表)

Good tool to visualise database schema?(可视化数据库架构的好工具?)

Database-wide unique-yet-simple identifiers in SQL Server(SQL Server 中数据库范围的唯一但简单的标识符)

SQL Server: how to constrain a table to contain a single row?(SQL Server:如何限制表包含单行?)

MySQL - One To One Relationship?(MySQL - 一对一的关系?)

How can I upgrade the sqlite3 package in Python 2.6?(如何在 Python 2.6 中升级 sqlite3 包?)