MySQL: unique field needs to be an index?(MySQL:唯一字段需要是索引吗?)

SQL Server UNIQUE constraint with duplicate NULLs(具有重复 NULL 的 SQL Server UNIQUE 约束)

Sql server function for displaying word frequency in a column(用于在列中显示词频的sql server函数)

mysql too many indexes?(mysql 索引太多?)

How to drop unique in MySQL?(如何在 MySQL 中删除唯一性?)

Why can#39;t I simply add an index that includes all columns?(为什么我不能简单地添加一个包含所有列的索引?)

Are foreign keys indexed automatically in SQL Server?(外键是否在 SQL Server 中自动编入索引?)

Force index use in Oracle(在 Oracle 中强制使用索引)

Cannot create index on view #39;View_Table_Name#39; because the view is not schema bound(无法在视图“View_Table_Name上创建索引，因为该视图未绑定架构)

Does it make sense to use an index that will have a low cardinality?(使用基数较低的索引有意义吗?)

How do I rename an Index in MySQL(如何重命名 MySQL 中的索引)

Mysql performance on 6 million row table(Mysql 在 600 万行表上的性能)

Slow bulk insert for table with many indexes(对具有许多索引的表进行慢速批量插入)

MySQL: how to index an quot;ORquot; clause(MySQL:如何索引“OR条款)

900 byte index size limit in character length(900 字节索引大小限制在字符长度)

Is there any point using MySQL quot;LIMIT 1quot; when querying on indexed/unique field?(使用 MySQL 的“LIMIT 1有什么意义吗?查询索引/唯一字段时?)

MySQL optimizing INSERT speed being slowed down because of indices(MySQL 优化 INSERT 速度因索引而变慢)

Optimizing MySQL LIKE #39;%string%#39; queries in innoDB(在 innoDB 中优化 MySQL LIKE %string% 查询)

T-SQL for finding Redundant Indexes(用于查找冗余索引的 T-SQL)

Oracle: function based index selective uniqueness(Oracle:基于函数的索引选择性唯一性)