primary-key

相关标签：javascript jquery android 多少钱 iPhone

Does MySQL slow down with really high primary key values?

If the values of the primary key in my table range from 200,000,000 to 200,000,100 Will queries be much slower than if the values were 1000 to 1100?开发者_开发百科No. Unless you\'re using char/varcha[详细]

2023-04-12 18:19 分类：问答
insert column in with same value as primary key

is possible in Rails, to insert row and to assign value of id to specific column, e.g. if i have table which have ID and LINK columns where LINK is link to same table:[详细]

2023-04-11 09:26 分类：问答
MySQL: How to find where a specific primary key is used as a foreign key in other tables?

I\'m working on implementing a function to prevent removal of certain elements in a database (through the front end) if they have other items associated with them in other tables. Otherwise those othe[详细]

2023-04-11 07:43 分类：问答
define PK before or after LOAD DATA INFILE

I neet to load >1 billion rows into empty MyISAM table. I\'m sure all entries in the file are unique. Is it better to load the data into table with PK defined, or add PK later?[详细]

2023-04-11 00:13 分类：问答
SQL 2008 Composite Primary Key With One Part of the Key Auto Increment

Simple table with composite primary key. PK1 smallint, PK2 smallint auto increment, strValue varchar(20) not null.[详细]

2023-04-10 14:09 分类：问答
Foreign Key Used in Composite Primary Key

Is it possible to use a composite foreign key as a piece of a table\'s composite primary key? For instance, let\'s say I have two tables:[详细]

2023-04-10 08:43 分类：问答
JPA: @JoinTable - Both columns are Primary Keys.. How do I stop that?

This is my annotation I use to generate my Join Table. @OneToMany(cascade = CascadeType.ALL) @JoinTable(name = \"service_operations\",[详细]

2023-04-09 11:30 分类：问答
case-insensitive key in xsd

I have an XSD embedded into an XML like this: <Replacements> <xs:schema elementFormDefault=\"qualified\" xmlns:xs=\"http://www.w3.org/2001/XMLSchema\">[详细]

2023-04-08 21:41 分类：问答
Unable to update the EntitySet - because it has a DefiningQuery and no <UpdateFunction> element exist

I am using Entity Framework 1 with .net 3.5. I am doing something simple like this: var roomDetails = context.Rooms.ToList();[详细]

2023-04-08 19:48 分类：问答
Hibernate & postgreSQL with Grails

There is an easy way to set hibernate to use different primary key ids for each table wi开发者_高级运维th postgres?[详细]

2023-04-08 18:37 分类：问答