composite-primary-key

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WHERE col1,col2 IN (...) [SQL subquery using composite primary key]

Given a table foo with a composite primary key (a,b), is there a legal syntax for writing a query such as:[详细]

2023-02-03 04:02 分类：问答
Problem with inserting into android sqlite3 table that has composite primary key

I have a table with a composite primary key and I am having trouble inserting. The code used to create the table is:[详细]

2023-01-27 15:22 分类：问答
MySql question with multi-field primary keys

I have a table with a primary key which is built from three 开发者_运维技巧columns. In an other table I would like to reference to them as one single column foreign key. How can this be resolved? Mayb[详细]

2023-01-26 06:10 分类：问答
How do you implement inheritance with tables that have multi-column/composite primary keys (JPA 1.0 @IdClass)?

Given the following tables: CREATE TABLE Employees ( first_name VARCHAR(50) NOT NULL, last_name VARCHAR(50) NOT NULL,[详细]

2023-01-26 00:36 分类：问答
Ruby error no such file to load -- composite_primary_keys

I\'m new to Rails but I need to use a composite primary key in my app running Ruby 1.9.2 and Rails 3.I am not able to get composite keys working properly in my Ruby on Rails app.I\'ve followed the dir[详细]

2023-01-25 18:57 分类：问答
How do you tell Hibernate that your entity class mappings are in JPA 1.0 syntax?

This is a follow开发者_JAVA百科-up to Limitation of JPA 1.0 using @IdClass with *nested* composite primary keys?[详细]

2023-01-23 01:39 分类：问答
Limitation of JPA 1.0 using @IdClass with *nested* composite primary keys?

Given the following example (departments - projects): A department has the following properties (composite primary key):[详细]

2023-01-22 11:01 分类：问答
JPA/Hibernate: What's better for composite primary keys, @IdClass or @EmbeddedId implementations and why? [duplicate]

This question already has answers here: 开发者_运维问答 Which annotation should I use: @IdClass or @EmbeddedId[详细]

2023-01-21 20:44 分类：问答
Foreign key relationship with composite primary keys in SQL Server 2005

I have two tables Table1( FileID, BundledFileID, Domain) and Table2( FileID,开发者_如何学C FileType, FileName)[详细]

2023-01-20 18:33 分类：问答
Django - Multiple columns primary key

I would like to implement multicolumns primary keys in django. I\'ve tried to implement an AutoSlugField() which concatenate my columns values(foreignkey/dates) ...[详细]

2023-01-15 08:40 分类：问答