Given a table foo with a composite primary key (a,b), is there a legal syntax for writing a query such as:
I have a table with a composite primary key and I am having trouble inserting. The code used to create the table is:
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
Given the following tables: CREATE TABLE Employees ( first_name VARCHAR(50) NOT NULL, last_name VARCHAR(50) NOT NULL,
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
This is a follow开发者_JAVA百科-up to 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):
This question already has answers here: 开发者_运维问答 Which annotation should I use: @IdClass or @EmbeddedId
I have two tables Table1( FileID, BundledFileID, Domain) and Table2( FileID,开发者_如何学C FileType, FileName)
I would like to implement multicolumns primary keys in django. I\'ve tried to implement an AutoSlugField() which concatenate my columns values(foreignkey/dates) ...
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