I have seen references to changes in SQLite-net that supports multi-column unique constraints. I know it can be done directly with sqlite however I prefer to stay wit the sqlite-net methods of doing things. What is the Syntax to do multi-column unique. Single is [Unique] above the column desired to be unique.
C programming language is a machine-independent programming language that is mainly used to create many types of applications and operating systems such as Windows, and other complicated programs such as the Oracle database, Git, Python interpreter, and games and is considered a programming foundation in the process of ...
C is a general-purpose language that most programmers learn before moving on to more complex languages. From Unix and Windows to Tic Tac Toe and Photoshop, several of the most commonly used applications today have been built on C. It is easy to learn because: A simple syntax with only 32 keywords.
What is C? C is a general-purpose programming language created by Dennis Ritchie at the Bell Laboratories in 1972. It is a very popular language, despite being old. C is strongly associated with UNIX, as it was developed to write the UNIX operating system.
In the real sense it has no meaning or full form. It was developed by Dennis Ritchie and Ken Thompson at AT&T bell Lab. First, they used to call it as B language then later they made some improvement into it and renamed it as C and its superscript as C++ which was invented by Dr.
I have found the answer by reviewing the actual unit tests included in the project. It is base upon using the named parameters on the index attribute. For example:
[Indexed(Name = "ListingID", Order = 2, Unique = true)] public string ListingNumber { get; set; } [Indexed(Name = "ListingID", Order = 1, Unique = true)] public string ChannelCode { get; set; }
will create an index named ListingID over two fields that must be unique. It you do not want the unique attribute, remove it as a parameter. You must use the named parameters to make it work. Also all field in an index must have the same Unique value.
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