Well the question is self-explanatory. One more thing woul开发者_如何学JAVAd be, if it is a security risk then please provide an example of what the user could do. In this case the primary key would b
I am trying to implement some localization in my database. It looks something like this (prefixes only for clarification)
For a dat开发者_如何学编程abase I\'m building, I\'ve decided to use natural numbers as the primary key. I\'m aware of the advantages that GUID\'s allow, but looking at the data, the bulk of row\'s dat
I have a table that needs to be given a new prim开发者_运维百科ary key, as my predecesor used a varchar(8) row as the primary key, and we are having problems with it now.I know how to add the primary
I have the following table: CREATE TABLE [dbo].[Accounts1]( [AccountId] [nvarchar](50) NULL, [ExpiryDate] [nvarchar](50) NULL
When 开发者_运维知识库should I use a primary key or an index? What are their differences and which is the best?Basically, a primary key is (at the implementation level) a special kind of index. Spec
I am trying to alter a table with adding a new column setting it as auto increment and with a key. The table alre开发者_JAVA技巧ady has one key and this one will be an addition. The error I get is th
Is it possible to maintain relationship bet开发者_JAVA技巧ween two tables without primary key and foreign key
How to identify composite primary key in any Mysql Database table? or EDIT 2 what sql query should be used to
I have 2 tables each using other\'s primary key as a foreign key. The primary keys for both are set to auto_increment.
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