Generate Random Key Sql Server
If you need a string of random digits up to 32 characters for test data or just need some junk text to fill a field, SQL Server's NEWID function makes this simple. NEWID is used to create a new GUID (globally unique identifier), and we can use that as a base to get a string of random characters. We would like to show you a description here but the site won’t allow us. Let's explore how to use the RAND function in SQL Server (Transact-SQL) to generate a random decimal number between two numbers (ie: range). For example, the following would generate a random decimal value between 1 and 10, not inclusive (random number would be greater than 1 and less than 10).
-->The Microsoft JDBC Driver for SQL Server supports the optional JDBC 3.0 APIs to retrieve automatically generated row identifiers. The main value of this feature is to provide a way to make IDENTITY values available to an application that is updating a database table without a requiring a query and a second round-trip to the server.
Because SQL Server doesn't support pseudo columns for identifiers, updates that have to use the auto-generated key feature must operate against a table that contains an IDENTITY column. SQL Server allows only a single IDENTITY column per table. The result set that is returned by getGeneratedKeys method of the SQLServerStatement class will have only one column, with the returned column name of GENERATED_KEYS. If generated keys are requested on a table that has no IDENTITY column, the JDBC driver will return a null result set.
As an example, create the following table in the sample database:
In the following example, an open connection to the sample database is passed in to the function, an SQL statement is constructed that will add data to the table, and then the statement is run and the IDENTITY column value is displayed.
See also
-->Returns a pseudo-random float value from 0 through 1, exclusive.
Syntax
Arguments
seed
Is an integer expression (tinyint, smallint, or int) that gives the seed value. If seed is not specified, the SQL Server Database Engine assigns a seed value at random. For a specified seed value, the result returned is always the same.
Return Types
float
Remarks
Repetitive calls of RAND() with the same seed value return the same results.
For one connection, if RAND() is called with a specified seed value, all subsequent calls of RAND() produce results based on the seeded RAND() call. For example, the following query will always return the same sequence of numbers.
Examples
The following example produces four different random numbers that are generated by the RAND function.