sql sequence example

If I were Cristiano Ronaldo . Brief introduction of the simple use method of ORACLE PL/SQL sequence (sequence)Sequence is widely used in Oracle, meaning the serial number, which automatically increases the specified variable, such as 1 or 2

I. INTRODUCTION of sequenceThe sequence object is the most familiar database object for Oracle users, and this object is finally visible to SQL SERVER2012. Sequence is a new feature introduced by SQL Server2012. This feature allows database-level

Http://database.51cto.com/art/201108/280742.htm In the Oracle database , what is a sequence ? What it is used for. A sequence (SEQUENCE) is actually a serial number generator that can automatically generate serial numbers for rows in a table,

Http://allchange.blog.sohu.com/156456875.htmlSIDE EFFECT (side effects) and sequence points (sequence point) sharingWhen the execution sequence runs to certain specific areas called sequential points, all the side effects that were previously

In an Oracle database, the purpose of a sequence is to generate a table's primary key value, to be referenced in an INSERT statement, to check the current value through a query, or to increment the sequence to the next value. In this article we

  The first of the three major paradigms of database design is that the independent table structure must have a unique primary key to identify the table data. in the past, Microsoft's SQL Server (duo version) platform. manually encode the primary

Two ways to generate a sequence of numbersIn DB2, you can automatically generate a sequence of numbers in two ways: Define a column with an IDENTITY attribute. Creates a SEQUENCE object. IDENTITY Column When you define a table's column with the

Sequence is a sequence of numbers automatically added by a database system in accordance with certain rules. This sequence is generally used as the surrogate primary key (because it is not duplicated) and has no other meaning.Sequence is the

A sequence is a scenario object that Oracle 9i provides to automatically generate data according to set rules. Some fields require this feature in the structure of some data tables. For example, for a student data table of the key field, users can

The first three paradigm of database design is that the independent table structure must have a unique primary key to identify the table data.SQL Server (duoOn the platform. Manually encode the primary key in the table and set it as an