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# Database Abstraction Layer

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##### Resources

- Reference Manual
- User Guide
- The Data Dictionary
- ADOdb-xmlschema
- ADOdb Active Record
- Performance Monitoring
- Date/Time Library
- Session Management Library
- Unsupported Addons
- Coding Standards

##### Supported Databases

- Access
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##### Other

- Feature Comparison Matrix
- Connection Matrix
- Include File Guide

v5:reference:connection:createsequence

# createSequence

##### See Also

Feature Comparison Matrix

##### Syntax

    bool createSequence(
         optional string $sequenceName='adodbseq',
         optional int $startNumber
         )

## Description

The function `createSequence()` creates an auto-incrementing number device. If the database supports it, it uses native sequence handling routines, otherwise it emulates the functionality using a table and an auto-incrementing numbers.

Once created, numbers can retrieved using genId().

## Usage

    /*
     * Connection assumed
     */

    /*
     * Create a sequence called my_sequence, using default start of 1
     */
    $db->createSequence('my_sequence');

v5/reference/connection/createsequence.txt · Last modified: 2016/01/16 15:45 by mnewnham

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