Microsoft SQL Server Integration Services (SSIS) is a component of the

Microsoft SQL Server Microsoft SQL Server is a proprietary relational database management system developed by Microsoft using Structured Query Language (SQL, often pronounced "sequel"). As a database server, it is a software product with the primary function of ...

database software that can be used to perform a broad range of

data migration Data migration is the process of selecting, preparing, extracting, and transforming data and permanently transferring it from one computer storage system to another. Additionally, the validation of migrated data for completeness and the decommi ...

tasks. SSIS is a platform for

data integration Data integration refers to the process of combining, sharing, or synchronizing data from multiple sources to provide users with a unified view. There are a wide range of possible applications for data integration, from commercial (such as when a ...

and workflow applications. It features a

data warehousing In computing, a data warehouse (DW or DWH), also known as an enterprise data warehouse (EDW), is a system used for Business intelligence, reporting and data analysis and is a core component of business intelligence. Data warehouses are central Re ...

tool used for data extraction, transformation, and loading (ETL). The tool may also be used to automate maintenance of SQL Server databases and updates to multidimensional cube data. First released with Microsoft SQL Server 2005, SSIS replaced

Data Transformation Services Data Transformation Services (DTS) is a Microsoft database tool with a set of objects and utilities to allow the automation of extract, transform and load operations to or from a database. The objects are DTS packages and their components, and th ...

, which had been a feature of SQL Server since Version 7.0. Unlike DTS, which was included in all versions, SSIS is only available in the "Standard", "Business Intelligence" and "Enterprise" editions. With Microsoft "Visual Studio Dev Essentials" it is now possible to use SSIS with Visual Studio 2017 free of cost so long as it is for development and learning purposes only.

Features

The SSIS Import/Export Wizard lets the user create packages that move data from a single data source to a destination with no transformations. The Wizard can quickly move data from a variety of source types to a variety of destination types, including text files and other SQL Server instances. Developers tasked with creating or maintaining SSIS packages use a visual development tool based on

Microsoft Visual Studio Visual Studio is an integrated development environment (IDE) developed by Microsoft. It is used to develop computer programs including websites, web apps, web services and mobile apps. Visual Studio uses Microsoft software development platforms ...

called the SQL Server Business Intelligence Development Studio (BIDS). It allows users to edit SSIS packages using a drag-and-drop user interface. A scripting environment for writing programming code is also available in the tool. A package holds a variety of elements that define a workflow. Upon package execution, the tool provides color-coded real-time monitoring. (Note: In more recent versions MS SQL Server, BIDS has been replaced with "SQL Server Data Tools - Business Intelligence" (SSDT-BI).) ; Connections: A connection includes the information necessary to connect to a particular data source. Tasks can reference the connection by its name, allowing the details of the connection to be changed or configured at run time. ; Event handlers: A workflow can be designed for a number of events in the different scopes where they might occur. In this way, tasks may be executed in response to happenings within the package — such as cleaning up after errors. ; Parameters (SQL Server 2012 Integration Services): Parameters allow you to assign values to properties within packages at the time of package execution. You can have project parameters and package parameters. In general, if you are deploying a package using the package deployment model, you should use configurations instead of parameters. ; Precedence constraints: Tasks are linked by precedence constraints. The precedence constraint preceding a particular task must be met before that task executes. The run time supports executing tasks in parallel, if their precedence constraints so allow. Constraints may otherwise allow different paths of execution depending on the success or failure of other tasks. Together with the tasks, precedence constraints comprise the workflow of the package. ; Tasks: A task is an atomic work unit that performs some action. There are a couple of dozen tasks that ship in the box, ranging from the file system task (that can copy or move files) to the data transformation task. The data transformation task actually copies data; it implements the ETL features of the product ; Variables: Tasks may reference variables to store results, make decisions, or affect their configuration. ; Streamlined Data Integration: SSIS offers a visual interface and pre-built components to simplify the process of extracting data from various sources, transforming it, and loading it into target destinations. This reduces development time and effort compared to writing custom code. A package may be saved to a file or to a store with a hierarchical namespace within a SQL Server instance. In either case, the package content is persisted in

XML Extensible Markup Language (XML) is a markup language and file format for storing, transmitting, and reconstructing data. It defines a set of rules for encoding electronic document, documents in a format that is both human-readable and Machine-r ...

. Once completed, the designer also allows the user to start the package's execution. Once started, the package may be readily debugged or monitored.

Features of the data flow task

SSIS provides the following built-in transformations: * Aggregation * Audit * Cache transform * Copy/Map * Data conversion * Data mining model training * Data mining query * Dimension processing * Derived column * Export and import column * For loop container * Foreach loop container * ( Fuzzy) lookup * Fuzzy grouping * OLE DB command * Partition processing * Percentage sampling *

Pivot Pivot may refer to: *Pivot, the point of rotation in a lever system *More generally, the center point of any rotational system *Pivot joint, a kind of joint between bones in the body *Pivot turn, a dance move Companies *Incitec Pivot, an Austra ...

* Unpivot * Row count * Row sampling * Row sampling transformation * Script component *

Slowly changing dimension In data management and data warehousing, a slowly changing dimension (SCD) is a dimension that stores data which, while generally stable, may change over time, often in an unpredictable manner. This contrasts with a rapidly changing dimension, su ...

* Term extraction * Term Lookup The conditional split transformation is used to conditionally route rows to other transformation objects based on a particular condition. It is similar to the " if … else" construct in the C language.

Other included tools

Aside from the Import/Export Wizard and the designer, the product includes a few other notable tools. DTEXEC executes a package from the command line wherever it may be stored. Before running the package, the tool may be instructed to apply configuration information, which will allow the same package to be reused with slightly different parameters, including different connection strings for its endpoints. DTUTIL provides the ability to manage packages from the

command prompt A command-line interface (CLI) is a means of interacting with software via commands each formatted as a line of text. Command-line interfaces emerged in the mid-1960s, on computer terminals, as an interactive and more user-friendly alternativ ...

. The tool can copy or move a package from a file into the server store, or back out again. Among a few other sundry functions, it can be used to delete, rename, encrypt, or decrypt packages. The Bulk Copy Program (BCP), is a command-line tool used to import or export data against a

, or Sybase database.

Extensibility and programmability

Users may write code to define their own connection objects, log providers, transforms, and tasks. SSIS features a programmable object model that allows developers to write their own hosts for package execution. Such a host can respond to events, start and stop packages, and so on. The object model also allows developers to create, store, and load packages, as well as create, destroy, and modify any of the contained objects. Within limits, SSIS packages can load and call CLI assembly DLLs, providing access to virtually any kind of operation permissible by the .NET CLR. SSIS can be used on all SQL Server

2005 2005 was designated as the International Year for Sport and Physical Education and the International Year of Microcredit. The beginning of 2005 also marked the end of the International Decade of the World's Indigenous Peoples, Internationa ...

2008 2008 was designated as: *International Year of Languages *International Year of Planet Earth *International Year of the Potato *International Year of Sanitation The Great Recession, a worldwide recession which began in 2007, continued throu ...

, 2008 R2,

2012 2012 was designated as: *International Year of Cooperatives *International Year of Sustainable Energy for All Events January *January 4 – The Cicada 3301 internet hunt begins. * January 12 – Peaceful protests begin in the R ...

2014 The year 2014 was marked by the surge of the Western African Ebola epidemic, West African Ebola epidemic, which began in 2013, becoming the List of Ebola outbreaks, most widespread outbreak of the Ebola, Ebola virus in human history, resul ...

and

2016 2016 was designated as: * International Year of Pulses by the sixty-eighth session of the United Nations General Assembly. * International Year of Global Understanding (IYGU) by the International Council for Science (ICSU), the Internationa ...

editions except Express and Workgroup.

References

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External links