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POLoading Multiple Tables using SSIS keeping foreign key relationships
 

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  1. POLoading Multiple Tables using SSIS keeping foreign key relationships
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    <p>I am trying to load data from a single file (with million+ records) into multiple tables on SQL Server using SSIS while maintaining the relationships defined in the file. </p> <p>To better elaborate with an example, lets assume I am trying to load a file containing employee name, the offices they have occupied in the past and their Job title history separated by a tab.</p> <p>File:</p> <pre><code>EmployeeName&lt;tab&gt;OfficeHistory&lt;tab&gt;JobLevelHistory John Smith&lt;tab&gt;501&lt;tab&gt;Engineer John Smith&lt;tab&gt;601&lt;tab&gt;Senior Engineer John Smith&lt;tab&gt;701&lt;tab&gt;Manager Alex Button&lt;tab&gt;601&lt;tab&gt;Senior Assistant Alex Button&lt;tab&gt;454&lt;tab&gt;Manager </code></pre> <p>If my Office database schema has the following tables:</p> <pre><code>Employee (nId, name) Office (nId, number) JobTitle (nId, titleName) Employee2Office (nEmpID, nOfficeId) Employee2JobTitle (nEmpId, nJobTitleID) </code></pre> <p>How can I use SSIS to load the file into the schema above Auto-Generating IDs for Employee, Office and JobTitle and maintaining the relationship between the employee and offices, and employee and Job Titles?</p> <p>So in this case. the tables should look like:</p> <pre><code>Employee 1 John Smith 2 Alex Button Office 1 501 2 601 3 701 4 454 JobTitle 1 Engineer 2 Senior Engineer 3 Manager 4 Senior Assistant Employee2Office 1 1 1 2 1 3 2 2 2 4 Employee2JobTitle 1 1 1 2 1 3 2 4 2 3 </code></pre> <p>I am a newbie to SSIS and have not played around with auto-generating IDs and establishing foreign key relationships while executing a Data Flow Task. Any pointers would be appreciated.</p> <p>Thanks!</p>
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    1. COMy first question is how will your import know if two records with the same name are the same person or different people? Since names are not unique, you have to have a way in the file to know which is which.
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    2. COGood question - Lets say we assume for this scenario, the employee name is unique. So there will be only one John Smith in this organization.
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