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You don't have to uninstall sql standard first. You can do in-place upgrade to enterprise edition. Just run the installer and you'll have option to upgrade to enterprise version.<br />
<a href="https://www.brentozar.com/archive/2014/08/sql-server-edition-change-standard-edition-enterprise-evaluation/" rel="ugc">https://www.brentozar.com/archive/2014/08/sql-server-edition-change-standard-edition-enterprise-evaluation/</a>
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Actaully this is QA server we are planning to uninstall existing License standard edition and install Enterprise Evaluation Edition.
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We are planning to uinstall existing Standard edition of SQL Server 2016 and install Enterprise eiditon for some testing purpose.<br />
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After unistalling and reinstalling SQL server ENT 2016, what is the procedure attach a databases?<br />
<br />
is it necessary to restore master databasae first?
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We are planning to uinstall existing Standard edition of SQL Server 2016 and install Enterprise eiditon for some testing purpose.

After unistalling and reinstalling SQL server ENT 2016, what is the procedure attach a databases?

is it necessary to restore master databasae first?

SQL Server 2016 Installation

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.

Microsoft SQL Server

Installation is the act of making a computer program program ready for execution. Because the process varies programs often come with a specialized program responsible for doing whatever is needed for their installation. Installation may be part of a larger software deployment process. Cross platform installer builders that produce installers for Windows, Mac OS X and Linux include InstallAnywhere, InstallBuilder and Install4J. Installers for Microsoft Windows include Windows Installer, InstallShield, and Wise Installation Studio; free installer-authoring tools include NSIS, IzPack, Clickteam, InnoSetup, InstallSimple and WiX. Mac OS X includes Installer, and also includes a separate software updating application.

Installation

SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.