<div>
1) get a description of all current tables <br />
2) determine the order in which tables need to be processes; First all tables that don't refer to other tables, <br />
&nbsp; &nbsp;Then tables that refer to already existing tables from previous step <br />
&nbsp; &nbsp; &nbsp;and repeat this until all tables are specified.<br />
3) create the data description for each of the tables for the Postgresql database (and take a note which conversions need to be done);<br />
4) create a script that connectes to both databases and copies all data (in the table order determined in step 2) with the conversion rules determined in step 3<br />
5) test the script built in step 4 on a separate database copy, if there are errors recheck/redo step 3 &amp;&nbsp;step 4. &nbsp; <br />
6) convert the production database to production postgresql, in case of errors what went differently wrong compared to step 5, redo step 3-5.....<br />
<br />
(use a copy of production data to not block any transaction there).
</div>


1) get a description of all current tables
2) determine the order in which tables need to be processes; First all tables that don't refer to other tables,
   Then tables that refer to already existing tables from previous step
     and repeat this until all tables are specified.
3) create the data description for each of the tables for the Postgresql database (and take a note which conversions need to be done);
4) create a script that connectes to both databases and copies all data (in the table order determined in step 2) with the conversion rules determined in step 3
5) test the script built in step 4 on a separate database copy, if there are errors recheck/redo step 3 & step 4.  
6) convert the production database to production postgresql, in case of errors what went differently wrong compared to step 5, redo step 3-5.....

(use a copy of production data to not block any transaction there).

<div>
<div class="content wysiwyg-content">
How to convert existing Sql server database to postgre database?
</div>
</div>


How to convert existing Sql server database to postgre database?

Databases are organized collections of data, most commonly accessed through management systems including schemas, tables, queries and processes that allow users to enter and manipulate the information or utilize it in other fashions, such as with web applications or for reporting purposes.

Databases

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

PostgreSQL is an object-relational database management system with an emphasis on extensibility and standards-compliance. As a database server, its primary function is to store data securely, supporting best practices, and to allow for retrieval at the request of other software applications. PostgreSQL implements the majority of the SQL2011 standard, is ACID-compliant and transactional using multiversion concurrency control (MVCC), and handles complex SQL queries using many indexing methods that are not available in other databases. It is cross-platform and runs on many operating systems including Linux, FreeBSD, OS X, Solaris, and Microsoft Windows.

PostgreSQL

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.