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Same way as in any other ANSI SQL database.<br />
What is your exact query and from which database system?
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Same way as in any other ANSI SQL database.
What is your exact query and from which database system?

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I want to do a crosstab query in PostgreSQL. Can you please describe how to do this in postgreSQL?
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I want to do a crosstab query in PostgreSQL. Can you please describe how to do this in postgreSQL?

Doing a crosstab query in postgreSQL

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.