What is Solr and how does it function as a database? 

Solr is a search platform that is built on top of Apache Lucene. It provides a robust and scalable search solution that can be used to power search applications for websites and other applications. Solr is designed to function like a database, with a schema that defines fields and data types that can be indexed and searched. Documents are added to a Solr index and can be queried using the Solr query language. 

What kind of Query Language platform does Solr operate on? 

Solr is a NoSQL search platform that is built on top of Apache Lucene. It does not use a traditional RDBMS or BIDW platform for indexing and search. 

Solr was originally developed by CNET Networks in 2004 as an in-house search platform. It was open sourced in 2006 and became a top-level Apache project in 2007. Solr is now used by many large organizations, including eBay, Netflix, and the US Government. 

Can Solr be used for law enforcement or criminal record history information systems? 

Yes, Solr can be used for law enforcement or criminal record history information systems. It provides a robust and scalable search solution that can be used to power search applications for websites and other applications.

One potential drawback of using Solr is that it is a NoSQL search platform that is built on top of Apache Lucene. This means that it does not use a traditional RDBMS or BIDW platform for indexing and search. As a result, Solr may not be as familiar or easy to use for some users as a more traditional database. 

How to Delete Records From a Database in Solr 

To delete records from a Solr database, you can use the deleteByQuery() method. 

The following code deletes all records from the “books” database that match the query “title:The”: 

solr.deleteByQuery("books", "title:The")
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