SQL Structured Query Language) is a domain-specific language used in programming and designed for managing data held in a relational database management system (RDBMS), or for stream processing in a relational data stream management system (RDSMS).
It is particularly useful in handling structured data, i.e. data incorporating relations among entities and variables.
SQL offers two main advantages over older read-write APIs such as ISAM or VSAM. Firstly, it introduced the concept of accessing many records with one single command.
Secondly, it eliminates the need to specify how to reach a record, e.g. with or without an index.
You can read more about SQL at https://en.wikipedia.org/wiki/SQL
In this short blog, I will show you how to delete the history in Umbraco 8 using SQL. Useful if you do not want the client to see what changes you have made to the CMS