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Replace outdated doc, partially addressing #404.
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#Introduction
sqlpp11 is a library mainly for constructing queries and interpreting results. It does not know how to talk to a database on its own. It needs database connectors for that. Depending on the database you want to use, you can use an existing connector, for instance
# Introduction
* MySQL: https://github.com/rbock/sqlpp11-connector-mysql
* sqlite3: https://github.com/rbock/sqlpp11-connector-sqlite3
* PostgreSQL: https://github.com/matthijs/sqlpp11-connector-postgresql
* STL Container (highly experimental): https://github.com/rbock/sqlpp11-connector-stl
Using sqlpp11 requires of three logical parts:
1. The actual tables of a database are represented structs, usually generated by sql2cpp. These structs contain compile-time information about each colum such as name and data type.
2. The core library provides SQL as embedded language for C++. It allows you to write SQL statements for those tables and analyse results in a compile-time checked manner.
3. The connector library that allows you to connect to an actual database, send queries and obtain results.
Or you have to write your own connector. Don't worry, it is not that hard.
Three connector libraries are included in this repository:
* MySQL / MariaBD
* sqlite3 / SQLCipher
* PostgreSQL
If you want to use other databases, you would have to write your own connector. Don't worry, it is not that hard.
The api is documented [here](https://github.com/rbock/sqlpp11/blob/master/connector_api/connection.h).