Lazarus database programming tutorial

  • How to work with database SQL?

    SQL database or relational database is a collection of highly structured tables, wherein each row reflects a data entity, and every column defines a specific information field.
    Relational databases are built using the structured query language (SQL) to create, store, update, and retrieve data..

  • What is SQLDB?

    SQLite is used to develop embedded software for devices like televisions, cell phones, cameras, etc.
    It can manage low to medium-traffic HTTP requests.
    SQLite can change files into smaller size archives with lesser metadata.
    SQLite is used as a temporary dataset to get processed with some data within an application..

  • What language is Lazarus?

    Lazarus is a free, cross-platform, integrated development environment (IDE) for rapid application development (RAD) using the Free Pascal compiler.
    Its goal is to provide an easy-to-use development environment for programmers developing with the Object Pascal language, which is as close as possible to Delphi..

  • SQL database or relational database is a collection of highly structured tables, wherein each row reflects a data entity, and every column defines a specific information field.
    Relational databases are built using the structured query language (SQL) to create, store, update, and retrieve data.

Does FPC/Lazarus support SQLite?

FPC/Lazarus offers the built-in SQLDB components that include:

  1. support for SQLite databases ( TSQLite3Connection) from the SQLdb tab of the Component Palette
  2. which allow you to e
g. create GUIs with database components such as:TDBGrids.
,

How do I access PDX files from Lazarus?

To access this files from Lazarus we have these options:

  1. TParadox:
  2. Install package "lazparadox 0
0" included in the standard distribution.
When you install this package, you will see a new component labeled "PDX" in the "Data Access" palette.
,

What databases can Lazarus access?

Indeed, Lazarus itself is shipped with components that allow acces to a variety of databases (open source or not) or file formats:

  1. Comma-Separated Value (CSV) files

Any database for which a ODBC driver exists.
There are also components available that can keep in-memory data.
,

What is the data access mechanism in Free Pascal/Lazarus?

In this article, the architecture of the data access mechanism in Free Pascal/Lazarus has been presented, and demonstrated with 2 specific examples that operate on data in memory or in simple flat files with comma-separated values.
In addition to comma-delimited files, there is also a TFixedFormatDataSet component available.


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