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Note: Given the above, many users will use SQLDB or Zeos due to the advantages unless they need lower-level access to the SQLite library Using the SQLdb components with SQLite Changing to other databases is more difficult than if you use the SQLDB or Zeos components.Flexible: programmers can choose to use or not to use the SQL language, allowing them to work with simple table layouts or any complex layout that SQL/sqlite allows.For new projects, you would presumably use TSQlite3Dataset as SQLite 3.x is the current version.īelow is a list of the principal advantages and disadvantages compared to other FPC/Lazarus SQLite drivers/access methods: TSqliteDataset and TSqlite3Dataset are TDataSet descendants that access, respectively, 2.8.x and 3.x.x sqlite databases. Visit the sqlite4fpc homepage to find the API reference and more tutorials.

#Free pascal datetime how to#

There are also separate TSQLiteDataset (unit sqliteds) and TSQLite3Dataset (unit sqlite3ds) packages see below for a description on how to use them. Sqlite3backup is a unit provided with FPC (not in Lazarus but can be used programmatically) that provides backup/restore functionality for SQLite3.

wxSQLite3: open source, some binaries for Linux available (ex: )ĭepending on what you use it might also be necessary to enable the encryption separately as written here at the point "5.0 C interface", where you need to invoke sqlite3_activate_see() with your product key before accessing an encrypted database.

: open source, Windows (32, 64, CE) binaries available, download e.g one of the Precompiled Binaries and rename to sqlite3.dll (if you're using the Statically Linked ones, presumably you need to rename to sqlite3.dll).

#Free pascal datetime for free#

Windows binaries not for free (you have to compile them yourself) Use the Password property to set the encryption key. In recent FPC versions (beginning with FPC 3.0.0, implemented March 2012), SQLDB included support for some extended versions of SQLite3 which encrypt the SQLite database file using the AES algorithm. Spatialite are GIS extensions to SQLite which you can use from within SQLDB.

The advantage of using SQLDB is that it is fairly easy to change to a different database such as Firebird or PostgreSQL without changing your program too much. create GUIs with database components such as TDBGrids.

#Free pascal datetime trial#

You can download a trial version of this commercial product at Lazarus components.įPC/Lazarus offers the built-in SQLDB components that include support for SQLite databases ( TSQLite3Connection) from the SQLdb tab of the Component Palette, which allow you to e.g. LiteDAC is designed for programmers to develop truly cross-platform desktop and mobile SQLite database applications with no need to deploy any additional libraries. SQLite Data Access Components (LiteDAC) is a library of components that provides native connectivity to SQLite from Lazarus (and Free Pascal) on Windows, macOS, iOS, Android, Linux, and FreeBSD for both 32-bit and 64-bit platforms. You can use an easy way to connect SQLite with Lazarus. Win64: please see warning here on not using certain FPC/Lazarus Win64 versions.

#Free pascal datetime install#

Both should be install via system package manager and marked as a dependency rather than being distributed with your application. Most Linux distributions have sqlite3 (eg libsqlite3.so.0) installed by default but Debian based distros, at least, also require the matching Dev package to get libsqlite3.so. See And read on especially for TSQLite3Dataset and TSQLiteDataset See below This might also need to be included in you Lazarus IDE directory. (projectdir)/lib/architecture/ depending on your Lazarus project settings) (and distributed with your executable) in order to work.

#Free pascal datetime drivers#

Various drivers can be used to access SQLite from FPC/Lazarus programs.Īll drivers do need the SQLite library/dll in the executable directory (which can be your project directory or e.g. SQLite is an embedded (non-server) single-user database that can be used in FPC and Lazarus applications.

2.6 Vacuum and other operations that must be done outside a transaction.

2.4.1 Default values in local time instead of UTC.

2 Using the SQLdb components with SQLite.

Return a string representation of a TDateTime value with a given format. In case a wrong formatting character is found, an EConvertError is raised. Note that on unix systems, the localization support must be enabled explicitly, see Localization. Note that for 'c', if the time part is 0 (i.e. DeclarationĭateTimeToString returns in Result a string representation of DateTime using the formatting specified in FormatStr.įor a list of characters that can be used in the FormatStr formatting string, see formatchars. DateTimeToString Ĭonverts a TDateTime value to a string with a given format.