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#Free pascal sqlite example code how to
#Free pascal sqlite example code code

#Free pascal sqlite example code code

However, the above code intends to show the database code and thus the finishing touches are left out.) (The code above of course is not quite finished, it misses 'try.finally' blocks. DatabaseName := 'test_dbase' Query := TSQLQuery. Create ( nil ) ATransaction := TSQLTransaction. Program ConnectDB uses DB, Sysutils, sqldb, sqlite3conn var AConnection : TSQLConnection ATransaction : TSQLTransaction Query : TSQLQuery begin AConnection := TSQLite3Connection. Use the 'close' method to end the connection with the server. Use the property 'connected' to test if a connection has been made with the database server. If the connection fails, a EDatabaseError exception is thrown. When these properties are set, you can create a connection with the 'open' method. This is not related to the MySQL server using the MySQL 4.1 client library you can probably connect to a MySQL 5.0 server (see MySQL documentation regarding what combinations are supported).Īlthough details differ for the various databases, in general you need to set four properties to connect to a database server: If a MySQL client library version 4.1 is installed, you have to use a TMySQL41Connection. Note for MySQL - There are many differences between the client versions to the extent that the clients and connections cannot be interchanged. Sybase ASE: TSybaseConnection (available since FPC 2.6.1, see Lazarus and MSSQL/Sybase).Sqlite3: TSQLite3Connection (available since FPC version 2.2.2, see SQLite#Built-in_SQLDB).PostgreSQL: TPQConnection (see postgresql#SQLDB).ODBC: TODBCConnection (see ODBCConn#TODBCConnection).MySQL v5.6: TMySQL56Connection (available in Lazarus 1.2.4/FPC version 2.6.4.MySQL v5.5: TMySQL55Connection (available since Lazarus 1.0.8/FPC version 2.6.2.MySQL v5.1: TMySQL51Connection (available since FPC version 2.5.1.MS SQL Server: TMSSQLConnection (available since FPC 2.6.1).Various TSQLConnection components are available for different database servers (see SQLdb_Package): When the client library is installed properly you can connect to a database server using a TSQLConnection component. This means that a client library must be installed on the computer to make a connection to a database. SqlDB sends the commands to the client library the client library connects to the database and and transfers the commands. SqlDB doesn't connect to a database server directly but uses a client that corresponds to the used database server. Please see the official documentation at SQLDB documentation. 10 Troubleshooting: TSQLConnection logging.

#Free pascal sqlite example code how to

8 How to execute a query using TSQLQuery?.

6 How does SqlDB send the changes to the database server?.

4.2 Why does TSQLQuery.RecordCount always return 10?.

3 How to execute direct queries/make a table?.

1 Where can I find official documentation?.