The examples are based on a table called Parts with a column PartNumber, a table called SUPPLIERS with a column SUPPLIERNUMBER, and a table called Customers with a column CustomerNumber.
It ignores the username and password passed in in the connection string.
This is followed at the end by a recommendation concerning the choice of column / table names if there is to be an option to change databases.The different supported databases exhibit special characteristics in handling the uppercase / lowercase spelling of column and table names, which are shown below for each database. Finally, it depends on the database and the JDBC driver whether the primitive type conversion works 100%.Īn example is the definition of the data type Bool in PostgreSQL: Via the PostgreSQL-ODBC driver, the data type Boolean is mapped on, so that a conversion to the primitive type Boolean does not work.įurther information on SQL requests of various databases: The respective JDBC driver specifies the mapping of native database types on the JDBC types. The JDBC standard specifies the SQL types and a standard mapping on Java types. Using the option Convert Integer, Double and Boolean, DatabaseDataSource can be set in such a way that the database column types of the external relational databases are converted to the primitive EEC data types Integer, Double and Boolean.ĭepending on the database, there are special points to note: The results of requests to external relational databases are returned as strings by default. In this case, the Connection URL for hsqldb is then, for example, jdbc:hsqldb:hsql://localhost/xdb. If the Connection URL is written without stating the user name and password, no semicolon has to be added at the end. The JDBC-ODBC bridge does not support Unicode. Note that the function names contain mssql, not mysql.
Unicode support is available only for URLs that point to native JDBC drivers. Dim dtrTbl As SqlDataReader conn New SqlConnection( Serverlocalhostsqlexpress uidUSERNAME. The following example demonstrates how to connect to a MS SQL database from PHP.