JDBC Tutorials - Herong's Tutorial Examples - v3.12, by Dr. Herong Yang
"ij" - Client Tool to Create New Databases
This section describes how to use the command line tool 'ij' to create a new database with a new table.
"ij" is a command line client tool included in the Java DB package. You can use "ij" to run any SQL statements on the Java DB server. "ij" uses the JDBC driver to connect to the Java DB server with the "connect" command in this format:
connect 'jdbc:derby://<host>:<port>/<database>'; Create a new database and connect to that database connect 'jdbc:derby://<host>:<port>/<database>;create=true'; Connect to an existing database
Here is how I used "ij" to create a new database and a new table. Open another command line window and run the following commands:
(on Windows) herong> %DERBY_HOME%\bin\ij (on Linux or macOS) herong> $DERBY_HOME/bin/ij ij version 10.15 ij> connect 'jdbc:derby://localhost/TestDB;create=true'; ij> CREATE TABLE TestTable (ID INT, Name VARCHAR(20)); 0 rows inserted/updated/deleted ij> INSERT INTO TestTable VALUES (1, 'Herong'); 1 row inserted/updated/deleted ij> SELECT * FROM TestTable; ID |NAME -------------------------------- 1 |Herong 1 row selected ij> quit;
When I look at my Derby database directory, lib\javadb\databases\ or lib/javadb/databases, I see a sub-directory called, "TestDB", which represents the database instance I created with the "connect" command.
Cool. Now I have the Java DB server running, and I know how to run SQL statements to store and query data with the "ij" tool.
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