relationship/constraints info

Hello, All,
How can I get the infomation of relationship/constraints in DB from jdbc? How to add new relationship to DB using jdbc?
Thanks! -Zhining Zhang

which database product are you using?
In Oracle 8 you can query certain Oracle tables to find the information
Example:
use the query
"SELECT constraint_name, contraint_type, deferrable, validated
FROM dba_constraints
WHERE owner = "Scott"
AND table_name = 'Employees'"
the owner statement in the where clause is optional(only needed if the table exists twice in the same database!). You also have to have permissions to these table to access the data.
Jamie

thanks, jlrober!
I am using SQL Server now, but wish my code would work for ORACLE too ( if possible ). So I do not want to use DB's system objects, and want to use jdbc's features.
I am wondering if DatabaseMetaData has this info. How to use it to get constraint's info?
-Zhining Zhang

You probably have already looked into the following DatabaseMetaData methods, but in case you overlooked them:
getExportedKeys(String catalog, String schema, String table)
getImportedKeys(String catalog, String schema, String table)
getPrimaryKeys(String catalog, String schema, String table)
The above are only for primary key/foreign key constraints. I haven't come accross a solution for non-key constraints.
jamie

yes, it works!
Thanks, jlrober!!!
-Zhining Zhang

"ZhiningZhang", "jlrober",
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Thanks.