I installed jre software … created table in base.but unable to insert record…any solution?
You do not state the database you are using (Base is not a database).
Usual explanation for this type of problem is that there is no field assigned as a
Primary Key in the table. This is essential in an RDBMS (Relational Database Management System). Edit the table and assign (or insert new field for) a field as the primary key field.
Further information in documentation → LibreOffice Base Guide in Chapter #3 -Tables.