Here is the sample query to retrieve the Journal entries/balance for a particular period. Please note this is a sample query. Modify accordingly as per your requirement.
SELECT
gl.PERIOD_NAME,
gl.JOURNAL_CATEGORY_NAME,
COUNT(*) as ENTRY_COUNT,
SUM(gl.ENTERED_DR) as TOTAL_DEBIT,
SUM(gl.ENTERED_CR) as TOTAL_CREDIT
FROM GL_JE_HEADERS gh,
GL_JE_LINES gl
WHERE gh.JE_HEADER_ID = gl.JE_HEADER_ID
AND gl.PERIOD_NAME = :P_PERIOD_NAME
GROUP BY gl.PERIOD_NAME, gl.JOURNAL_CATEGORY_NAME
ORDER BY gl.PERIOD_NAME;