please see below, all joined with left outer join.
primary table is PREA,
prea.prco to [all_tables].prco
prea.employee to prel.employee
prea.edlcode to prdl.dlcode
prea.edltype to prdl.dltype
prea.edlcode to prec.earncode
SELECT [PRCo]
,[EarnCode]
,[Description]
FROM [bPREC]
SELECT [PRCo]
,[DLCode]
,[Description]
,[DLType]
FROM [bPRDL]
SELECT [PRCo]
,[Employee]
,[EDLType]
,[EDLCode]
FROM [bPREA]
SELECT [PRCo]
,[Employee]
,[LeaveCode]
FROM [bPREL]
hope the above helps