This is what data prior to SQL Server and Oracle looked like:

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* MEDICAL INSURANCE CLAIMS HIERARCHICAL FILE - CIRCA 1982 *

* RECORD TYPES: H=HOSPITAL(MASTER) P=PATIENT D=DIAGNOSIS C=CLAIM DETAIL *

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H001MEMORIAL GENERAL HOSPITAL 19820415NEW YORK NY10001212555010001520000

P001001JOHNSON ROBERT M19450312001234567819820102BCBS

D001001001HYPERTENSION 401.9 19820102

D001001002DIABETES TYPE 2 250.00 19820102

C00100100119820102OV0992001200120

C00100100219820102LAB8100305003050

C00100100319820102RX1150002500250

P001002SMITH MARY F19580624002345678919820115AETNA

D001002001PNEUMONIA 486 19820115

C00100200119820115ER0992505002500

C00100200219820115XR7100108001080

C00100200319820115RX1150012501250