我怎样才能定期制作日期模式，例如每周或7天的日期之间的差异，并且还包含值。
Sylhet SY072 Balaganj GT9108001 30-Jun-75 0.46 9.85 24.68 91.80 2.59
Sylhet SY072 Balaganj GT9108001 07-Jul-75 0.46 9.85 24.68 91.80 2.49
Sylhet SY072 Balaganj GT9108001 21-Jul-75 0.46 9.85 24.68 91.80 2.44
Sylhet SY072 Balaganj GT9108001 04-Aug-75 0.46 9.85 24.68 91.80 2.13
Sylhet SY072 Balaganj GT9108001 25-Aug-75 0.46 9.85 24.68 91.80 2.69
Sylhet SY072 Balaganj GT9108001 01-Sep-75 0.46 9.85 24.68 91.80 2.01
Sylhet SY072 Balaganj GT9108001 08-Sep-75 0.46 9.85 24.68 91.80 1.98
Sylhet SY072 Balaganj GT9108001 22-Sep-75 0.46 9.85 24.68 91.80 1.88
Sylhet SY072 Balaganj GT9108001 13-Oct-75 0.46 9.85 24.68 91.80 1.91
Sylhet SY072 Balaganj GT9108001 20-Oct-75 0.46 9.85 24.68 91.80 1.93
Sylhet SY072 Balaganj GT9108001 27-Oct-75 0.46 9.85 24.68 91.80 1.96
Sylhet SY072 Balaganj GT9108001 01-Dec-75 0.46 9.85 24.68 91.80 2.08
Sylhet SY072 Balaganj GT9108001 15-Dec-75 0.46 9.85 24.68 91.80 2.21
Sylhet SY072 Balaganj GT9108001 22-Dec-75 0.46 9.85 24.68 91.80 2.24
Sylhet SY072 Balaganj GT9108001 29-Dec-75 0.46 9.85 24.68 91.80 2.29
Sylhet SY072 Balaganj GT9108001 05-Jan-76 0.46 9.85 24.68 91.80 2.34
Sylhet SY072 Balaganj GT9108001 19-Jan-76 0.46 9.85 24.68 91.80 2.36
Sylhet SY072 Balaganj GT9108001 02-Feb-76 0.46 9.85 24.68 91.80 2.44
Sylhet SY072 Balaganj GT9108001 09-Feb-76 0.46 9.85 24.68 91.80 2.52
Sylhet SY072 Balaganj GT9108001 16-Feb-76 0.46 9.85 24.68 91.80 2.54
Sylhet SY072 Balaganj GT9108001 23-Feb-76 0.46 9.85 24.68 91.80 2.59
Sylhet SY072 Balaganj GT9108001 01-Mar-76 0.46 9.85 24.68 91.80 2.62
Sylhet SY072 Balaganj GT9108001 08-Mar-76 0.46 9.85 24.68 91.80 2.64
Sylhet SY072 Balaganj GT9108001 15-Mar-76 0.46 9.85 24.68 91.80 2.69
Sylhet SY072 Balaganj GT9108001 05-Apr-76 0.46 9.85 24.68 91.80 2.74
Sylhet SY072 Balaganj GT9108001 19-Apr-76 0.46 9.85 24.68 91.80 2.82
Sylhet SY072 Balaganj GT9108001 26-Apr-76 0.46 9.85 24.68 91.80 2.85