Spreadsheet: 131028d1322696501-matching-dates-and-returning-another-column-instructor
Sheet: Sheet1

 |  |  |  | Instructor | Instructor | Total
 |  |  |  | Sheet2 | Sheet3
 | 2012-01-16 00:00:00 | Period 1 |  | 1 |  | 1
 | 2012-01-16 00:00:00 | Period 2 |  | 2 |  | 2
 | 2012-01-16 00:00:00 | Period 3 |  | 3 |  | 3
 | 2012-01-16 00:00:00 | Period 4 |  | 4 |  | 4
 | 2012-01-16 00:00:00 | Period 5 |  | 5 |  | 5
 | 2012-01-16 00:00:00 | Period 6 |  | 6 |  | 6
 | 2012-01-16 00:00:00 | Period 7 |  | 7 |  | 7
 | 2012-01-16 00:00:00 | Period 8 |  | 8 |  | 8
 | 2012-01-16 00:00:00 | Period 9 |  | 9 |  | 9
 | 2012-01-17 00:00:00 | Period 1 |  | 10 |  | 10
 | 2012-01-17 00:00:00 | Period 2 |  | 11 |  | 11
 | 2012-01-17 00:00:00 | Period 3 |  | 12 |  | 12
 | 2012-01-17 00:00:00 | Period 4 |  | 13 |  | 13
 | 2012-01-17 00:00:00 | Period 5 |  | 14 |  | 14
 | 2012-01-17 00:00:00 | Period 6 |  | 15 |  | 15
 | 2012-01-17 00:00:00 | Period 7 |  | 16 |  | 16
 | 2012-01-17 00:00:00 | Period 8 |  | 17 |  | 17
 | 2012-01-17 00:00:00 | Period 9 |  | 18 |  | 18
 | 2012-01-18 00:00:00 | Period 1 |  | 19 |  | 19
 | 2012-01-18 00:00:00 | Period 2 |  | 20 |  | 20
 | 2012-01-18 00:00:00 | Period 3 |  | 21 |  | 21
 | 2012-01-18 00:00:00 | Period 4 |  | 22 |  | 22
 | 2012-01-18 00:00:00 | Period 5 |  | 23 |  | 23
 | 2012-01-18 00:00:00 | Period 6 |  | 24 |  | 24
 | 2012-01-18 00:00:00 | Period 7 |  | 25 |  | 25
 | 2012-01-18 00:00:00 | Period 8 |  | 26 |  | 26
 | 2012-01-18 00:00:00 | Period 9 |  | 27 |  | 27
 | 2012-01-19 00:00:00 | Period 1 |  | 28 | 1 | 29
 | 2012-01-19 00:00:00 | Period 2 |  | 29 | 1 | 30
 | 2012-01-19 00:00:00 | Period 3 |  | 30 | 1 | 31
 | 2012-01-19 00:00:00 | Period 4 |  | 31 | 1 | 32
 | 2012-01-19 00:00:00 | Period 5 |  | 32 | 1 | 33
 | 2012-01-19 00:00:00 | Period 6 |  | 33 | 1 | 34
 | 2012-01-19 00:00:00 | Period 7 |  | 34 | 1 | 35
 | 2012-01-19 00:00:00 | Period 8 |  | 35 | 1 | 36
 | 2012-01-19 00:00:00 | Period 9 |  | 36 | 1 | 37
 | 2012-01-20 00:00:00 | Period 1 |  | 37 | 0 | 37
 | 2012-01-20 00:00:00 | Period 2 |  | 38 | 0 | 38
 | 2012-01-20 00:00:00 | Period 3 |  | 39 | 0 | 39
 | 2012-01-20 00:00:00 | Period 4 |  | 40 | 0 | 40
 | 2012-01-20 00:00:00 | Period 5 |  | 41 | 0 | 41
 | 2012-01-20 00:00:00 | Period 6 |  | 42 | 2 | 44
 | 2012-01-20 00:00:00 | Period 7 |  | 43 | 2 | 45
 | 2012-01-20 00:00:00 | Period 8 |  | 44 | 2 | 46
 | 2012-01-20 00:00:00 | Period 9 |  | 45 | 2 | 47
 | 2012-01-21 00:00:00 | Period 1 |  | 46 | 1 | 47
 | 2012-01-21 00:00:00 | Period 2 |  | 47 | 1 | 48
 | 2012-01-21 00:00:00 | Period 3 |  | 48 | 1 | 49
 | 2012-01-21 00:00:00 | Period 4 |  | 49 | 1 | 50
 | 2012-01-21 00:00:00 | Period 5 |  | 50 | 1 | 51
 | 2012-01-21 00:00:00 | Period 6 |  | 51 | 1 | 52
 | 2012-01-21 00:00:00 | Period 7 |  | 52 | 1 | 53
 | 2012-01-21 00:00:00 | Period 8 |  | 53 | 1 | 54
 | 2012-01-21 00:00:00 | Period 9 |  | 1 | 1 | 2
 | 2012-01-22 00:00:00 | Period 1 |  | 0 | 0
 | 2012-01-22 00:00:00 | Period 2 |  | 0 | 0
 | 2012-01-22 00:00:00 | Period 3 |  | 0 | 0
 | 2012-01-22 00:00:00 | Period 4 |  | 0 | 0
 | 2012-01-22 00:00:00 | Period 5 |  | 0 | 0
 | 2012-01-22 00:00:00 | Period 6 |  | 2 | 2 | 4
 | 2012-01-22 00:00:00 | Period 7 |  | 2 | 2 | 4
 | 2012-01-22 00:00:00 | Period 8 |  | 2 | 2 | 4
 | 2012-01-22 00:00:00 | Period 9 |  | 2 | 2 | 4
 | 2012-01-23 00:00:00 | Period 1 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 2 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 3 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 4 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 5 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 6 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 7 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 8 |  | 1 | 1 | 2
 | 2012-01-23 00:00:00 | Period 9 |  | 1 | 1 | 2
 | 2012-01-24 00:00:00 | Period 1 |  | 0 | 0
 | 2012-01-24 00:00:00 | Period 2 |  | 0 | 0
 | 2012-01-24 00:00:00 | Period 3 |  | 0 | 0
 | 2012-01-24 00:00:00 | Period 4 |  | 0 | 0
 | 2012-01-24 00:00:00 | Period 5 |  | 0 | 0
 | 2012-01-24 00:00:00 | Period 6 |  | 2 | 2 | 4
 | 2012-01-24 00:00:00 | Period 7 |  | 2 | 2 | 4
 | 2012-01-24 00:00:00 | Period 8 |  | 2 | 2 | 4
 | 2012-01-24 00:00:00 | Period 9 |  | 2 | 2 | 4
 | 2012-01-25 00:00:00 | Period 1 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 2 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 3 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 4 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 5 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 6 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 7 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 8 |  | 1 | 1 | 2
 | 2012-01-25 00:00:00 | Period 9 |  | 1 | 1 | 2
 | 2012-01-26 00:00:00 | Period 1 |  | 1 | 0 | 1
 | 2012-01-26 00:00:00 | Period 2 |  | 1 | 0 | 1
 | 2012-01-26 00:00:00 | Period 3 |  | 1 | 0 | 1
 | 2012-01-26 00:00:00 | Period 4 |  | 1 | 0 | 1
 | 2012-01-26 00:00:00 | Period 5 |  | 1 | 0 | 1
 | 2012-01-26 00:00:00 | Period 6 |  | 1 | 2 | 3
 | 2012-01-26 00:00:00 | Period 7 |  | 1 | 2 | 3
 | 2012-01-26 00:00:00 | Period 8 |  | 1 | 2 | 3
 | 2012-01-26 00:00:00 | Period 9 |  | 1 | 2 | 3
 | 2012-01-27 00:00:00 | Period 1 |  | 0 | 1 | 1
 | 2012-01-27 00:00:00 | Period 2 |  | 0 | 1 | 1
 | 2012-01-27 00:00:00 | Period 3 |  | 0 | 1 | 1
 | 2012-01-27 00:00:00 | Period 4 |  | 0 | 1 | 1
 | 2012-01-27 00:00:00 | Period 5 |  | 0 | 1 | 1
 | 2012-01-27 00:00:00 | Period 6 |  | 2 | 1 | 3
 | 2012-01-27 00:00:00 | Period 7 |  | 2 | 1 | 3
 | 2012-01-27 00:00:00 | Period 8 |  | 2 | 1 | 3
 | 2012-01-27 00:00:00 | Period 9 |  | 2 | 1 | 3
 | 2012-01-28 00:00:00 | Period 1 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 2 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 3 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 1 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 2 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 3 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 4 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 5 |  | 1 | 0 | 1
 | 2012-01-28 00:00:00 | Period 6 |  | 1 | 2 | 3
 | 2012-01-29 00:00:00 | Period 7 |  | 2 | 1 | 3
 | 2012-01-29 00:00:00 | Period 8 |  | 2 | 1 | 3
 | 2012-01-29 00:00:00 | Period 9 |  | 2 | 1 | 3
 | 2012-01-29 00:00:00 | Period 1 |  | 0 | 1 | 1
 | 2012-01-29 00:00:00 | Period 2 |  | 0 | 1 | 1
 | 2012-01-29 00:00:00 | Period 3 |  | 0 | 1 | 1
 | 2012-01-29 00:00:00 | Period 4 |  | 0 | 1 | 1
 | 2012-01-29 00:00:00 | Period 5 |  | 0 | 1 | 1
 | 2012-01-29 00:00:00 | Period 6 |  | 2 | 1 | 3
 | 2012-01-30 00:00:00 | Period 7 |  | 1 | 2 | 3
 | 2012-01-30 00:00:00 | Period 8 |  | 1 | 2 | 3
 | 2012-01-30 00:00:00 | Period 9 |  | 1 | 2 | 3
 | 2012-01-30 00:00:00 | Period 1 |  | 1 | 0 | 1
 | 2012-01-30 00:00:00 | Period 2 |  | 1 | 0 | 1
 | 2012-01-30 00:00:00 | Period 3 |  | 1 | 0 | 1
 | 2012-01-30 00:00:00 | Period 4 |  | 1 | 0 | 1
 | 2012-01-30 00:00:00 | Period 5 |  | 1 | 0 | 1
 | 2012-01-30 00:00:00 | Period 6 |  | 1 | 2 | 3
 | 2012-01-31 00:00:00 | Period 7 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 8 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 9 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 1 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 2 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 3 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 4 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 5 |  |  | 1 | 1
 | 2012-01-31 00:00:00 | Period 6 |  |  | 1 | 1
 | 2012-02-01 00:00:00 | Period 7 |  |  | 2 | 2
 | 2012-02-01 00:00:00 | Period 8 |  |  | 2 | 2
 | 2012-02-01 00:00:00 | Period 9 |  |  | 2 | 2
 | 2012-02-01 00:00:00 | Period 1 |  |  | 0
 | 2012-02-01 00:00:00 | Period 2 |  |  | 0
 | 2012-02-01 00:00:00 | Period 3 |  |  | 0
 | 2012-02-01 00:00:00 | Period 1 |  |  | 0
 | 2012-02-01 00:00:00 | Period 2 |  |  | 0
 | 2012-02-01 00:00:00 | Period 3 |  |  | 0
 | 2012-02-02 00:00:00 | Period 4
 | 2012-02-02 00:00:00 | Period 5
 | 2012-02-02 00:00:00 | Period 6
 | 2012-02-02 00:00:00 | Period 7
 | 2012-02-02 00:00:00 | Period 8
 | 2012-02-02 00:00:00 | Period 9
 | 2012-02-02 00:00:00 | Period 1
 | 2012-02-02 00:00:00 | Period 2
 | 2012-02-02 00:00:00 | Period 3
 | 2012-02-03 00:00:00 | Period 4
 | 2012-02-03 00:00:00 | Period 5
 | 2012-02-03 00:00:00 | Period 6
 | 2012-02-03 00:00:00 | Period 7
 | 2012-02-03 00:00:00 | Period 8
 | 2012-02-03 00:00:00 | Period 9
 | 2012-02-03 00:00:00 | Period 1
 | 2012-02-03 00:00:00 | Period 2
 | 2012-02-03 00:00:00 | Period 3
 | 2012-02-04 00:00:00 | Period 4
 | 2012-02-04 00:00:00 | Period 5
 | 2012-02-04 00:00:00 | Period 6
 | 2012-02-04 00:00:00 | Period 7
 | 2012-02-04 00:00:00 | Period 8
 | 2012-02-04 00:00:00 | Period 9
 | 2012-02-04 00:00:00 | Period 1
 | 2012-02-04 00:00:00 | Period 2
 | 2012-02-04 00:00:00 | Period 3
 | 2012-02-05 00:00:00 | Period 4
 | 2012-02-05 00:00:00 | Period 5
 | 2012-02-05 00:00:00 | Period 6
 | 2012-02-05 00:00:00 | Period 7
 | 2012-02-05 00:00:00 | Period 8
 | 2012-02-05 00:00:00 | Period 9
 | 2012-02-05 00:00:00 | Period 1
 | 2012-02-05 00:00:00 | Period 2
 | 2012-02-05 00:00:00 | Period 3
 | 2012-02-06 00:00:00 | Period 1
 | 2012-02-06 00:00:00 | Period 2
 | 2012-02-06 00:00:00 | Period 3
 | 2012-02-06 00:00:00 | Period 4
 | 2012-02-06 00:00:00 | Period 5
 | 2012-02-06 00:00:00 | Period 6
 | 2012-02-06 00:00:00 | Period 7
 | 2012-02-06 00:00:00 | Period 8
 | 2012-02-06 00:00:00 | Period 9
 | 2012-02-07 00:00:00 | Period 1
 | 2012-02-07 00:00:00 | Period 2
 | 2012-02-07 00:00:00 | Period 3
 | 2012-02-07 00:00:00 | Period 4
 | 2012-02-07 00:00:00 | Period 5
 | 2012-02-07 00:00:00 | Period 6
 | 2012-02-07 00:00:00 | Period 7
 | 2012-02-07 00:00:00 | Period 8
 | 2012-02-07 00:00:00 | Period 9
 | 2012-02-08 00:00:00 | Period 1
 | 2012-02-08 00:00:00 | Period 2
 | 2012-02-08 00:00:00 | Period 3
 | 2012-02-08 00:00:00 | Period 4
 | 2012-02-08 00:00:00 | Period 5
 | 2012-02-08 00:00:00 | Period 6
 | 2012-02-08 00:00:00 | Period 7
 | 2012-02-08 00:00:00 | Period 8
 | 2012-02-08 00:00:00 | Period 9
 | 2012-02-09 00:00:00 | Period 1
 | 2012-02-09 00:00:00 | Period 2
 | 2012-02-09 00:00:00 | Period 3
 | 2012-02-09 00:00:00 | Period 4
 | 2012-02-09 00:00:00 | Period 5
 | 2012-02-09 00:00:00 | Period 6
 | 2012-02-09 00:00:00 | Period 7
 | 2012-02-09 00:00:00 | Period 8
 | 2012-02-09 00:00:00 | Period 9
 | 2012-02-10 00:00:00 | Period 1
 | 2012-02-10 00:00:00 | Period 2
 | 2012-02-10 00:00:00 | Period 3
 | 2012-02-10 00:00:00 | Period 1
 | 2012-02-10 00:00:00 | Period 2
 | 2012-02-10 00:00:00 | Period 3
 | 2012-02-10 00:00:00 | Period 4
 | 2012-02-10 00:00:00 | Period 5
 | 2012-02-10 00:00:00 | Period 6
 | 2012-02-11 00:00:00 | Period 7
 | 2012-02-11 00:00:00 | Period 8
 | 2012-02-11 00:00:00 | Period 9
 | 2012-02-11 00:00:00 | Period 1
 | 2012-02-11 00:00:00 | Period 2
 | 2012-02-11 00:00:00 | Period 3
 | 2012-02-11 00:00:00 | Period 4
 | 2012-02-11 00:00:00 | Period 5
 | 2012-02-11 00:00:00 | Period 6
 | 2012-02-12 00:00:00 | Period 7
 | 2012-02-12 00:00:00 | Period 8
 | 2012-02-12 00:00:00 | Period 9
 | 2012-02-12 00:00:00 | Period 1
 | 2012-02-12 00:00:00 | Period 2
 | 2012-02-12 00:00:00 | Period 3
 | 2012-02-12 00:00:00 | Period 4
 | 2012-02-12 00:00:00 | Period 5
 | 2012-02-12 00:00:00 | Period 6
 | 2012-02-13 00:00:00 | Period 7
 | 2012-02-13 00:00:00 | Period 8
 | 2012-02-13 00:00:00 | Period 9
 | 2012-02-13 00:00:00 | Period 1
 | 2012-02-13 00:00:00 | Period 2
 | 2012-02-13 00:00:00 | Period 3
 | 2012-02-13 00:00:00 | Period 4
 | 2012-02-13 00:00:00 | Period 5
 | 2012-02-13 00:00:00 | Period 6
 | 2012-02-14 00:00:00 | Period 7
 | 2012-02-14 00:00:00 | Period 8
 | 2012-02-14 00:00:00 | Period 9
 | 2012-02-14 00:00:00 | Period 1
 | 2012-02-14 00:00:00 | Period 2
 | 2012-02-14 00:00:00 | Period 3
 | 2012-02-14 00:00:00 | Period 1
 | 2012-02-14 00:00:00 | Period 2
 | 2012-02-14 00:00:00 | Period 3
 | 2012-02-15 00:00:00 | Period 4
 | 2012-02-15 00:00:00 | Period 5
 | 2012-02-15 00:00:00 | Period 6
 | 2012-02-15 00:00:00 | Period 7
 | 2012-02-15 00:00:00 | Period 8
 | 2012-02-15 00:00:00 | Period 9
 | 2012-02-15 00:00:00 | Period 1
 | 2012-02-15 00:00:00 | Period 2
 | 2012-02-15 00:00:00 | Period 3
 | 2012-02-16 00:00:00 | Period 4
 | 2012-02-16 00:00:00 | Period 5
 | 2012-02-16 00:00:00 | Period 6
 | 2012-02-16 00:00:00 | Period 7
 | 2012-02-16 00:00:00 | Period 8
 | 2012-02-16 00:00:00 | Period 9
 | 2012-02-16 00:00:00 | Period 1
 | 2012-02-16 00:00:00 | Period 2
 | 2012-02-16 00:00:00 | Period 3
 | 2012-02-17 00:00:00 | Period 4
 | 2012-02-17 00:00:00 | Period 5
 | 2012-02-17 00:00:00 | Period 6
 | 2012-02-17 00:00:00 | Period 7
 | 2012-02-17 00:00:00 | Period 8
 | 2012-02-17 00:00:00 | Period 9
 | 2012-02-17 00:00:00 | Period 1
 | 2012-02-17 00:00:00 | Period 2
 | 2012-02-17 00:00:00 | Period 3
 | 2012-02-18 00:00:00 | Period 4
 | 2012-02-18 00:00:00 | Period 5
 | 2012-02-18 00:00:00 | Period 6