Question 229

Time Between Repeat Purchases

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***** * ***** ** ******* *** ******** ** ****** ********* *** **** *******. ************, ********* *** ******* **** (** ****) ******* ********** ********* ** *** **** ******* ** *** **** ********. ******* **** ********* *** **** ********* *** **** ******* **** **** **** *** ***** *** ****** ** *** ******* ****. *** ****** ****** **** *** ******* ****, ******** ****, *** *** ******* **** ******** ******* ***** ********* ** **** *******.

*****:

  • *** *** *** ******** ** *** *** **** **** ** *** ******** ******** ** *** **** ******* ** *** **** ********.
  • ********* *** ********** ** **** ******* ********** *********.
  • *** *** ** **** *** ******* **** ******** *** **** *******/******** ****.
  • ****** ** ******* **** ********* **** **** **** *** ******** ** *** **** *******.

******** ****** *******:

  • ******* ****
  • ******** ****
  • ******* **** ******** (** ****)

Table 1: msft_customers

******** ******* ***** *********, ********* ***** **, ****, ***, ******, *** *** **** **** ******.

********_**: ***, ****: *******, ***: ***, ******: *******, ****_****: ****

Table 2: msft_products

***** *********** ** ********, **** ** ******* **, ****, *****, *** ********.

*******_**: ***, *******_****: *******, *****: *******, ********: *******

Table 3: msft_sales

******* ******* ** ***** ************, ********* *** **** **, ******** **, ******* **, **** ** *** ***********, *** *** ******** ** ******** ****.

****_**: ***, ********_**: ***, *******_**: ***, ****_****: ****, ********: ***

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