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How would you write a query to get Customer Id, VisitDate, NumberOfDaysFromFirstVisit from the tables below? 
 
Customer 
Id &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Name 
101 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Name1 
102 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Name2 
103 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;Name3 
… &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;… 
 
 
 
CustomerVisit 
Id &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;VisitDate &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;VisitedCity 
101 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/1/2017 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City1 
101 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/5/2016 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City2 
101 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/3/2016 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City3 
102 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/1/2016 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City1 
102 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/5/2016 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City2 
102 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/3/2016 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City1 
102 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/1/2016 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City2 
103 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/1/2017 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City1 
104 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/1/2017 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City2 
105 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;1/1/2017 &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;City4 
... &nbsp; &nbsp; ... &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; ... 
 
 
 
Thank you in advance.
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How would you write a query to get Customer Id, VisitDate, NumberOfDaysFromFirstVisit from the tables below?

Customer
Id	Name
101	Name1
102	Name2
103	Name3
…	…



CustomerVisit
Id	VisitDate	VisitedCity
101	1/1/2017	City1
101	1/5/2016	City2
101	1/3/2016	City3
102	1/1/2016	City1
102	1/5/2016	City2
102	1/3/2016	City1
102	1/1/2016	City2
103	1/1/2017	City1
104	1/1/2017	City2
105	1/1/2017	City4
...     ...                     ...



Thank you in advance.

SQL query, getting number of days from first record

Microsoft SQL Server is a suite of relational database management system (RDBMS) products providing multi-user database access functionality.SQL Server is available in multiple versions, typically identified by release year, and versions are subdivided into editions to distinguish between product functionality. Component services include integration (SSIS), reporting (SSRS), analysis (SSAS), data quality, master data, T-SQL and performance tuning.

Microsoft SQL Server

SQL (Structured Query Language) is designed to be used in conjunction with relational database products as of a means of working with sets of data. SQL consists of data definition, data manipulation, and procedural elements. Its scope includes data insert, query, update and delete, schema creation and modification, and data access control.

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