如何连接 SQL 中的两个表以从一个表中获取名称并在查询中显示它们？

Question

I have two tables like this:

Employee Table

EmployeeID    firstName    lastName
1             Johnny       Depp
2             Rebecca      Smith
3             Rodger       Doe

Sales Table

EmployeeID    Sales 
1             100.20
2             200.19
3             355.23

And I'd like to join the tables to do something like this:

EmployeeID fullName      Sales 
1          Johnny Depp   100.20
2          Rebecca Smith 200.19
3          Rodger Doe    355.23

How would I do that? Here's what I tried so far:

SELECT employee.firstName + employee.lastName AS fullName, employeeID, sales
FROM employee i 
INNER JOIN Sales s ON s.customerID = i.CustomerID

I'm getting a syntax error at my "+" symbol.

What's my problem? Thanks!

Answer 1

as @Gordon said,use CONCAT() :

SELECT CONCAT(employee.firstName, ' ', employee.lastName) AS fullName
       , employeeID
       , sales
FROM employee i 
INNER JOIN Sales s 
   ON s.customerID = i.CustomerID