选择将多行连接成单行

Question

我有一张这样的表

用户

name   |  phone   |  email
jane   | 123456   |jane@test.com
jack   | 223456   |jack @test.com

我想选择这两个用户给出的电话号码是唯一的，请给出

borrower  |  lender   |  email
name      |  jack     | jane@test.com

这是我试过的

SELECT  u1.name borrower,u1.email, u2.name lender  FROM users u1  
LEFT JOIN users u2 on u2.phone='123456' WHERE u1.phone='223456'

这给了我4行而不是一行可能出错？

Answer 1

参见 SQLFIDDLE

SELECT 
  u1.name borrower,
  u1.email, 
  u2.name lender 
FROM 
  users u1, 
  users u2 
WHERE 
  u2.phone='123456' 
  and 
  u1.phone='223456'
;

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