从表中删除重复的行 [英] Removing duplicate rows from a table

问题描述

id     lat                long     speed      date          address
 1    22.92138131   72.44103313     3.96 km/h     2011-09-26  National, Gujarat, India
 2    22.92138145   72.44103413     13.96 km/h     2011-09-26  National, Gujarat, India
 3    22.92138134   72.44103423     15.96 km/h     2011-09-26  National, Gujarat, India
 4    22.92138454   72.44103233     13.96 km/h     2011-09-26  10t ring Rd, Nehru Nagar
 5    22.92138354   72.44102533     13.96 km/h     2011-09-26  Anandnagar Rd, Ahmedabad
 6    22.92138484   72.44103293     19.96 km/h     2011-09-26  Anandnagar Rd, Ahmedabad

我想编写一个查询，使我的结果看起来像这样:

I want to write a query such that my result looks like this:

id     lat                long     speed      date          address
 1    22.92138131   72.44103313     3.96 km/h     2011-09-26  National, Gujarat, India
 4    22.92138454   72.44103233     13.96 km/h     2011-09-26  10t ring Rd, Nehru Nagar
 5    22.92138354   72.44102533     13.96 km/h     2011-09-26  Anandnagar Rd, Ahmedabad

我想根据地址删除重复的行.

I want to remove duplicate rows according to the address.

推荐答案

假定您希望返回ID值最小的行:

Assuming that you wish to return the rows with the smallest ID values:

SELECT 
    *
FROM
TABLENAME T INNER JOIN
(
    SELECT MIN(ID) AS ID FROM TableName 
    GROUP BY Address
) SUB ON T.ID = SUB.ID

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