如何消除MySQL中的重复行？

Question

即使将查询作为SELECT DISTINCT STATES运行，我也会收到重复项。

这是查询

SELECT COUNT(*) AS `Rows`, `STATE` FROM `bank_database` GROUP BY `STATE` ORDER BY `STATE` LIMIT 100

这是输出

我需要

 63      ANDAMAN AND NICOBAR ISLAND
 7311    ANDHRA PRADESH
 150     ARUNACHAL PRADESH
 ...
 and so on

这是我的数据库结构。

帮助。 在此先感谢。

我有这个查询

SELECT DISTINCT BRANCH FROM `BANK`.`BANK_DATABASE` WHERE (BANK = '$bank_name' AND STATE = '$state_name' AND DISTRICT = '$district_name')"

以上查询对某些银行是正确的，而某些银行则失败。

Answer 1

试试这个，必须有一些空格。

     SELECT COUNT(*) AS `Rows`, trim(STATE) FROM `bank_database` 
     GROUP BY  trim(STATE)  
     ORDER BY trim(STATE) LIMIT 100

如果工作正常，请运行此查询以修复数据问题。

 update tableName set state =  trim(state);

Answer 2

数据真的不一样吗？数据中有一个空格。

'ANDAMAN AND NICOBAR ISLAND' != 'ANDAMAN AND NICOBAR ISLAND space'  

Answer 3

您可以使用COUNT(DISTINCT *)这只会计算不同的值

Answer 4

我可以通过此查询解析 data anomaly 以上

UPDATE BANK_DATABASE
SET STATE = TRIM(TRAILING '\r' FROM STATE)
WHERE STATE = TRIM(TRAILING '\n' FROM STATE)

无论如何，感谢大家。