Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException

1.错误日志

Caused by: com.mysql.jdbc.exceptions.jdbc4.MySQLIntegrityConstraintViolationException: Column 'merchant_id' in where clause is ambiguous
    at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
    at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    at java.lang.reflect.Constructor.newInstance(Constructor.java:423)
    at com.mysql.jdbc.Util.handleNewInstance(Util.java:425)
   

2.错误原因

 

 

 

3.解决方法

在where条件中字段前加上表的别名,比如a.id,b.id等等