How to modify field name in mysql

Mysql method to modify field names: execute the [ALTER TABLE table name CHANGE old field name new field name new data type;] statement to modify the field name.

mysql modify field name:

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ALTER  TABLE 表名 CHANGE 旧字段名 新字段名 新数据类型;   
 alter  table table1 change column1 column1 varchar(100) DEFAULT 1.2 COMMENT '注释'; -- 正常，此时字段名称没有改变，能修改字段类型、类型长度、默认值、注释  
alter  table table1 change column1 column2 decimal(10,1) DEFAULT NULL COMMENT '注释' -- 正常，能修改字段名、字段类型、类型长度、默认值、注释  
alter  table table1 change column2 column1 decimal(10,1) DEFAULT NULL COMMENT '注释' -- 正常，能修改字段名、字段类型、类型长度、默认值、注释  
alter  table table1 change column1 column2; -- 报错

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