更改mysql中列的数据类型

代码示例

alter table添加列

ALTER TABLE table
ADD COLUMN column VARCHAR (255) NOT NULL AFTER column;

sql server alter列

ALTER TABLE table_name 
ALTER COLUMN column_name new_data_type(size);

alter table添加列

ALTER TABLE table_name 
ADD column_name datatype;

alter table column将数据类型更改为text mysql

ALTER TABLE tablename MODIFY columnname INTEGER;

在mysql中更改数据类型

ALTER TABLE table_name

CHANGE COLUMN column_name column_name datatype;

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empty row

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