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Oracle modifies field type and length

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Oracle Modify Field names

ALTER TABLE name rename column Old field name to new field name

Oracle modifies field type and length 

ALTER TABLE name modify field name data type

If you modify the data type such as modified by VARCHAR2 to int and the field has values, the following error will be reported


Workaround Reference : http://blog.csdn.net/itmyhome1990/article/details/8681206


Reprint Please specify source: http://blog.csdn.net/itmyhome1990/article/details/38869647


Oracle modifies field type and length

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