How to modify table field name in oracle

Oracle's method to modify the table field name is:

The first method is to use the RENAME keyword:

Modify the field Name:

alter table 表名 rename column 现列zhi名 to 新列名;

Modify table name:

alter table 表名 rename to 新表dao名

Add field syntax:

alter table tablename add (column datatype [default value][null/not null],….);

Description:

alter table 表名 add (字段名 字段类型 默认值 是否为空);

Example:

alter table sf_users add (HeadPIC blob);

Example :

alter table sf_users add (userName varchar2(30) default '空' not null);

Syntax for modifying fields:

alter table tablename modify (column datatype [default value][null/not null],….);

Description:

alter table 表名 modify (字段名 字段类型 默认值 是否为空);

Example:

alter table sf_InvoiceApply modify (BILLCODE number(4));

Syntax for deleting fields:

alter table tablename drop (column);

Description:

alter table 表名 drop column 字段名;

Example:

alter table sf_users drop column HeadPIC;

Renaming of fields:

Description:

alter table 表名 rename  column  列名 to 新列名   （其中：column是关键字）

Example:

alter table sf_InvoiceApply rename column PIC to NEWPIC;

Renaming of table Naming:

Description:

alter table 表名 rename to  新表名

Example:

alter table sf_InvoiceApply rename to  sf_New_InvoiceApply;

Recommended tutorial: "Oracle Tutorial"

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