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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