Oracle changes table structure

Modify the table name:

  alter table table name rename to new name

  Add fields:

alter table table name add field name field type

  Delete fields:

alter table table name drop column field name

  Modify fields:

alter table table name rename column original field name to new name;

  Modify the field type (premise: there is no data in the table)

alter table table name modify field name new type;
例如:String deleteColumn="alter table t_user drop column sname";