How to delete data in an Oracle table

a grammar

DELETE FROM table_name

[WHERE conditions]

Two examples

1. Unconditional deletion

1. SQL> create table testdel
2. 2as
3. 3select*from userinfo;
5. 表已创建。
7. SQL>deletefrom testdel;
9. 已删除4行。
11. SQL>select*from testdel;
13. 未选定行

2. Conditional deletion

1. SQL>delete userinfo where username='yyy';
3. 已删除1行。
6. SQL>select username from userinfo;
8. USERNAME
9. --------------------
10. xxx