示例表及数据基于以下定义：

  2. Query OK, 0 rows affected (0.16 sec)
  3. obclient> select * from t1;
  4. +----+------+
  5. | c1 | c2   |
  6. +----+------+
  7. |  1 |    1 |
  8. |  2 |    2 |
  9. |  3 |    3 |
  10. |  4 |    4 |
  11. +----+------+
  12. 4 rows in set (0.06 sec)
  14. obclient> create table t2(c1 int primary key, c2 int) partition by key(c1) partitions 4;
  15. Query OK, 0 rows affected (0.19 sec)
  16. obclient> select * from t2;
  17. +----+------+
  18. | c1 | c2   |
  19. +----+------+
  20. |  5 |    5 |
  21. |  1 |    1 |
  22. |  2 |    2 |
  23. |  3 |    3 |
  24. +----+------+
  25. 4 rows in set (0.02 sec)
  • 单表删除：删除 “c1=2” 的行，其中 c1 列为表 t1 中的 Primary Key。
  1. obclient> DELETE FROM t1 WHERE c1 = 2;
  2. Query OK, 1 row affected (0.02 sec)
  4. +----+------+
  6. +----+------+
  7. |  1 |    1 |
  8. |  3 |    3 |
  9. |  4 |    4 |
  10. +----+------+
  11. 3 rows in set (0.01 sec)
  • 单表删除：删除表 t1 的按照 c2 列排序之后的第一行数据。
  • 单表删除：执行删除表 t2 的 p2 分区的数据。
  1. obclient> DELETE FROM t2 PARTITION(p2);
  2. Query OK, 3 rows affected (0.02 sec)
  4. obclient> select * from t2;
  5. +----+------+
  6. | c1 | c2   |
  7. +----+------+
  8. |  5 |    5 |
  9. +----+------+
  10. 1 row in set (0.02 sec)
  • 多表删除：删除 t1，t2 表中 “t1.c1 = t2.c1” 的数据。
  1. obclient> DELETE t1, t2 FROM t1, t2 WHERE t1.c1 = t2.c1;
  2. Query OK, 3 rows affected (0.02 sec)
  4. obclient> select * from t1;
  5. +----+------+
  6. | c1 | c2   |
  7. +----+------+
  8. |  4 |    4 |
  9. +----+------+
  10. 1 row in set (0.01 sec)
  12. obclient> select * from t2;
  14. +----+------+
  15. |  5 |    5 |
  16. +----+------+
  17. 1 row in set (0.01 sec)
  • 多表删除：删除 t1，t2 表中 “t1.c1 = t2.c1” 的数据。
  • 多表删除：删除 t2 表中的 p2 分区中和 t1 表中 “t1.c1 = t2.c1” 的数据。
  1. obclient> DELETE t2 FROM t1,t2 PARTITION(p2) WHERE t1.c1 = t2.c1;
  2. Query OK, 3 rows affected (0.02 sec)
  4. obclient> select * from t2;
  5. +----+------+
  6. | c1 | c2   |
  7. +----+------+
  8. |  5 |    5 |
  9. +----+------+
  10. 1 row in set (0.01 sec)
  • 对可更新视图 v 进行删除操作
  1. obclient> create view v as select * from t1;
  2. Query OK, 0 rows affected (0.07 sec)
  4. obclient> delete from v where v.c1 = 1;
  5. Query OK, 1 row affected (0.02 sec)
  7. obclient> select * from v;
  8. +----+------+
  9. | c1 | c2   |
  10. +----+------+
  11. |  2 |    2 |
  12. |  3 |    3 |
  13. |  4 |    4 |
  14. +----+------+
  15. 3 rows in set (0.01 sec)