// TRUNCATE// 默认规范配置// innodb_flush_method = on & innodb_flush_method = O_DIRECT(root@127.1)[eolbimsdb]08:44:4615>truncate table t5;QueryOK,0rowsaffected(0.98sec)// 设置 innodb_adaptive_hash_index = off(root@127.1)[eolbimsdb]08:52:035>truncate table t5;QueryOK,0rowsaffected(0...
例1 新建表 tb_student_course,插入数据并查询,SQL 语句和运行结果如下: mysql>CREATE TABLE `tb_student_course` (-> `id`int(4) NOT NULL AUTO_INCREMENT,-> `name` varchar(25) NOT NULL,->PRIMARY KEY (`id`)->); Query OK,0rows affected (0.04sec) mysql> INSERT INTO tb_student_course(na...
Query OK, 0 rows affected (0.03 sec) // 设置 innodb_flush_method = fsync (root@127.1) [eolbimsdb] 09:03:34 28> truncate table t5; Query OK, 0 rows affected (1.04 sec) // 设置 innodb_adaptive_hash_index = off & innodb_flush_method = fsync (root@127.1) [eolbimsdb] 09:20:24 ...
适用于:Microsoft Fabric Microsoft Fabric SQL 数据库中的 SQL Server Azure SQL 数据库 Azure SQL 托管实例 Azure Synapse Analytics Analytics Platform System (PDW) Warehouse 删除表中的所有行或表中指定的分区,不记录单个行删除操作。 TRUNCATE TABLE与没有DELETE子句的WHERE语句类似;但是,速度更快,TRUNCATE ...
Query OK, 0 rows affected (0.98 sec) // 设置 innodb_adaptive_hash_index = off (root@127.1) [eolbimsdb] 08:52:03 5> truncate table t5; Query OK, 0 rows affected (0.03 sec) // 设置 innodb_flush_method = fsync (root@127.1) [eolbimsdb] 09:03:34 28> truncate table t5; ...
Query OK, 0 rows affected (0.03 sec) // 设置 innodb_flush_method = fsync (root@127.1) [eolbimsdb] 09:03:34 28> truncate table t5; Query OK, 0 rows affected (1.04 sec) // 设置 innodb_adaptive_hash_index = off & innodb_flush_method = fsync ...
在Oracle数据库中,你可以使用PL/SQL块来批量执行TRUNCATE TABLE命令,从而清空多个表的数据。 方法一:使用PL/SQL块 sql DECLARE cursor_table_names IS SELECT table_name FROM user_tables WHERE table_name IN ('TABLE1', 'TABLE2', 'TABLE3'); -- 指定你要清空的表名 BEGIN FOR table_rec IN cursor_ta...
obclient [OBORACLE]> alter table OBORACLE.F2 disable constraint FK_ID; Query OK, 0 rows affected (0.056 sec) 再次truncate 表操作。 obclient [OBORACLE]> truncate table f1; ORA-00600: internal error code, arguments: -5594, Cannot truncate a table referenced in a foreign key constraint (`...
Query OK, 0 rows affected (0.11 sec) INSERT INTO t1 VALUES (1),(2),(3),(4),(5); Query OK, 5 rows affected (0.01 sec) Records: 5 Duplicates: 0 Warnings: 0 SELECT * FROM t1; +---+ | a | +---+ | 1 | | 2 | | 3 | | 4 | | 5 | +---+ 5 rows in set...
新建表 tb_student_course,插入数据并查询,SQL 语句和运行结果如下: mysql> CREATE TABLE `tb_student_course` ( -> `id` int(4) NOT NULL AUTO_INCREMENT, -> `name` varchar(25) NOT NULL, -> PRIMARY KEY (`id`) -> ); Query OK, 0 rows affected (0.04 sec) ...