truncate table 表名 清除表数据,保留表结构 insert into sm.dbo.duke select * from sm.dbo.duke 该语句为被插入的表要与插入的表数据结构保持一致(最好清除该表与 truncate 配合使用)
Truncate Table 2015-03-05 11:50 −Truncate是一个能够快速清空资料表内所有资料的SQL语法。并且能针对具有自动递增值的字段,做计数重置归零重新计算的作用。 TRUNCATE TABLE 在功能上与不带 WHERE 子句的 DELETE 语句相同:二者均删除表中的全部行。但 TRUNCATE TABLE 比 DELETE 速度快... ...
TRUNCATE [TABLE] table_name; 或 ALTER TABLE [IF EXISTS] table_name TRUNCATE PARTITION { partition_name | FOR ( partition_value [, ...] ) } 参数:table_name:需要删除数据的Table名称。partition_name:需要删除的分区表的分区名称。partition_value:需要删除的分区表的分区值。 3、示例1 以下示例演示T...
MySQL5.6版本+ : 直接使用drop table On a systemwith a large InnoDBbuffer pooland innodb_adaptive_hash_index enabled, TRUNCATE TABLE operations may cause a temporary dropin system performance dueto an LRU scan that occurswhen removing an InnoDB table's adaptive hash index entries. The problem was ...
1TruncateTabletmpcontent MSSQL报错'Can not truncate table tmpcontent because it is being referenced by a foreign key constraint. 是由于外键FK限制了,于是找到度娘 方法有几 不过这里只提供最简单方便的一种 复制如下命令 替换相应参数 GO... 1Delete[資料表名稱]; ...
Adding an Attachment Column into an existing SQL Table Adding in a unique id via derived column. Adding SSIS will require downtime ? ADO NET Source has failed to acquire the connection {---} with the following error message: "Could not create a managed connection manager." Agent Job should...
Truncate table tblStudent Difference 2: Triggers When we run the DELETE command, the SQL Server invokes the DELETE triggers. I have created a trigger namedtrgdeleteStudentontblStudent. When we execute a DELETE statement on thetblstudenttable, the trigger inserts a record in atblDeletedStudenttab...
MariaDB 10.1 Truncate table cascade语法错误 当我尝试执行下面的sql statemant MariaDB时,给出一个错误: SQL: TRUNCATE $table CASCADE; SQLSTATE[42000]: Syntax error oraccess violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to yourMariaDB server version for...
TRUNCATE statement: This command is used to delete all the rows from the table and free the space containing the table.SQL DROP Statement:The SQL DROP command is used to remove an object from the database. If you drop a table, all the rows in the table is deleted and the table ...
truncate table DDMDemo go 此时在其他会话查询该表会被阻塞 回滚操作 rollback go 回到查询的会话,发现阻塞结束,且能查询出结果,回滚成功 如果在还没回滚的时候truncate会话被kill了会怎样? Kill 53 回到查询的会话,发现阻塞结束,且能查询出结果,说明truncate被回滚,也就是说sqlserver会话被kill的默认行为是回滚 ...