Use the TRUNCATE TABLE command (deletes only the data inside the table): 当我们只想将表内的数据做完成清楚而保留其内部结构的话,可以使用TRUNCATE TABLE命令(仅仅删除表中的数据) TRUNCATE TABLE table_name
In MySQL it is pretty easy to drop a table if it exists already. In Oracle and Microsoft’s SQL Server it is a little more complicated. Today I want to present you the solutions for these two DBMS’. MySQL: DROP TABLE IF EXISTS [table_name] Oracle: BEGIN EXECUTE IMMEDIATE 'DROP TABLE...
mkdir -p $ORACLE_BASE/diag/rdbms/$ORACLE_SID/$ORACLE_SID/incident mkdir -p $ORACLE_BASE/diag/rdbms/$ORACLE_SID/$ORACLE_SID/incpkg mkdir -p $ORACLE_BASE/diag/rdbms/$ORACLE_SID/$ORACLE_SID/ir mkdir -p $ORACLE_BASE/diag/rdbms/$ORACLE_SID/$ORACLE_SID/lck mkdir -p $ORACLE_BASE/diag/...
Rows in temporary tables are private to your session. Only you can view them. And, once you disconnect, the database removes any rows you added.Oracle Database has two types of temporary table: global (GTT) and private (PTT).Global Temporary Tables (GTT)The syntax to create a globa...
sql-> drop table foo; Error handling command drop table foo: Error: User error in query: DROP TABLE failed for table foo: Table does not exist: foo IF EXISTSを指定し、表が存在する場合は、DROP文が正常に実行されます。 コピー sql-> create table foo (first string, second integer, primar...
在oracle 数据库下,在启用审计的数据库上执行下面的命令 SQL> AUDIT DROP ANY TABLE BY scott BY SESSION WHENEVER SUCCESSFUL; 有关此命令的影响描述正确的是? A. 每一个会话 drop 属于 scott 用户的表成功就会产生一条审计记录 B. 凡是每一个 scott 用户会话成功 drop table 操作,就会存在一条审计记录 C....
Oracle Database/ Release 23 SQL Language Reference Purpose Use theDROPTABLEstatement to move a table or object table to the recycle bin or to remove the table and all its data from the database entirely. Note: Unless you specify thePURGEclause, theDROPTABLEstatement does not result in space...
【PL/SQL】三种删除方式 Delete,Truncate,Drop 看完这章你会学习到以下内容: 它们的共同点 它们的不同点 相同点: 它们都可以删除数据,清理那些无关紧要,与业务无关的数据。 不同点: 1.语句方面 delete语句是dml,这个操作会放到rollback segement中,事务提交之后才生效;如果有相应的trigger,执行的时候将被触发....
The DROP TABLE command deletes a table in the database.The following SQL deletes the table "Shippers":Example DROP TABLE Shippers; Note: Be careful before deleting a table. Deleting a table results in loss of all information stored in the table!
Oracle Database - Enterprise Edition - Version 10.2.0.1 and later: ORA-02449: unique/primary keys in table referenced by foreign keys when drop tablespace