delete from system.table1与truncate table system.table1区别是什么？
delete from system.table1与truncate table system.table1区别是什么？
相关考题：
（ 28 ）假设 “ 图书 ” 表中有 C 型字段 “ 图书编号 ” ，要求将图书编号以字母 A 开头的图书记录 全部打上删除标记，可以使用 SQL 命令A ） DELETE FROM 图书 FOR 图书编号 =''A"B ） DELETE FROM 图书 WHERE 图书编号 = " A% "C ） DELETE FROM 图书 FOR 图书编号 ="A * "D ） DELETE FROM 图书 WHERE 图书编号 LIKE "A%"
从订单表中删除客户号为"1001”的订单记录，正确的SQL语句是A）DROP FROM订单WHERE客户号="1001"B）DROP FROM订单FOR客户号="1001"C）DELETE FROM订单WHERE客户号="1001"D）DELETE FROM订单FOR客户号="1001"
25) “ 图书 ” 表中有字符型字段 “ 图书号 ” 。要求用 SQL DELETE 命令将图书号以字母 A 开头的图书记录全部打上删除标记，正确的命令是A)DELETE FROM 图书 FOR 图书号 LIKE " A % "B)DELETE FROM 图书 WHILE 图书号 LIKE " A % "C)DELETE FROM 图书 WHERE 图书号 = " A* "D)DELETE FROM 图书 WHERE 图书号 LIKE " A% "
以下删除记录正确的( )A.delete from emp where name='dony';B.Delete * from emp where name='dony';C.Drop from emp where name='dony';D.Drop * from emp where name='dony';
根据SQL标准，要删除表student中所有数据，但不将表student的定义一起删除，下面哪个语句可以适用?()A delete from studentB delete all from studentC delete * from studentD drop table student
"图书"表中有字符型字段“图书号”。要求用SQL DELETE命令将图书号以字母A开头的图书记录全部打上删除标记，正确的命令是（ ）。A. DELETE FROM图书FOR图书号LIKE”A%”B. DELETE FROM图书WHILE图书号LIKE”A%”C. DELETE FROM图书WHERE图书号=”A%”D. DELETE FROM图书WHERE图书号LIKE”A%”
使用SQL语句将表s中字段price的值大于30的记录删除，正确的命令是（ ）。A.DELETE FROM S FOR price30B.DELETE FROM sWHERE price30C.DELETE S FOR pricC30D.DELETE S WHERE pricC30
Which of the following will DELETE all of the rows from table T03?() A.DELETE * FROM TABLE T03B.DELETE ALL FROM T03C.DELETE * FROM T03D.DELETE FROM T03
删除“持有数”表中所有外币名称为“法郎”的记录，下列SQL语句正确的是( )。A．DELETE FROM 持有数; WHERE 持有数.外币代码=外汇名.外币代码; AND 外币名称="法郎"B．DELETE FROM 持有数,外汇名; WHERE 持有数.外币代码=外汇名.外币代码; AND 外币名称="法郎"C．DELETE FROM 持有数 WHERE 外币代码 IN; (SELECT 外币代码 FROM 外汇名 WHERE 外币名称="法郎")D．DELETE FROM 持有数 WHERE 外币代码 IN; SELECT 外币代码 FROM 外汇名 WHERE 外币名称="法郎"
使用SQL语句将表S中字段price的值大于30的记录删除，正确的命令是A．DELETE FROM s FOR price30B．DELETE FROM s WHERE price30C．DELETE s FOR price30D．DELETE s WHERE price30
下列执行数据的删除语句在运行时不会产生错误信息的是( )。 A delete * from A where B=‘6’B delete * from A where B=‘6’C delete A where B=6D delete A set where B=‘6’
请问oracle的整表删除操作（）是正确的。A、truncate table tablenameB、delete from tablenameC、delete*from tablenameD、以上都不对
ORACLE数据库中如何删除表table中的所有记录，并回收所有空间（）A、delete * from tableB、delete from tableC、truncate tableD、clear table
Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2 (25) LAST_NAME VARCHAR2 (25) HIRE_DATE DATE NEW EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE statement is valid? （）A、DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);B、DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);C、DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = ('Carrey')'D、DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE last_ name = ('Carrey')'
在Access中，删除"订单"表中所有记录，应运行的SQL命令是（）A、delete*from"订单"B、delete*from订单C、delete*from"订单ID"D、delete*from订单ID
删除emp表的全部数据，但不提交，以下正确的语句是（）A、DELETE * FROM. EMPB、DELETE FROM EMPC、TRUNCATE TABLE EMPD、DELETE TABLE EMP"
若要删除book表中所有数据，以下语句错误的是（）A、truncate table bookB、delete * from bookC、drop table bookD、delete from book
删除“职工”表中没有写入工资的记录，应该使用的命令是（）。A、DELETE FROM职工WHERE工资=NULLB、DELETE FROM职工WHERE工资=!NULLC、DELETE FROM职工WHERE工资IS NOT NULL
可以删除学生表中学号为‘s2008005’的是（）。A、"begin tran delete from学生表where学号=‘s2008005’ rollback"B、"begin tran delete from学生表where学号=‘s2008005’ commit"C、"begin tran delete where学号=‘s2008005’ from 学生表 rollback"D、"begin tran delete where学号=‘s2008005’ commit"
设关系数据库中一个表S的结构为：S（SN，CN，grade），其中SN为学生名，CN为课程名，均为字符型；grade为成绩，数值型，下列（）选项是正确的。A、DELETE FROM S WHERE SN=’JULIE’B、DELETE*FROM S WHERE SN=’JULIE’C、DELETE FROM S WHERE SN="JULIE"D、DELETE*FROM S WHERE SN="JULIE"
删除表Teacher中编号为070041的记录，应为（）A、DELETE FROM Teacher WHERE编号="070041"B、DELETE FROM Teacher 编号="070041"C、DELETE编号="070041"FROMTeacherD、DELETE FROM Teacher WHERE编号IS"070041"
Which of the following statements is used to prevent user TOM from adding and deleting data in table TAB1?（）A、REVOKE ADD, DELETE FROM USER tom ON TABLE tab1B、REVOKE ADD, DELETE ON TABLE tab1 FROM USER tomC、REVOKE INSERT, DELETE FROM USER tom ON TABLE tab1D、REVOKE INSERT, DELETE ON TABLE tab1 FROM USER tom
Which of the following will DELETE all of the rows from table T03?（）A、DELETE * FROM TABLE T03B、DELETE ALL FROM T03C、DELETE * FROM T03D、DELETE FROM T03
Examine the structure of the EMPLOYEES and NEW_EMPLOYEES tables: EMPLOYEES EMPLOYEE_ID NUMBER Primary Key FIRST_NAME VARCHAR2(25) LAST_NAME VARCHAR2(25) HIRE_DATE DATE NEW_EMPLOYEES EMPLOYEE_ID NUMBER Primary Key NAME VARCHAR2 (60) Which DELETE statement is valid?（）A、DELETE FROM employees WHERE employee_id = (SELECT employee_id FROM employees);B、DELETE * FROM employees WHERE employee_id = (SELECT employee_id FROM new_ employees);C、DELETE FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey');D、DELETE * FROM employees WHERE employee_id IN (SELECT employee_id FROM new_employees WHERE name = 'carrey');
单选题可以删除学生表中学号为‘s2008005’的是（）。Abegin tran delete from学生表where学号=‘s2008005’ rollbackBbegin tran delete from学生表where学号=‘s2008005’ commitCbegin tran delete where学号=‘s2008005’ from 学生表 rollbackDbegin tran delete where学号=‘s2008005’ commit