Oracle中多表关联批量插入批量更新与批量删除操作

--创建部门表 dept:CREATE TABLE dept( deptno NUMBER(2) CONSTRAINT PK_DEPT PRIMARY KEY, dname VARCHAR2(14) , loc VARCHAR2(13) ,  CREATEDTIME DATE,  UPDATEDTIME DATE,  CREATEDBY NUMBER(7,0),  UPDATEDBY NUMBER(7,0)) ;--创建员工表 emp:CREATE TABLE emp(  empno NUMBER(4) CONSTRAINT PK_EMP PRIMARY KEY,  ename VARCHAR2(10),  job VARCHAR2(15),  mgr NUMBER(4),  hiredate DATE,  sal NUMBER(7,2),  comm NUMBER(7,2),  deptno NUMBER(2) CONSTRAINT FK_DEPTNO REFERENCES DEPT,   CREATEDTIME DATE,   UPDATEDTIME DATE,   CREATEDBY NUMBER(7,0),   UPDATEDBY NUMBER(7,0));--创建员工表 emp_copy:CREATE TABLE emp_copy(  empno NUMBER(4),  ename VARCHAR2(10),  job VARCHAR2(15),  mgr NUMBER(4),  hiredate DATE,  sal NUMBER(7,2),  comm NUMBER(7,2),  deptno NUMBER(2),   CREATEDTIME DATE,   UPDATEDTIME DATE,   CREATEDBY NUMBER(7,0),   UPDATEDBY NUMBER(7,0) );--自定义一个序列  create sequence emp_sequence    increment by 1 --每次增加几个，我这里是每次增加1     start with 1  --从1开始计数     nomaxvalue   --不设置最大值     nocycle     --一直累加，不循环     nocache    --不建缓冲区 --插入dept表数据:INSERT INTO dept VALUES(10,'ACCOUNTING','NEW YORK',sysdate,sysdate,123123,123123);INSERT INTO dept VALUES (20,'RESEARCH','DALLAS',sysdate,sysdate,123123,123123);INSERT INTO dept VALUES(30,'SALES','CHICAGO',SYSDATE,SYSDATE,123123,123123);INSERT INTO dept VALUES(40,'OPERATIONS','BOSTON',sysdate,sysdate,123123,123123);--插入emp表数据:INSERT INTO emp VALUES(7369,'SMITH','CLERK',7902,to_date('17-12-1980','dd-mm-yyyy'),800,NULL,20,sysdate,sysdate,123123,123123);INSERT INTO emp VALUES(7499,'ALLEN','SALESMAN',7698,to_date('20-2-1981','dd-mm-yyyy'),1600,300,30,sysdate,sysdate,123123,123123);INSERT INTO emp VALUES(7521,'WARD','SALESMAN',7698,to_date('22-2-1981','dd-mm-yyyy'),1250,500,30,SYSDATE,SYSDATE,123123,123123);INSERT INTO emp VALUES(7566,'JONES','MANAGER',7839,to_date('2-4-1981','dd-mm-yyyy'),2975,NULL,20,sysdate,sysdate,123123,123123);INSERT INTO emp VALUES(7654,'MARTIN','SALESMAN',7698,to_date('28-9-1981','dd-mm-yyyy'),1250,1400,30,SYSDATE,SYSDATE,123123,123123);INSERT INTO emp VALUES(7698,'BLAKE','MANAGER',7839,to_date('1-5-1981','dd-mm-yyyy'),2850,NULL,30,sysdate,sysdate,123123,123123);INSERT INTO emp VALUES(7782,'CLARK','MANAGER',7839,to_date('9-6-1981','dd-mm-yyyy'),2450,NULL,10,SYSDATE,SYSDATE,123123,123123);INSERT INTO emp VALUES(7788,'SCOTT','ANALYST',7566,to_date('19-4-87','dd-mm-yyyy'),3000,NULL,20,SYSDATE,SYSDATE,123123,123123);INSERT INTO emp VALUES(7839,'KING','PRESIDENT',NULL,to_date('17-11-1981','dd-mm-yyyy'),5000,NULL,10,sysdate,sysdate,123123,123123);INSERT INTO emp VALUES(7844,'TURNER','SALESMAN',7698,to_date('8-9-1981','dd-mm-yyyy'),1500,0,30,SYSDATE,SYSDATE,123123,123123);INSERT INTO emp VALUES(7876,'ADAMS','CLERK',7788,to_date('23-5-87','dd-mm-yyyy'),1100,NULL,20,sysdate,sysdate,123123,123123);INSERT INTO emp VALUES(7900,'JAMES','CLERK',7698,to_date('3-12-1981','dd-mm-yyyy'),950,NULL,30,sysdate,sysdate,123123,123123);INSERT INTO emp VALUES(7902,'FORD','ANALYST',7566,to_date('3-12-1981','dd-mm-yyyy'),3000,NULL,20,SYSDATE,SYSDATE,123123,123123);INSERT INTO emp VALUES(7934,'MILLER','CLERK',7782,to_date('23-1-1982','dd-mm-yyyy'),1300,NULL,10,sysdate,sysdate,123123,123123);

INSERT INTO emp_copySELECT emp_sequence.nextVal,C.* FROM (  SELECT   e.ename ,  e.JOB ,  e.mgr ,  e.hiredate,  e.sal ,  e.comm ,  e.deptno,  SYSDATE AS CREATEDTIME,  SYSDATE AS UPDATEDTIME,  123124 AS CREATEDBY,  123124 as UPDATEDBY  FROM emp e, dept d  WHERE e.deptno = d.deptno  AND d.loc='CHICAGO'  and e.sal>=1500  )C;

MERGE INTO emp e USING  (  SELECT e1.job, e1.ename,e1.comm FROM emp e1, dept d1  WHERE e1.deptno = d1.deptno  AND d1.loc='CHICAGO'  and e1.job='SALESMAN' )t  ON (  e.job = t.job and e.ename = t.ename ) WHEN MATCHED THEN  UPDATE    set e.comm= t.comm+200

DELETE FROM( SELECT c.* FROM emp c,dept d WHERE d.deptno = c.deptno AND d.loc = 'CHICAGO' and c.sal < 1500);