Question

使用pl sql过程从临时表插入到单独的表中如何使用if语句检查记录是否重复

如果它不存在则插入
如果确实存在，则在消息中显示副本（dbms_output.put_line）并继续循环显示其他记录

临时表：

create table temp_table
(job title varchar2(20)
,empname varchar2(30));

我有一张job_id的工作表，job_title 我有一张包含empid，empname，jobid

Answer 1

您想要的PLSQL块如下所示。

<强> 表：

CREATE  TABLE temp_table (
job_title  VARCHAR2(20),
empname varchar2(30));

--------------------------

CREATE  TABLE job (
job_id number,
job_title  VARCHAR2(20));

------------------------------

CREATE  TABLE emplyee (
empid number, 
empname varchar2(30),
job_id number
);

------------------------------
INSERT INTO temp_table VALUES ( 'Dan', 'Morgan');
INSERT INTO temp_table VALUES ( 'Helen', 'Lofstrom');
INSERT INTO temp_table VALUES ( 'Akiko', 'Toyota' );
INSERT INTO temp_table VALUES ( 'Jackie', 'Stough');
INSERT INTO temp_table VALUES ( 'Richard', 'Foote');
INSERT INTO temp_table VALUES ( 'Joe', 'Johnson');
INSERT INTO temp_table VALUES ( 'Clark', 'Urling');

-------------------------
create  sequence seq_id start with 1 increment by 1 nocycle;
-----------------

PL SQL Block

  declare

     dummy integer;
     jb_id number;
     ep_id  number;
     job_cntr number:=0;
     emp_cntr number:=0;
    begin

    for rec in (select * from temp_table)
     loop

        jb_id:= seq_id.nextval*101;
        ep_id:= seq_id.nextval;
       ---Test if row exists before inserting
        select count(*) 
        into dummy
        from  job jb
        where jb.job_title = rec.job_title;

        if dummy = 0 then     
         insert into  job(job_id,job_title) values (jb_id,rec.job_title);
        else     
         --dbms_output.put_line('Duplicate record in Job table.!!! Records Exis-'||rec.job_title);
          job_cntr:=job_cntr + 1 ;
        end if;     

      ---Test if row exists before inserting
        select count(*) 
        into dummy
        from  emplyee emp
        where emp.empname = rec.empname;

        if dummy = 0 then     
         insert into  emplyee(empid,empname,job_id) values (ep_id,rec.empname,jb_id);
         else     
         --dbms_output.put_line('Duplicate record in Employee..!!! Records Exis-'||rec.empname);
          emp_cntr := emp_cntr + 1;
        end if;

     end loop;

      commit;

      dbms_output.put_line('Duplicate record in Job table-'||job_cntr || ' Duplicate record in Employee.' ||emp_cntr );

    end;
--

<强> 测试：

select * from job;
select * from emplyee;

plsql - 用于查看记录是否已存在的游标

1 个答案: