PL SQL遍历ID列表

Question

我有一个名字清单。

约翰，山姆，彼得，杰克

我想查询与上面的每个过滤器相同的SQL。每个查询都会给我一个唯一的员工ID，我想用它删除其他一些记录。

select emp_id from employee where emp_name like '%john%';

假设第一个查询的ID为1001。因此删除查询如下。

delete from account_details where emp_id = 1001;
delete from hr_details where emp_id = 1001;
delete from pay_role_details where emp_id = 1001;

对于员工列表，我必须重复此操作。伪代码如下所示。

var emp_list = ['john', 'jack', 'kate', 'peter', 'sam',...]

for each :employee_name in emp_list
    select emp_id as :var_emp_id from employee where emp_name like '%:employee_name%'; 

    delete from account_details where emp_id = :var_emp_id;
    delete from hr_details where emp_id = :var_emp_id;
    delete from pay_role_details where emp_id = :var_emp_id;
end loop

我想要一个PL-SQL查询来执行此操作。请帮忙。谢谢。

我尝试的是类似以下内容的东西。

set serveroutput on;
begin
loop x in ('john','jack', 'kate') loop as :name
  select emp_id as var_emp_id from employee where emp_name like '%:name%';
  // delete queries  
end loop;
end;

PS尽管根据问题，例如查询可能会导致多条记录，但在实际情况下，保证只有一条记录。在实际情况下，为什么要使用like，它是参考数字而不是名称的列表。参考编号有其他一些前置文本和后置文本，而我的逗号分隔列表仅包含这些数字。

Answer 1

也许以下方法会有所帮助：

BEGIN
  FOR aName IN (SELECT 'john'  AS EMP_NAME FROM DUAL
                UNION ALL
                SELECT 'sam'   AS EMP_NAME FROM DUAL
                UNION ALL
                SELECT 'peter' AS EMP_NAME FROM DUAL
                UNION ALL
                SELECT 'jack'  AS EMP_NAME FROM DUAL)
  LOOP
    FOR emp IN (SELECT * FROM EMPLOYEE WHERE EMP_NAME LIKE '%' || aName.EMP_NAME || '%')
    LOOP
      DELETE FROM ACCOUNT_DETAILS a WHERE a.EMP_ID = emp.EMP_ID;
      DELETE FROM HR_DETAILS h WHERE h.EMP_ID = emp.EMP_ID;
      DELETE FROM PAY_ROLE_DETAILS p WHERE p.EMP_ID = emp.EMP_ID;

      DBMS_OUTPUT.PUT_LINE('Deleted data for employee with EMP_ID=' || emp.EMP_ID);
    END LOOP;  -- emp
  END LOOP; -- aName
END;

对此进行研究，直到您了解其工作方式和原因。

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