通过ID列表的PL SQL循环

我有一张名单

约翰，萨姆，彼得，杰克

我想用上面的每一个作为过滤器查询相同的sql。每个查询都会给我一个唯一的员工id，我想用它来删除一些其他记录

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

假设对于第一个查询，我得到的id是1001。因此，删除查询如下所示

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;

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

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;

我必须对一份员工名单重复这一点。伪代码如下所示

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;

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

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;

我需要一个PL-SQL查询来实现这一点。请帮忙。谢谢

我所尝试的是如下所示

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;

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

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;

---

注意：尽管根据问题，如查询可能会导致多个记录，但在实际场景中，保证只有一个记录。我之所以使用like，是因为在实际场景中，它是一个参考号列表，而不是名称。参考号有一些其他的前文本和后文本，我的逗号分隔列表只有数字

使用PL/SQL游标选择要删除的所有ID，然后循环它，每次传递时发出delete语句

有关游标的详细信息可在此处找到：

有关动态SQL，请参见此处：

代码示例：

    PROCEDURE delete_stuff
    IS

    id AS NUMBER;

    CURSOR your_cursor IS
    SELECT emp_id FROM employee WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) > 0;

    OPEN your_cursor;
        LOOP
        FETCH your_cursor INTO id;
        EXIT WHEN your_cursor%NOTFOUND;

        EXECUTE IMMEDIATE 'DELETE FROM account_details WHERE emp_id = :id' USING id;
        EXECUTE IMMEDIATE 'DELETE FROM hr_details WHERE emp_id = :id' USING id;
        EXECUTE IMMEDIATE 'DELETE FROM pay_role_details WHERE emp_id = :id' USING id;

    CLOSE your_cursor;
    END LOOP;

    EXCEPTION 
    WHEN OTHERS THEN NULL;


END delete_stuff;

---

使用PL/SQL游标选择要删除的所有ID，然后循环它并在每次传递时发出delete语句

有关游标的详细信息可在此处找到：

有关动态SQL，请参见此处：

代码示例：

    PROCEDURE delete_stuff
    IS

    id AS NUMBER;

    CURSOR your_cursor IS
    SELECT emp_id FROM employee WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) > 0;

    OPEN your_cursor;
        LOOP
        FETCH your_cursor INTO id;
        EXIT WHEN your_cursor%NOTFOUND;

        EXECUTE IMMEDIATE 'DELETE FROM account_details WHERE emp_id = :id' USING id;
        EXECUTE IMMEDIATE 'DELETE FROM hr_details WHERE emp_id = :id' USING id;
        EXECUTE IMMEDIATE 'DELETE FROM pay_role_details WHERE emp_id = :id' USING id;

    CLOSE your_cursor;
    END LOOP;

    EXCEPTION 
    WHEN OTHERS THEN NULL;


END delete_stuff;

---

您真的需要一个光标来执行此操作吗？如果可能，请尝试跳过光标，以避免在处理大量数据时性能/内存使用不佳

delete from account_details inner join employee on account_details.emp_id = employee.emp_id where WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) >0;

delete from hr_details inner join employee on hr_details.emp_id = employee.emp_id where WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) >0;

delete from pay_role_details inner join employee on pay_role_details.emp_id = employee.emp_id where WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) >0;

---

您真的需要一个光标来执行此操作吗？如果可能，请尝试跳过光标，以避免在处理大量数据时性能/内存使用不佳

delete from account_details inner join employee on account_details.emp_id = employee.emp_id where WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) >0;

delete from hr_details inner join employee on hr_details.emp_id = employee.emp_id where WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) >0;

delete from pay_role_details inner join employee on pay_role_details.emp_id = employee.emp_id where WHERE CONTAINS(employee.emp_name, '"John" OR "Sam" OR "Max"', 1) >0;

---

或许以下几点会有所帮助：

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;

研究这一点，直到你了解它是如何工作的以及为什么工作

---

分享和享受。

也许以下几点会有所帮助：

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;

研究这一点，直到你了解它是如何工作的以及为什么工作

---

共享和享受。

当然，您不需要游标本身，但是，他特别要求使用PL/SQL过程，因此游标更适合这种情况。但和往常一样，每件事都有它的优点和缺点。同意他的标准是否更复杂，需要更多的逻辑来处理。当然，你不需要游标本身，但是，他特别要求一个PL/SQL过程，在这种情况下，游标更合适。但和往常一样，每件事都有它的优点和缺点。同意他的标准是否更复杂，需要更多的逻辑来处理。个人偏好。在你需要调整事情或者突然需要满足更复杂的需求的情况下，这是一种更通用的方式。个人偏好。在你需要调整事情或者突然需要满足更复杂的需求的情况下，它是一种更通用的方式。