mysql - 替换 INTERSECT 以与 phpmyadmin 一起使用

Question

我对 SQL 和 phpmyadmin 相当陌生，但在我的查询中，我在相交时遇到错误，我想知道如何更改它，以便它打印我的表。

SELECT cust_code, cust_fname, cust_lname FROM lgcustomer join lginvoice         
USING (cust_code) WHERE employee_id = 83649

INTERSECT

SELECT cust_code, cust_fname, cust_lname FROM lgcustomer join lginvoice      
USING (cust_code) WHERE employee_id = 83677

ORDER BY cust_lname, cust_fname;

Answer 1

INTERSECT 运算符在 MySQL 中不可用。在这种情况下，您可以使用 EXISTS:

SELECT c1.cust_code, c1.cust_fname, c1.cust_lname 
FROM lgcustomer as c1
JOIN lginvoice         
USING (cust_code) 
WHERE employee_id = 83649 AND 
      EXISTS (SELECT 1
              FROM lgcustomer as c2
              join lginvoice      
              USING (cust_code) 
              WHERE employee_id = 83677 and 
                    c1.cust_code = c2.cust_code and 
                    c1.cust_fname = c2.cust_fname and 
                    c1.cust_lname = c2.cust_lname)