MySQL 子查询错误代码 1241 SQLState 21000

Question

I want to retrieve First and Last Row using client_id from my table. So I wrote this which threw an error (1241), Can Anyone please tell me what this issue with this code:

SELECT * 
FROM invoices 
WHERE invoice_id IN (SELECT  MAX(invoice_id), 
                             MIN(invoice_id) 
                     FROM invoices
                     );

WHERE AS this code is perfectly fine:

SELECT * 
FROM invoices 
WHERE invoice_id IN (SELECT  MIN(invoice_id) 
                     FROM invoices 
                     UNION SELECT MAX(invoice_id) 
                     FROM invoices
                    );

Answer 1

So I wrote this which threw an error (1241), Can Anyone please tell me what this issue with this code:

The error MySQL error 1241: Operand should contain 1 column(s) occurred because the following query

SELECT  MAX(invoice_id), MIN(invoice_id) FROM invoices  

returns two columns, not two values. In the where condition you have one column declared WHERE invoice_id IN .