SQL CASE和WHER并加入

Question

我写这样

"SELECT (
    CASE WHEN (1.00 - sys_pay.org_rate)*trans.txn_amt as agent_pay_current 
    < (trans.txn_amt - sys_pay.org_rate_limit) as agent_pay_max 
    THEN agent_pay_max 
    ELSE agent_pay_current END), 
    FROM sys_org 
    INNER JOIN trans ON sys_org.mid = trans.mid 
    INNER JOIN sys_pay ON sys_pay.mid = sys_org.mid 
    ORDER BY txn_date DESC limit 10" 

一个SQL它说我在SQL语法错误，如何使这正确吗？

Answer 1

尝试这样，

"SELECT (
      CASE 
       WHEN ((1.00 - sys_pay.org_rate) * trans.txn_amt) < (trans.txn_amt - sys_pay.org_rate_limit) THEN 
        agent_pay_max 
       ELSE agent_pay_current 
      END 
     ) 
FROM sys_org 
     INNER JOIN trans 
      ON sys_org.mid = trans.mid 
     INNER JOIN sys_pay 
      ON sys_pay.mid = sys_org.mid 
ORDER BY 
     txn_date DESC" 

OR

"SELECT (
      CASE 
       WHEN ((1.00 - sys_pay.org_rate) * trans.txn_amt) < (trans.txn_amt - sys_pay.org_rate_limit) THEN (trans.txn_amt - sys_pay.org_rate_limit) 
       ELSE ((1.00 - sys_pay.org_rate) * trans.txn_amt) 
      END 
     )   agent_pay_return 
FROM sys_org 
     INNER JOIN trans 
      ON sys_org.mid = trans.mid 
     INNER JOIN sys_pay 
      ON sys_pay.mid = sys_org.mid 
ORDER BY 
     txn_date  DESC" 

agent_pay_return将返回值按情况进行检查。

Answer 2

MS SQL服务器的限制就是这样

"SELECT TOP 10 (
    CASE WHEN (1.00 - sys_pay.org_rate)*trans.txn_amt as agent_pay_current 
    < (trans.txn_amt - sys_pay.org_rate_limit) as agent_pay_max 
    THEN agent_pay_max 
    ELSE agent_pay_current END) 
    FROM sys_org 
    INNER JOIN trans ON sys_org.mid = trans.mid 
    INNER JOIN sys_pay ON sys_pay.mid = sys_org.mid 
    ORDER BY txn_date DESC" 

而且从之前删除逗号。感谢@rajeshmpanchal

还没有发现另一个问题。