MySQL [错误] 1064

Question

当我在 Navicat 的 VIEWS 表上运行 EXPLAIN 时，我得到了这个 MySQL 错误 1064，并且无法弄清楚这个简短代码中的错误究竟来自哪里：

SET @runningbal = 0;
SELECT
cashinflow_v.TxnDate,
cashinflow_v.TxnType,
cashinflow_v.Amount,    
@runningbal := @runningbal + cashinflow_v.Amount as Balance
FROM
cashinflow_v
ORDER BY cashinflow_v.TxnDate

错误提示：

[SQL] EXPLAIN SET @runningbal = 0;
SELECT
cashinflow_v.TxnDate,
cashinflow_v.TxnType,
cashinflow_v.Amount,
@runningbal := @runningbal + cashinflow_v.Amount as Balance
FROM
cashinflow_v
ORDER BY cashinflow_v.TxnDate

[Err] 1064 - You have an error in your SQL syntax; check the manual that 
corresponds to your MySQL server version for the right syntax to use near 'SET 
@runningbal = 0;
SELECT
cashinflow_v.TxnDate,
cashinflow_v.TxnType,
cash' at line 1

如果有人可以帮助我，我将不胜感激。谢谢！

Answer 1

变化：

来自：

EXPLAIN SET @runningbal = 0;

到

 SET @runningbal = 0;

Answer 2

EXPLAIN statement 需要表名或以下类型之一的查询：

• 选择
• 删除
• 插入
• 替换
• 更新

它的设计目的不是提供任意 SQL 命令的信息（怎么可能？）。

如果是您的 SQL 客户端试图解释查询，您可能需要指示它将代码块作为脚本而不是单独的语句来处理。