排查下列MySQL语句的错误以下是定义列的代码value INT UNSIGNED AS questions + answered VIRTUAL;以下是触发器中的代码DECLARE value INT;SELECT value INTO value FROM CommunityMember WHERE member = NEWanswerer AND community = NEWcommuni

错误原因：

1. 在定义列的语句中，AS后应该是一个表达式而不是一个子查询；
2. 在触发器中，DECLARE语句应该放在BEGIN语句之前。

以下是修改后的代码：

定义列的代码：

value INT UNSIGNED AS (questions + answered) VIRTUAL;

触发器中的代码：

BEGIN DECLARE v INT; SELECT value INTO v FROM CommunityMember WHERE member = NEW.answerer AND community = NEW.community; SET NEW.value = v; END;