select fields=(case fields when 'A' then '一' when 'B' then '二' when 'C' then '三' when '一' then 'A' when '二' then 'B' when '三' then 'C' else fields end) from tablename 有唯一约束的话就这样写吧,没有唯一约束这语句就不行了
select fields=(case fields when 'A' then '一' when 'B' then '二' when 'C' then '三' when '一' then 'A' when '二' then 'B' when '三' then 'C' else fields end) from tablename