sql判断
比如 SELECT ${SWITCH("true",类型='年',"year(日期字段)",类型='月',"left(日期字段,7)"....................)} 'new',.............. FROM TABLE WHERE 1=1 ${SWITCH("true",类型='年'," AND year(日期字段)='"+YEAR(TODAY())+"'",类型='月',"日期字段>='"+dateinyear(today(),1)+"' and 日期字段<='"+dateinyear(today(),-1)+"'"....................)}