oracle中as的用法?
SELECT t1.CON_ID,t1.CON_TYPE,t1.CON_NUMBER,t1.CON_NAME,t1.CON_DATE, t2.CUS_NAME as CON_CUSTOMER,t1.CON_REMARKS,
t1.CON_FILES,t1.CON_STATUS from CON_CONTRACT as t1 left join CUS_CUSTOMER as t2 on t1.CON_CUSTOMER=t2.CUS_ID where 1=1
为什么 from CON_CONTRACT as t1 left join CUS_CUSTOMER as t2 这两个as会报错