语法:
使用concat(param1,param2)
实例:select concat(‘张三’,‘好好学习’) as Str from student;
说明把张三和好好学习连接起来,结果给字段Str.
DELIVERYREQUIREMENTTYPE:到货日期类型
SELECT ID, CONTRACTNAME concat( concat(DeliveryRequirementType , TO_CHAR(DELIVERYREQUIREMENT1)),‘天’) FROM MAKECONTRACTS