使用 CAST 函数将 STRING 转为 BIGINT:
SELECT CAST('00321' AS BIGINT) FROM table;
As a BIGINT it will show on the screen and in delimited text files as 321.
参考：Hive - Converting a string to bigint
补充知识：hive中bigint和varchar字段做关联，关联数据错误的解决方法
把bigint和varchar都隐式转换成String类型的就可以关联出正确的结果了
cast(t1.PARTY_NUM as string)=cast(t12.customerId as string)
以上这篇hive中将string数据转为bigint的操作就是小编分享给大家的全部内容了，希望能给大家一个参考，也希望大家多多支持猪先飞。