如何使用 hive sql 中不存在

Question

I am new to hive sql.It does not support "not exist in" function.

How we can achieve that

If my tables "T1" has values a,b,c,d,e and table*"T2"* has z,b,g,d,e

my expected output was a,c .

Answer 1

We can use LEFT JOIN :

SELECT t1.columnName
FROM t1
LEFT OUTER JOIN t2
ON (t1.columnName = t2.columnName)
WHERE t2.columnName IS NULL