具有WHERE子句的DB2 SELECT EXCEPT

问题描述：

我正在尝试使用SPUFI提交SQL查询来比较z/OS中DB2数据库中的两个表.

I'm trying to compare two tables in a DB2 database in z/OS using SPUFI to submit SQL queries.

我正在通过使用EXCEPT来查看两个SELECT查询之间的区别.

I'm doing this by using EXCEPT to see the difference between two SELECT queries.

我需要使用WHERE子句从第一个查询中过滤SELECT语句.

I need to filter the SELECT statement from the first query with a WHERE clause.

SELECT KEY_FIELD_1,LOOKUP_FIELD_1  
FROM TABLE_1  
WHERE FILTER_FIELD = '1'  
EXCEPT  
SELECT KEY FIELD_2,LOOKUP_FIELD_2  
FROM TABLE_2

我得到了结果，但它也返回了错误-199这是因为第二个SELECT语句中没有WHERE子句吗?

I got results back, but it also returned an error -199 Is this because the WHERE clause is not present in the second SELECT statement?

ERROR: ILLEGAL USE OF KEYWORD EXCEPT.  
TOKEN <ERR_STMT> <WNG_STMT> GET SQL  
SAVEPOINT HOLD FREE ASSOCIATE WAS EXPECTED

答

尝试引入括号，例如

( SELECT KEY_FIELD_1,LOOKUP_FIELD_1  
FROM TABLE_1  
WHERE FILTER_FIELD = '1' )  
EXCEPT  
( SELECT KEY FIELD_2,LOOKUP_FIELD_2  
FROM TABLE_2 )