Question

我需要使用子查询加入日期列表。

SELECT * 
FROM   (WITH daterange(level, dt) 
             AS (SELECT 1, 
                        CURRENT DATE - 7 DAYS 
                 FROM   SYSIBM.sysdummy1 
                 UNION ALL 
                 SELECT level + 1, 
                        dt + 1 DAY 
                 FROM   daterange 
                 WHERE  level < 1000 
                        AND dt < CURRENT DATE - 1 DAY) 
        SELECT dt 
         FROM   daterange)a 
        LEFT OUTER JOIN (SELECT WT.task_type_code, 
                                DATE(WT.created_ts) AS d, 
                                COUNT(WT.task_id)   AS COUNTER 
                         FROM   workflow_task WT, 
                                stage_item SI 
                         WHERE  WT.task_type_code IN( 2 ) 
                                AND DATE(WT.created_ts) >= '2016-03-18' 
                                AND DATE(WT.created_ts) <= '2016-03-26' 
                                AND SI.task_id = WT.task_id 
                         GROUP  BY WT.task_type_code, 
                                   DATE(WT.created_ts) 
                         ORDER  BY 2)b 
                     ON( A.dt = b.d ) 
WITH UR;

但是它会抛出一条错误消息

访问数据库时发生错误。非法使用关键字如。 TOKEN INNER LEFT RULL FULL CROSS JOIN;游客 SQL_CURLH200C1不在预备状态

请帮助我并建议我如何加入!!

Answer 1

使用WITH关键字开始查询，并移除最不需要的SELECT。

如何在DB2中使用另一个子查询加入日期列表

1 个答案: