这个sql可以查出来所有的SELECTa.TASK_LEVEL,a.NUMBER2,a.SUBORDINATE_SYSTEM,a.CONTENT_TASK,a.PLANNED_DELIVERABLES,a.THOSE_RESPONSIBLE,a.COMPLETION_DATE,a.REMAINING_DAYS,a.ACTUAL_COMPLETION_DATE,a.STATE,a.LAST_WEEK_STATE,a.THIS_WEEK_STATE,a.DEPARTMENT,a.TASK_PERSON,a.TASK_CREATE_DAY,a.TASKS_REPORTING_DAY,a.TASK_REPLY_ADDEDFROMNEW_REPORT.TASK_MAINTENANCE a这个嵌套sql查出来一条SELECT c.TASK_LEVEL,c.NUMBER2,c.SUBORDINATE_SYSTEM,c.CONTENT_TASK,c.PLANNED_DELIVERABLES,c.THOSE_RESPONSIBLE,c.COMPLETION_DATE,c.REMAINING_DAYS,c.ACTUAL_COMPLETION_DATE,c.STATE,c.LAST_WEEK_STATE,c.THIS_WEEK_STATE,c.DEPARTMENT,c.TASK_PERSON,c.TASK_CREATE_DAY,c.TASKS_REPORTING_DAY,c.TASK_REPLY_ADDED,c.FYMONTH,c.FDATE,c.WEEK FROM(SELECTa.TASK_LEVEL,a.NUMBER2,a.SUBORDINATE_SYSTEM,a.CONTENT_TASK,a.PLANNED_DELIVERABLES,a.THOSE_RESPONSIBLE,a.COMPLETION_DATE,a.REMAINING_DAYS,a.ACTUAL_COMPLETION_DATE,a.STATE,a.LAST_WEEK_STATE,a.THIS_WEEK_STATE,a.DEPARTMENT,a.TASK_PERSON,a.TASK_CREATE_DAY,a.TASKS_REPORTING_DAY,a.TASK_REPLY_ADDED,b.FYMONTH,b.FDATE,CASE SUBSTR(b.FMWEEK,7,1) WHEN '1' THEN '第一周'WHEN '2' THEN '第二周'WHEN '3' THEN '第三周'WHEN '4' THEN '第四周'WHEN '5' THEN '第五周'ELSE '第六周' END WEEKFROMNEW_REPORT.TASK_MAINTENANCE a ,NEW_REPORT.MDM_TIME bWHEREa.TASKS_REPORTING_DAY = b.FDATE) c