UNION的使用方法 （表与表直接数据和在一起的示例）

SELECT o.CATEGORY CATEGORY,o.KEY_WORK KEY_WORK FROM BO_EU_KEY_WORK wo RIGHT OUTER JOIN BO_EU_WORK_ONE o  ON  wo.BINDID = o.BINDID
WHERE wo.isend ='1'
UNION
SELECT o.CATEGORY CATEGORY,o.KEY_WORK KEY_WORK FROM BO_EU_KEY_WORK wo RIGHT OUTER JOIN BO_EU_WORK_TWO o   ON  wo.BINDID = o.BINDID
WHERE wo.isend ='1'
UNION
SELECT o.CATEGORY CATEGORY,o.KEY_WORK KEY_WORK FROM BO_EU_KEY_WORK wo RIGHT OUTER JOIN BO_EU_WORK_THREE o   ON  wo.BINDID = o.BINDID
WHERE wo.isend ='1'
UNION
SELECT o.CATEGORY CATEGORY,o.KEY_WORK KEY_WORK FROM BO_EU_KEY_WORK wo RIGHT OUTER JOIN BO_EU_WORK_FOUR o   ON  wo.BINDID = o.BINDID
WHERE wo.isend ='1'
UNION
SELECT o.CATEGORY CATEGORY,o.KEY_WORK KEY_WORK FROM BO_EU_KEY_WORK wo RIGHT OUTER JOIN BO_EU_WORK_FIVE o   ON  wo.BINDID = o.BINDID
WHERE wo.isend ='1'