//分页查询 select * from (select a.*,rownum as rn from JMONSTER a) b where b.rn between 0 and 3; //SELECT语句主要的字句 select select_list [INTO new_table] From table_source[WHERE search_condition] [GROUP BY group_by_expression] [HAVING search_condition] [ORDER BY oder_expression [ASC|DESC]] //获取系统当前时间 SELECT SYSDATE FROM Dual; //获取两个日期之间的月份 SELECT MONTHS_BETWEEN('23-4月-09','23-5月-09') FROM Dual //返回下个指定星期数的准确日期 SELECT NEXT_DAY(SYSDATE,'星期5') FROM Dual //当月的最后一天 SELECT LAST_DAY(SYSDATE) FROM Dual //对日期进行四舍五入 SELECT ROUND(SYSDATE,'YEAR') FROM Dual //日期格式 SELECT TO_CHAR(SYSDATE,'YYYY MM DD HH12:MI:SS') FROM Dual //to_date SELECT TO_DATE('2009-03-26 23:51:52','YYYY-MM-DD HH24:MI:SS') FROM Dual //并集操作 SELECT ID,NAME FROM WOODS UNION SELECT ID,NAME FROM ITEMS WHERE NAME LIKE '%木%' //交集操作 SELECT ID,NAME FROM WOODS INTERSECT SELECT ID,NAME FROM ITEMS WHERE NAME LIKE '%木%' //差集运算 SELECT ID,NAME FROM WOODS MINUS SELECT ID,NAME FROM ITEMS WHERE NAME LIKE '%木%' //递归查询 SELECT ID,ParaNTID,NAME FROM DEPARTMENT START WITH ID=0 CONNECT BY PRIOR ID = ParaNTID
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