oracle—SQL技巧之(一)连续记录查询sql案例测试
网络编程 2021-07-05 16:08www.168986.cn编程入门
有这样一个需求需要查询出某个客户某一年那些天是有连续办理过业务,本文给予sql实现语句并测试,感兴趣的朋友可以了解下
需求说明
需要查询出某个客户某一年那些天是有连续办理过业务
实现SQL如下
创建表
create table test_num
(tyear number,
tdate date);
测试数据
insert into test_num
select 2014,trunc(sysdate)-1 from dual union all
select 2014,trunc(sysdate)-002 from dual union all
select 2014,trunc(sysdate)-003 from dual union all
select 2014,trunc(sysdate)-004 from dual union all
select 2014,trunc(sysdate)-005 from dual union all
select 2014,trunc(sysdate)-007 from dual union all
select 2014,trunc(sysdate)-008 from dual union all
select 2014,trunc(sysdate)-009 from dual union all
select 2013,trunc(sysdate)-120 from dual union all
select 2013,trunc(sysdate)-121 from dual union all
select 2013,trunc(sysdate)-122 from dual union all
select 2013,trunc(sysdate)-124 from dual union all
select 2013,trunc(sysdate)-125 from dual union all
select 2013,trunc(sysdate)-127 from dual union all
select 2015,trunc(sysdate)-099 from dual union all
select 2015,trunc(sysdate)-100 from dual union all
select 2015,trunc(sysdate)-101 from dual union all
select 2015,trunc(sysdate)-102 from dual union all
select 2015,trunc(sysdate)-104 from dual union all
select 2015,trunc(sysdate)-105 from dual;
写SQL:
SELECT TYEAR, MIN(TDATE) AS STARTDATE, MAX(TDATE), COUNT(TYEAR) AS ENDNUM
FROM (SELECT A., A.TDATE - ROWNUM AS GNUM
FROM (SELECT FROM TEST_NUM ORDER BY TYEAR, TDATE) A)
GROUP BY TYEAR, GNUM
ORDER BY TYEAR, MIN(TDATE)
需要查询出某个客户某一年那些天是有连续办理过业务
实现SQL如下
创建表
代码如下:
create table test_num
(tyear number,
tdate date);
测试数据
insert into test_num
select 2014,trunc(sysdate)-1 from dual union all
select 2014,trunc(sysdate)-002 from dual union all
select 2014,trunc(sysdate)-003 from dual union all
select 2014,trunc(sysdate)-004 from dual union all
select 2014,trunc(sysdate)-005 from dual union all
select 2014,trunc(sysdate)-007 from dual union all
select 2014,trunc(sysdate)-008 from dual union all
select 2014,trunc(sysdate)-009 from dual union all
select 2013,trunc(sysdate)-120 from dual union all
select 2013,trunc(sysdate)-121 from dual union all
select 2013,trunc(sysdate)-122 from dual union all
select 2013,trunc(sysdate)-124 from dual union all
select 2013,trunc(sysdate)-125 from dual union all
select 2013,trunc(sysdate)-127 from dual union all
select 2015,trunc(sysdate)-099 from dual union all
select 2015,trunc(sysdate)-100 from dual union all
select 2015,trunc(sysdate)-101 from dual union all
select 2015,trunc(sysdate)-102 from dual union all
select 2015,trunc(sysdate)-104 from dual union all
select 2015,trunc(sysdate)-105 from dual;
写SQL:
代码如下:
SELECT TYEAR, MIN(TDATE) AS STARTDATE, MAX(TDATE), COUNT(TYEAR) AS ENDNUM
FROM (SELECT A., A.TDATE - ROWNUM AS GNUM
FROM (SELECT FROM TEST_NUM ORDER BY TYEAR, TDATE) A)
GROUP BY TYEAR, GNUM
ORDER BY TYEAR, MIN(TDATE)
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