oracle行转列函数/通用行转列

Oracle 10g： wm_concat 

Oracle 11g新增了函数：LISTAGG

简单例子：

SELECT 
a.id,
wm_concat (a.remark) new_result
FROM 
tb_name a
group by 
a.id

可以配合over一起使用，具体复杂的用法可以到时再查

通用SQL：

在使用过程中发现有些oracle会存在查询不出数据的问题，这个无解，所以找了个纯sql的列转行

SELECT feeapportion_id,
                       SUBSTR(MAX(SYS_CONNECT_BY_PATH(contract_no, ',')), 2) contract_no
                  FROM (SELECT feeapportion_id,
                               contract_no,
                               rn,
                               LEAD(rn) OVER(PARTITION BY feeapportion_id ORDER BY rn) rn1
                          FROM (SELECT feeapportion_id,
                                       contract_no,
                                       ROW_NUMBER() OVER(ORDER BY contract_no) rn
                                  FROM TH_SF_FEEAPPORTION_d))
                 START WITH rn1 IS NULL
                CONNECT BY rn1 = PRIOR rn
                 GROUP BY feeapportion_id