Oracle纯SQL实现多行并一行

问题：在开发过程中需要实现以下效果

1 a

1 b ------> 1 a,b,c

1 c

1.oracle 10以上可以使用wmsys.wm_concat函数，相当Easy

2.如果Oracle是9以下，则用Procedure或Function实现

3.纯SQL实现：（Oracle9及以上 由于有 SYS_CONNECT_BY_PATH函数）

SELECT REPAIR_REC_SYS_ID, TRANSLATE (LTRIM (text, '/'), '*/', '*,') researcherList

FROM (SELECT ROW_NUMBER () OVER (PARTITION BY REPAIR_REC_SYS_ID ORDER BY REPAIR_REC_SYS_ID,

lvl DESC) rn,

REPAIR_REC_SYS_ID, text

FROM (SELECT REPAIR_REC_SYS_ID, LEVEL lvl,

SYS_CONNECT_BY_PATH (GOOD_PART,'/') text

FROM (SELECT REPAIR_REC_SYS_ID, GOOD_PART as GOOD_PART,

ROW_NUMBER () OVER (PARTITION BY REPAIR_REC_SYS_ID ORDER BY REPAIR_REC_SYS_ID,GOOD_PART) x

FROM REPAIR_REPL_DETAIl

ORDER BY REPAIR_REC_SYS_ID, GOOD_PART) a

CONNECT BY REPAIR_REC_SYS_ID = PRIOR REPAIR_REC_SYS_ID AND x - 1 = PRIOR x))

WHERE rn = 1

ORDER BY REPAIR_REC_SYS_ID

REPAIR_REC_SYS_ID：你需要合并的参照字段

GOOD_PART：需要合并的字段

REPAIR_REPL_DETAIl：表名