我想加入我的第一个SQL查询与表类型,显示如下的id_pr value.ID_PR值重复。我想说明从逗号分隔符为同一id_pr和rodz_st值连接起来ident_st列的所有值。例如:对于显示rodz_st = 'DZE' 和id_pr = 13所有ident_st值。
第一查询:
SELECT NAME, NO FROM ORDERS o
LEFT JOIN TYPES t ON t.ID_ZM = o.ID_PR
表订单:
ID ID_ZM NAME NO
---------- ---------- ------- --------
1 12 Dee 333
2 13 Rods 111
表类型:
ID ID_PR RODZ_ST IDENT_ST
---------- ---------- ------- --------
16 12 JEW 646101_1
10 12 JEW 236496_2
11 13 JEW 147301_5
15 13 DZE 259435_1
12 13 OBR 452171_3
13 13 OBR 286432_6
17 12 DZE 618054_1
19 13 DZE 182235_4
我想造成象下面这样:
NAME NO JEW DZE OBR
------- ----- ---------------- ------------------ -----------------
Dee 333 646101_1, 236496_2 618054_1
Rods 111 147301_5 259435_1, 182235_4 452171_3, 286432_6
问:如何创建SQL与串联声明加入即可显示结果?
您可以使用列表LISTAGG
功能与DECODE
:
SELECT NAME, NO,
LISTAGG(DECODE(RODZ_ST,'JEW',IDENT_ST,NULL), ',') WITHIN GROUP (ORDER BY t.ID DESC, RODZ_ST) AS JEWS,
LISTAGG(DECODE(RODZ_ST,'DZE',IDENT_ST,NULL), ',') WITHIN GROUP (ORDER BY t.ID , RODZ_ST) AS DZE,
LISTAGG(DECODE(RODZ_ST,'OBR',IDENT_ST,NULL), ',') WITHIN GROUP (ORDER BY t.ID , RODZ_ST) AS OBR
FROM ORDERS o
LEFT JOIN TYPES t ON t.ID_PR = o.ID_ZM
GROUP BY NAME, NO;